Verified Tech Jobs & Hiring Companies, Updated Every 24 Hours

SumUp builds simple, affordable financial tools that help small businesses get paid, manage their money, and grow. Beyond payments, we offer a number of financial products - including business banking, card products, lending, and invoicing — giving merchants everything they need to manage their payments and finances in one place. The Cards squad is a core part of that, owning the systems that power card issuing, lifecycle management, and transaction processing for merchants across Europe. We handle millions of card transactions every day, and we're now scaling those systems to support new product capabilities while laying the foundations for a more global, resilient platform. That's why we're growing the team and looking for a seasoned backend engineer who can take real ownership of complex, high-impact work. If you want to build systems that genuinely matter to small businesses and you're excited by the technical depth that comes with high-throughput, distributed architecture, this is the role for you. 🎥 Join us in our Sofia Team - get a feel for our Sofia office here . What you'll do Own and lead the end-to-end delivery of backend services within the Cards EU domain, including observability, testing, and production support Contribute to the technical roadmap by participating in architectural discussions and proposing solutions for complex, distributed systems challenges Raise well-scoped pull requests, conduct thorough code reviews, and help maintain high standards of code quality and test coverage across the team Collaborate closely with engineers in adjacent squads and with the product manager to shape and refine the squad backlog Participate in incident reviews and the on-call rotation, taking accountability for the reliability of the services you build Apply and champion AI tooling to accelerate engineering workflows, and help raise the team's overall AI literacy You'll be great for this role if… Solid, hands-on experience delivering production-ready backend services end-to-end, including testing, monitoring, and maintenance, on a modern cloud-native stack Production experience with Kotlin and an openness to work with additional languages such as Elixir, Java or Golang. Solid understanding of distributed systems, API design, data modelling, and working with relational databases Hands on experience in containerisation, orchestration, and CI/CD practices Ability to take an ambiguous product problem, define the technical approach, and lead it through to implementation with minimal guidance Comfort working across teams and communicating clearly in written and spoken English in a professional setting Genuine curiosity about the product domain — comfortable applying a backend lens during feature refinement and thinking beyond the code to understand how your work shapes the user experience Why you should join SumUp 🌍 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our modern Sofia office. This involves an office-first setup 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced 🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success 📚 A dedicated annual L&D budget of €2000 and 10 paid days of educational leave which can be used to attend conferences and/or advance your career through further education 🏖 Generous time off: 25 days of paid leave, plus one extra day per year of service (up to 35), along with public holidays and special leave options 🏥 Peace of mind: additional health insurance and life insurance 💪 Stay active: on-site yoga and a co-sponsored Multisport card offering access to hundreds of sports facilities 🍽 Meal support: benefit from a tax-free food voucher program plus flexibility via our Re:Benefits platform 🚌 Easy commute: free shuttle buses connecting directly to Joliot-Curie metro station 🌴 Break4me: 1-month sabbatical after 3 years of service 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team About SumUp Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify. SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Discover more about our culture and opportunities on our careers website , and follow our journey on LinkedIn , Instagram , and TikTok . Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

At SumUp, the Global Bank team builds the core infrastructure and services that give merchants a digital bank account, helping small businesses manage their money easily and reliably. The Balance Management Squad sits at the core of the Global Bank Platform. Right now, our team is completing a major milestone: consolidating and modernizing our balance management system in Europe. The next big step is creating a global transaction history service; a single, shared platform used by all regions to give merchants consistent and transparent views of their financial activity. As a Backend Engineer , you’ll help modernize existing systems while balancing innovation with stability, collaborate with teams across regions, and build reliable services that manage diverse markets with different regulations. If you enjoy solving complex problems on high-load systems, are curious about banking, and are looking for a team that tackles challenges head-on, we’d love to hear from you. What You’ll Do Build and evolve the SumUp’s core banking services that powers ledger