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About your tasks: System Architecture & Engineering: Develop and optimize Node.js/TypeScript-based microservices , focusing on performance, modularity, and scalability. Contribute to architectural decisions that improve system maintainability and reliability. Frontend Development: Build and maintain React applications using Next.js (Pages Router) and Material-UI . Implement advanced form logic using Formik and JSONSchema validation. Ensure exceptional user experiences through responsive, accessible, and high-performance UI. Data & Messaging Systems: Integrate and optimize high-throughput data systems using MongoDB , Redis , and Algolia for real-time ad delivery and insights. Work with BullMQ and RabbitMQ to handle reliable, distributed message queuing and background processing. Cross-Functional Collaboration: Partner with Product, Design, and Analytics teams to deliver end-to-end Retail Media features. Participate in sprint planning, technical reviews, and solution discovery to ensure engineering is aligned with business goals. About you: Strong hands-on skills in JavaScript/TypeScript , Node.js , React , and modern web technologies. Deep experience building scalable microservices and frontend applications in cloud-native environments. Familiarity with AdTech or Retail Media platforms (eg such as Kevel, Google Ad Manager, CitrusAd, TopSort) will be looked upon favourably. Committed to writing clean, maintainable, and efficient code , with a strong focus on scalability, testing, and long-term system health . Comfortable working in Agile/Scrum teams and contributing proactively to cross-functional initiatives. A continuous learner who thrives in fast-moving environments and enjoys solving real-world business challenges with technology. Have AI experience, have integrated it into real systems and shipped features with it. About your benefits: In order to provide you with the best possible support for your individual needs - whether it‘s living a healthy life, having enough time for your family, or developing your skills - we offer a wide range of different, site-specific benefits: Sports: Stay healthy. Profit from a membership (M) package at Urban Sports Club, so that you can take advantage of a huge variety of sport offers. Work from Home: If your job does not require you to be present in the office, we can arrange the place you work from individually - even for up to 20 days a year anywhere in the EU. Mobility: We provide our employees with a fully costed Deutschland Ticket which can be used at any time. Personal development: Grow! We support and encourage your individual development through various in- and external trainings. Vacation: 30 days paid vacation per annum (plus another day on Rosenmontag) and the option to take unpaid vacation of up to 10 days (after one year working with us). Employee discount: You get a 10 % employee discount on all over the counter, beauty and personal care products in our online store & 20 % discount on nu3.

About the tech stack: Modern Machine Learning frameworks, Generative AI and agentic technologies, scalable data platforms, cloud infrastructure, containers and CI/CD tooling that support building, deploying and operating AI-powered business processes in production. About your tasks: Understand business processes and problems in depth and identify where AI, software, and process change can create meaningful value. Shape solutions together with stakeholders, looking beyond the initial request to understand what will actually improve the way work gets done. Design, build and evolve production-grade software and agentic AI systems that turn redesigned business processes into working solutions. Develop and integrate applications, APIs, data, AI components and agentic workflows using strong software engineering practices across development, testing, deployment and monitoring. Take problems from discovery through experimentation and implementation, staying involved until the redesigned process works in practice and delivers business value. Ensure the solutions you build can be evaluated, monitored, and operated reliably in production. About you: Strong software engineering fundamentals and hands-on experience building and shipping AI-enabled applications or systems, including core engineering practices such as Git, automated testing, containers, and CI/CD. Solid applied AI understanding, with practical knowledge of Generative AI, agentic systems, tool use, evaluation, observability, failure modes, and production concerns. Broad technical curiosity and the ability to get up to speed quickly in unfamiliar technologies and domains, while maintaining high engineering standards and going deeper when the problem requires it. Strong business judgement, communication, and collaboration skills, with an interest in understanding how work actually happens and solving complex problems as part of an engineering team. About your benefits: In order to provide our employees with the best possible support for their individual needs, we offer a wide range of benefits: Sports: Stay healthy. Profit from a membership (M) package at Urban Sports Club, so that you can take advantage of a huge variety of sport offers. Mental Health: Get quick and professional help from psychologists of Likeminded if you feel overwhelmed in private or professional life. Anonymous and free of charge. Work from Home: If your job does not require you to be present in the office, we can arrange the place you work from individually - even for up to 20 days a year anywhere in the EU. Mobility: We provide our employees with a fully costed Deutschland Ticket which can be used at any time. Click here to learn more. Personal development: Grow! We support and encourage your individual development through various in- and external trainings. And many more :)