operations and transactions, transforming our regional systems into a unified, scalable global platform. Tackle complex distributed systems challenges, ensuring resilient services that continue to perform under high transaction volumes. Support modernization initiatives by improving observability, adding test coverage, refactoring code for long-term maintainability, and gradually introducing new architectural patterns without disrupting live banking operations. Contribute to key architectural decisions - build ledger and transaction history systems from the ground up, ensuring a globally scalable banking solution for our clients. Collaborate with teams across Risk, Treasury, Finance, and Infrastructure to ensure smooth, compliant, and reliable global operations Take ownership from design to production, running the services you build, monitoring their performance, and continuously improving how we deliver high-quality software at scale. You’ll be great for this role if You have solid backend experience building reliable, high-volume services and you think carefully about system design, APIs, data modeling, and how services interact. You are proficient in Golang and comfortable learning and working with other languages as needed, e.g. Kotlin or Elixir. You write maintainable, well-tested code, follow CI/CD best practices, and take responsibility for the software you build from development to production. You’re comfortable building, deploying, and running services in cloud environments like AWS using Docker and Kubernetes. You’re eager to learn about relational databases that perform well under load and maintain data consistency. You are a collaborator who enjoys working across regions, communicating clearly, exchanging feedback effectively, and making thoughtful technical decisions together. You have a curiosity for building reliable financial services and banking domain It’s a plus if you have Knowledge of Elixir - some of our legacy services are written in Elixir, and while it's not essential, it would be useful if you've worked with it before Deeper PostgreSQL experience - we rely heavily on Postgres, so if you've done performance tuning, complex queries, or schema design, that's a plus Experience with event streaming platforms (Kafka preferred) and modern observability stacks (Grafana, Honeycomb, etc.) Why you should join SumUp Be part of a company that values diversity and celebrates unique perspectives. Work with a global team of skilled professionals in an environment that fosters collaboration, learning, and growth. Be part of a global tribe building a banking solution from the ground up and delivering impactful solutions to the real-life problems of millions of SumUp merchants all over the world Career growth and learning opportunities: We invest in your development through regular training, mentorship programs, SumUp University leadership cohort and a yearly learning budget (2,000 EUR) Sabbatical program for tenured SumUppers Join a global team where you belong: Check out our D&I Initiatives and Employee Resource Groups such as Pride Club, SumAfro, Neurodiversity, Grupos Mais, Women in Tech, and more Health & wellness benefits: in-house fitness classes, gym in the office, subsidized Urban Sports Club and available psychotherapy sessions A lot of other benefits such as Subsidized Public Transport Card, Kita placement assistance, Pension Scheme, Language Learning platform/courses etc. Enrollment onto our virtual stock ownership program - you will own a stake in SumUp’s future success About SumUp Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing a vast set of simple and affordable business tools to help them start, run, and grow their businesses. Today, over 4 million businesses in 36 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster an inclusivity and continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify. SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Explore career opportunities with us and join a team driven by collaboration, innovation, and a shared vision of creating a world where everyone can build a thriving business. Discover more about our vibrant and inclusive work culture and how we work on our careers website , and follow our journey on LinkedIn and Instagram . Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

At SumUp, the Global Bank team builds the core infrastructure and services that give merchants a digital bank account, helping small businesses manage their money easily and reliably. The Balance Management Squad sits at the core of the Global Bank Platform. Right now, our team is completing a major milestone: consolidating and modernizing our balance management system in Europe. The next big step is creating a global transaction history service; a single, shared platform used by all regions to give merchants consistent and transparent views of their financial activity. As a Backend Engineer , you’ll help modernize existing systems while balancing innovation with stability, collaborate with teams across regions, and build reliable services that manage diverse markets with different regulations. If you enjoy solving complex problems on high-load systems, are curious about banking, and are looking for a team that tackles challenges head-on, we’d love to hear from you. The Vilnius team is a core part of the Global Bank domain. We own production systems, shape technical direction, and work closely with colleagues across SumUp’s global offices on critical merchant banking capabilities. Join our Vilnius Team today ( Vilnius office ). What You’ll Do Build and evolve the SumUp’s core banking services that powers ledger operations and transactions, transforming our regional systems into a unified, scalable global platform. Tackle complex distributed systems challenges, ensuring resilient services that continue to perform under high transaction volumes. Support modernization initiatives by improving observability, adding test coverage, refactoring code for long-term maintainability, and gradually introducing new architectural patterns without disrupting live banking operations. Contribute to key architectural decisions - build ledger and transaction history systems from the ground up, ensuring a globally scalable banking solution for our clients. Collaborate with teams across Risk, Treasury, Finance, and Infrastructure to ensure smooth, compliant, and reliable global operations Take ownership from design to production, running the services you build, monitoring their performance, and continuously improving how we deliver high-quality software at scale. You’ll be great for this role if You have solid backend experience building reliable, high-volume services and you think carefully about system design, APIs, data modeling, and how services interact. You are proficient in Golang and comfortable learning and working with other languages as needed, e.g. Kotlin or Elixir. You write maintainable, well-tested code, follow CI/CD best practices, and take responsibility for the software you build from development to production. You’re comfortable building, deploying, and running services in cloud environments like AWS using Docker and Kubernetes. You’re eager to learn about relational databases that perform well under load and maintain data consistency. You are a collaborator who enjoys working across regions, communicating clearly, exchanging feedback effectively, and making thoughtful technical decisions together. You have a curiosity for building reliable financial services and banking domain It’s a plus if you have Knowledge of Elixir - some of our legacy services are written in Elixir, and while it's not essential, it would be useful if you've worked with it before Deeper PostgreSQL experience - we rely heavily on Postgres, so if you've done performance tuning, complex queries, or schema design, that's a plus Experience with event streaming platforms (Kafka preferred) and modern observability stacks (Grafana, Honeycomb, etc.) Why you should join SumUp 🌎 We’re a truly global team of 3200+ skilled professionals from 92+ countries, spread across 4 continents. Join the team from our Vilnius office. 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced. 🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp’s future success 🏖️ Time off: 25 days of paid leave, plus special holidays 🏥 Peace of mind: health insurance through Gjensidige and life & accidental coverage from Ergo 💪 Stay active: gym membership allowance to help you keep fit on your terms 📚Career growth and learning opportunities: We invest in your development through regular training, mentorship programs, SumUp University cohort and a yearly learning budget (2,000 EUR) 💡We take learning and experimentation seriously with Hack Days every second Friday, and entire global Hack Weeks . 🌴 Break4me: 1-month sabbatical after 3 years of service 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team. Compensation : In Lithuania, for a Mid Level Engineer is 3,493 to 4,657 Euro Gross and for an Early Senior Engineer is 4,366 to 5,822 Euro Gross p/m + 2000 EUR annual learning budget + Virtual Stock Options. Offer may vary based on skills, experience and outcome from the hiring process. About SumUp Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing a vast set of simple and affordable business tools to help them start, run, and grow their businesses. Today, over 4 million businesses in 36 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster an inclusivity and continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify. SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Explore career opportunities with us and join a team driven by collaboration, innovation, and a shared vision of creating a world where everyone can build a thriving business. Discover more about our vibrant and inclusive work culture and how we work on our careers website , and follow our journey on LinkedIn and Instagram . Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

At SumUp, we empower small businesses with simple, affordable tools to start, run, and grow. Our Global Bank teams build the financial services that help merchants manage their money and keep their businesses moving. For merchants, a transfer should feel simple. Behind that experience is a complex network of payment schemes, banks, providers, messages, certificates, reconciliations, and edge cases—all of which need to work together reliably. Transfers Europe squad is the integration layer connecting SumUp’s internal systems with the financial networks that move money across Europe and the UK. We build and run the backend services behind SEPA and UK transfer flows, helping move money accurately and reliably across external networks. As a Backend Engineer, you’ll take ownership of services that process real money. You’ll work on complex systems problems to ensure seamless integrations as we scale, while seeing a direct connection between your engineering decisions and merchant trust. If you enjoy understanding how systems behave under real-world conditions while improving them over time, we’d love to hear from you. Our tech stack includes Golang, AWS, Kafka, PostgreSQL, Redis and Kubernetes, supported by a strong observability toolchain with Prometheus, Grafana, and Honeycomb. We also actively use AI‑assisted development tools such as Cursor, GitHub Copilot, and others. What you’ll do Build and maintain production money movement backend services , contributing to their delivery, observability, and ongoing maintenance. Own and deliver well‑defined tasks and features , and contribute to larger projects within the team’s domain. Contribute to technical design and implementation , following established architectural patterns and best practices. Improve service reliability and quality by writing tests , enhancing monitoring , and following established delivery pipelines. Support the operation of the systems you work on by participating in on‑call rotations, incident response, and learning from post‑incident reviews. Apply a backend and systems perspective during refinement, raising questions about risks, dependencies, and edge cases. Collaborate closely with Product, QA, and other engineers to deliver end‑to‑end transfer and banking capabilities. You’ll be great for this role if you Have experience building backend services in a modern environment and supporting them in production. You are proficient in Golang and and comfortable learning and working with other languages as needed Are comfortable working with cloud‑based systems, containerized workloads, and automated delivery pipelines. Raise well-scoped pull requests, conduct thorough code reviews, and help maintain high standards of code quality and test coverage across the team Understand the fundamentals of system architecture, data modelling, and API design, and are eager to deepen this knowledge. Are curious about how your work fits into the broader system and product experience. Communicate clearly and collaborate effectively with engineers, product managers, and other stakeholders. Any of the following would be considered a plus Exposure to banking, payments, or financial systems, especially in regulated environments. Experience supporting systems with production traffic, including participating in incident response. Use of AI‑assisted tools to improve development speed, learning, or code quality. Why you should join SumUp 🌎 We’re a truly global team of 3200+ skilled professionals from 92+ countries, spread across 4 continents. Join the team from our Vilnius office. 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced. 🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp’s future success 🏖️ Time off: 25 days of paid leave, plus special holidays 🏥 Peace of mind: health insurance through Gjensidige and life & accidental coverage from Ergo 💪 Stay active: gym membership allowance to help you keep fit on your terms 📚Career growth and learning opportunities: We invest in your development through regular training, mentorship programs, SumUp University cohort and a yearly learning budget (2,000 EUR) 💡We take learning and experimentation seriously with Hack Days every second Friday, and entire global Hack Weeks . 🌴 Break4me: 1-month sabbatical after 3 years of service 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team. Compensation : In Lithuania, for a Mid Level Engineer is 3,493 to 4,657 Euro Gross and for an Early Senior Engineer is 4,366 to 5,822 Euro Gross p/m + 2000 EUR annual learning budget + Virtual Stock Options. Offer may vary based on skills, experience and outcome from the hiring process. About SumUp At SumUp, we’re on a mission to empower small businesses around the world with simple, affordable tools to help them start, run, and grow. More than 4 million merchants across 37 markets trust us as their financial partner — and we’re just getting started. We’re a global team of 3,000+ people from over 90 nationalities, united by curiosity, collaboration, and care. Our core values and culture shape everything we do, fostering inclusion, learning, and belonging. SumUp is proud to be an Equal Employment Opportunity employer, committed to building a safe, respectful, and diverse workplace where everyone can thrive. 👉 Explore more about our culture on our careers site , or follow us on LinkedIn and Instagram . SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

At SumUp, we empower small businesses with simple, affordable tools to start, run, and grow. Our Global Bank teams build the financial services that help merchants manage their money and keep their businesses moving. For merchants, a transfer should feel simple. Behind that experience is a complex network of payment schemes, banks, providers, messages, certificates, reconciliations, and edge cases—all of which need to work together reliably. Transfers Europe squad is the integration layer connecting SumUp’s internal systems with the financial networks that move money across Europe and the UK. We build and run the backend services behind SEPA and UK transfer flows, helping move money accurately and reliably across external networks. As a Backend Engineer, you’ll take ownership of services that process real money. You’ll work on complex systems problems to ensure seamless integrations as we scale, while seeing a direct connection between your engineering decisions and merchant trust. If you enjoy understanding how systems behave under real-world conditions while improving them over time, we’d love to hear from you. Our tech stack includes Golang, AWS, Kafka, PostgreSQL, Redis and Kubernetes, supported by a strong observability toolchain with Prometheus, Grafana, and Honeycomb. We also actively use AI‑assisted development tools such as Cursor, GitHub Copilot, and others. What you’ll do Build and maintain production money movement backend services , contributing to their delivery, observability, and ongoing maintenance. Own and deliver well‑defined tasks and features , and contribute to larger projects within the team’s domain. Contribute to technical design and implementation , following established architectural patterns and best practices. Improve service reliability and quality by writing tests , enhancing monitoring , and following established delivery pipelines. Support the operation of the systems you work on by participating in on‑call rotations, incident response, and learning from post‑incident reviews. Apply a backend and systems perspective during refinement, raising questions about risks, dependencies, and edge cases. Collaborate closely with Product, QA, and other engineers to deliver end‑to‑end transfer and banking capabilities. You’ll be great for this role if you Have experience building backend services in a modern environment and supporting them in production. You are proficient in Golang and and comfortable learning and working with other languages as needed Are comfortable working with cloud‑based systems, containerized workloads, and automated delivery pipelines. Raise well-scoped pull requests, conduct thorough code reviews, and help maintain high standards of code quality and test coverage across the team Understand the fundamentals of system architecture, data modelling, and API design, and are eager to deepen this knowledge. Are curious about how your work fits into the broader system and product experience. Communicate clearly and collaborate effectively with engineers, product managers, and other stakeholders. Any of the following would be considered a plus Exposure to banking, payments, or financial systems, especially in regulated environments. Experience supporting systems with production traffic, including participating in incident response. Use of AI‑assisted tools to improve development speed, learning, or code quality. Why you should join SumUp 🌎 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced 🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success 📚 A dedicated annual L&D budget of €2000 for your individual development, which can be used to attend conferences and/or advance your career through further education 💶 A corporate pension scheme where we match up to 20% of your contributions 🏖 Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days 🩺 Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches 🌴 Break4me: 1-month sabbatical after 3 years of service 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team About SumUp Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing a vast set of simple and affordable business tools to help them start, run, and grow their businesses. Today, over 4 million businesses in 36 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster an inclusivity and continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify. SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Explore career opportunities with us and join a team driven by collaboration, innovation, and a shared vision of creating a world where everyone can build a thriving business. Discover more about our vibrant and inclusive work culture and how we work on our careers website , and follow our journey on LinkedIn and Instagram . Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

SumUp builds simple, affordable financial tools that help over 4 million small businesses across 37 markets get paid, manage their money, and grow. Beyond card payments, we offer a full suite of financial products - business banking, lending, invoicing, and money transfers - giving merchants everything they need in one place. We're a global fintech with over 3,000 people across 20+ offices, and Sofia has been one of our most important engineering hubs since the very beginning. Our Transfers Excellence squad sits within SumUp's Global Bank , and owns the core services that power how merchants and consumers move money. E.g. IBAN-based transfers, money in and out, and peer-to-peer payments via the SumUp consumer app. With the high volume transfers per hour across our European markets. That means reliability isn't a nice-to-have - it's the baseline for us. Right now, the team is replacing a set of market-specific implementations with a single, unified global transfer platform that will serve Europe, the UK, Brazil, Chile, and eventually the US and Canada. Join our team and contribute directly to platform-level architecture that will shape how SumUp moves money at scale - work that directly impacts millions of small businesses every day. Our tech stack includes Kotlin, AWS, Kafka, PostgreSQL, and Kubernetes, supported by a strong observability toolchain with Prometheus, Grafana, and Honeycomb. We also actively use AI‑assisted development tools such as Cursor, GitHub Copilot, and others. 🎥 Get a feel for life in our Sofia office . What you'll do Build and maintain backend services that sit at the heart of SumUp's transfer infrastructure, taking end-to-end ownership from development through to observability, testing and production support Contribute to the migration from market-specific services toward a unified global transfer platform, working across a mix of active services and legacy systems being decomposed Raise well-scoped pull requests, conduct thorough code reviews, and help maintain high standards of code quality and test coverage across the team Participate in incident reviews and the on-call rotation, taking accountability for the reliability of the services you build Contribute to the technical roadmap by participating in architectural discussions and proposing solutions for complex, distributed systems challenges Apply AI tooling to accelerate your own engineering workflows and contribute to raising the team's overall AI literacy You'll be great for this role if… Solid experience as a Backend Software Engineer in modern languages (e.g. Kotlin, Go, etc.). Kotlin is the team's primary language and we also work with Java, Golang, and Elixir. Solid understanding of distributed systems and event-driven architecture. Experience with async processing and messaging tools like Kafka (or similar). Experience working with microservice architectures, including Spring Boot and event-driven patterns, alongside solid knowledge of relational databases and API design Comfortable working in high-throughput, regulated environments where reliability matters. Defensive coding and attention to edge cases are part of the job Clear communicator in written and spoken English, with a collaborative approach to working across global teams Curious about the product impact, not just the code. Comfortable thinking about how backend decisions affect the end user experience. Why you should join SumUp 🌍 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our modern Sofia office. This involves an office-first setup 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced 🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success 📚 A dedicated annual L&D budget of €2000 and 10 paid days of educational leave which can be used to attend conferences and/or advance your career through further education 🏖 Generous time off: 25 days of paid leave, plus one extra day per year of service (up to 35), along with public holidays and special leave options 🏥 Peace of mind: additional health insurance and life insurance 💪 Stay active: on-site yoga and a co-sponsored Multisport card offering access to hundreds of sports facilities 🍽 Meal support: benefit from a tax-free food voucher program plus flexibility via our Re:Benefits platform 🚌 Easy commute: free shuttle buses connecting directly to Joliot-Curie metro station 🌴 Break4me: 1-month sabbatical after 3 years of service 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team About SumUp Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify. SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Discover more about our culture and opportunities on our careers website , and follow our journey on LinkedIn , Instagram , and TikTok . Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

Data Platform Engineer (Mid-Level) Onsite Role - Office First Team description As part of the Platform tribe, we're building a self-service, AI-ready Data Platform that powers SumUp's next big bets: data, AI, and real-time analytics. Our team designs and runs the infrastructure that lets data engineers, analysts, and ML teams across the business ship reliable pipelines and products without reinventing the wheel each time. This role sits at the centre of that work, giving you a genuine chance to shape how thousands of SumUppers build with data every day. What you'll do Build and evolve the data platform's infrastructure (Terraform, Kubernetes, GCP), so every environment is reproducible, version-controlled, and auditable Take end-to-end ownership of the reliability, performance, and scalability of the Data and AI platforms Develop self-service features, including for ETL and orchestration, so teams can move faster without bespoke integrations Automate operations to keep the platform highly available and cost-efficient as demand grows Evaluate emerging technologies and shape adoption strategies that improve platform capabilities and business outcomes Partner with product, infrastructure, data engineering, analytics, and AI/ML teams to make the standard path easier and safer than one-off integrations You'll be great for this role if… More than 4 years of experience building internal platforms consumed by other teams, in a Data, Platform, or Software Engineering role Strong software engineering background in Python or Go , along with solid SQL skills Hands-on knowledge of infrastructure and containerisation, such as Terraform, Helm, Docker, and Kubernetes Comfort working with observability, monitoring, alerting, and platform reliability engineering practices Experience in modern data stack (dbt, Snowflake, Trino, Airflow, etc.) Track record of setting up SDLC practices for analytics teams, including Git workflows, CI/CD, testing, and documentation standards It's OK if you don't meet 100% of these criteria. If you're missing a few, it just means you'll have room to learn and grow with us. Nice to have: Real-time streaming experience (e.g. Kafka, Flink, StarRocks, Pinot, Druid, ClickHouse) Experience working with systems at petabyte scale Experience implementing AI-enabled systems, such as agentic SRE or AI automation Why you should join SumUp 🌎 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced 🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success 📚 A dedicated annual L&D budget of €2000 for your individual development, which can be used to attend conferences and/or advance your career through further education 💶 A corporate pension scheme where we match up to 20% of your contributions 🏖 Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches 🌴 Break4me: 1-month sabbatical after 3 years of service 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team About SumUp Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 38 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values shape who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify. SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Discover more about our culture and opportunities on our careers website , and follow our journey on LinkedIn , Instagram , and TikTok . 📽 Want to add a video or LinkedIn post to accompany this job ad? Check out the Global Employer Brand video library . Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.

Our AI Platform & Edge team sits at the heart of how SumUp is scaling intelligent, merchant-facing experiences across millions of interactions. We build and operate the AI systems — from LLM-powered assistants to agentic platforms — that directly shape how merchants get support, resolve issues, and engage with SumUp's products. As Engineering Manager for Edge, you'll take ownership of a growing, cross-functional team of engineers and ML specialists, leading the execution of some of our most technically complex and commercially critical AI initiatives. This is a rare opportunity to lead meaningful AI work at scale — not just shipping features, but shaping how an entire platform evolves. What you'll do Lead the day-to-day execution of the Edge AI team, translating long-term product vision into clear sprint roadmaps and measurable delivery milestones Own the migration of our AI assistant to an autonomous agentic setup, maintaining performance while expanding AI support across all merchant-facing channels Set the technical direction for LLM-powered system design, making clear tradeoffs across quality, latency, and cost Build a data-informed engineering culture by defining performance metrics, tracking delivery velocity, and using insights to continuously improve team health and throughput Hire, mentor, and develop a team of engineers and ML specialists — including interns — creating an environment where people grow and do their best work You'll be great for this role if… Strong hands-on background in ML/AI engineering or data science, with experience leading a team delivering production AI products Deep technical knowledge of LLM-powered system design, including RAG, embeddings, tool/function calling, and orchestration frameworks such as LangChain or LlamaIndex Proficiency in Python and core AI/ML libraries, including PyTorch and HuggingFace Transformers, with solid LLMOps/MLOps and CI/CD practices Proven track record of launching AI features end-to-end in production — from problem framing and prototyping through to reliable, measurable delivery Ability to lead with clarity, empathy, and accountability — building inclusive, high-performing teams while navigating ambiguity and managing stakeholders across technical and non-technical domains Why you should join SumUp 🌎 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup 🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced 🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success 📚 A dedicated annual L&D budget of €2000 for your individual development, which can be used to attend conferences and/or advance your career through further education 💶 A corporate pension scheme where we match up to 20% of your contributions 🏖 Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days 🏙 Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches 🌴 Break4me: 1-month sabbatical after 3 years of service 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team About SumUp Be empowered to do more that matters. At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Our commitment to small businesses is reflected in our diverse team of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify. SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don't make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Discover more about our culture and opportunities on our careers website , and follow our journey on LinkedIn , Instagram , and TikTok . Job Application Tip We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.