About the tech stack: Modern Machine Learning frameworks, Generative AI and agentic technologies, scalable data platforms, cloud infrastructure, containers and CI/CD tooling that support building, deploying and operating AI-powered business processes in production. About your tasks: Understand business processes and problems in depth and identify where AI, software, and process change can create meaningful value. Shape solutions together with stakeholders, looking beyond the initial request to understand what will actually improve the way work gets done. Design, build and evolve production-grade software and agentic AI systems that turn redesigned business processes into working solutions. Develop and integrate applications, APIs, data, AI components and agentic workflows using strong software engineering practices across development, testing, deployment and monitoring. Take problems from discovery through experimentation and implementation, staying involved until the redesigned process works in practice and delivers business value. Ensure the solutions you build can be evaluated, monitored, and operated reliably in production. About you: Strong software engineering fundamentals and hands-on experience building and shipping AI-enabled applications or systems, including core engineering practices such as Git, automated testing, containers, and CI/CD. Solid applied AI understanding, with practical knowledge of Generative AI, agentic systems, tool use, evaluation, observability, failure modes, and production concerns. Broad technical curiosity and the ability to get up to speed quickly in unfamiliar technologies and domains, while maintaining high engineering standards and going deeper when the problem requires it. Strong business judgement, communication, and collaboration skills, with an interest in understanding how work actually happens and solving complex problems as part of an engineering team. About your benefits: In order to provide our employees with the best possible support for their individual needs, we offer a wide range of benefits: Sports: Stay healthy. Profit from a membership (M) package at Urban Sports Club, so that you can take advantage of a huge variety of sport offers. Mental Health: Get quick and professional help from psychologists of Likeminded if you feel overwhelmed in private or professional life. Anonymous and free of charge. Work from Home: If your job does not require you to be present in the office, we can arrange the place you work from individually - even for up to 20 days a year anywhere in the EU. Mobility: We provide our employees with a fully costed Deutschland Ticket which can be used at any time. Click here to learn more. Personal development: Grow! We support and encourage your individual development through various in- and external trainings. And many more :)

About the tech stack: Modern Machine Learning frameworks, Generative AI and agentic technologies, scalable data platforms, cloud infrastructure, containers and CI/CD tooling that support building, deploying and operating AI-powered business processes in production. About your tasks: Understand business processes and problems in depth and identify where AI, software, and process change can create meaningful value. Shape solutions together with stakeholders, looking beyond the initial request to understand what will actually improve the way work gets done. Design, build and evolve production-grade software and agentic AI systems that turn redesigned business processes into working solutions. Develop and integrate applications, APIs, data, AI components and agentic workflows using strong software engineering practices across development, testing, deployment and monitoring. Take problems from discovery through experimentation and implementation, staying involved until the redesigned process works in practice and delivers business value. Ensure the solutions you build can be evaluated, monitored, and operated reliably in production. About you: Strong software engineering fundamentals and hands-on experience building and shipping AI-enabled applications or systems, including core engineering practices such as Git, automated testing, containers, and CI/CD. Solid applied AI understanding, with practical knowledge of Generative AI, agentic systems, tool use, evaluation, observability, failure modes, and production concerns. Broad technical curiosity and the ability to get up to speed quickly in unfamiliar technologies and domains, while maintaining high engineering standards and going deeper when the problem requires it. Strong business judgement, communication, and collaboration skills, with an interest in understanding how work actually happens and solving complex problems as part of an engineering team. About your benefits: In order to provide our employees with the best possible support for their individual needs, we offer a wide range of benefits: Sports: Stay healthy. Profit from a membership (M) package at Urban Sports Club, so that you can take advantage of a huge variety of sport offers. Mental Health: Get quick and professional help from psychologists of Likeminded if you feel overwhelmed in private or professional life. Anonymous and free of charge. Work from Home: If your job does not require you to be present in the office, we can arrange the place you work from individually - even for up to 20 days a year anywhere in the EU. Mobility: We provide our employees with a fully costed Deutschland Ticket which can be used at any time. Click here to learn more. Personal development: Grow! We support and encourage your individual development through various in- and external trainings. And many more :)

About Your Tasks: App Development & Architecture Lead the design and development of scalable, maintainable Android applications using modern Android architecture (MVVM / MVI / Clean Architecture) Drive adoption of Jetpack Compose for building declarative, responsive UIs Ensure best practices in modularization, code quality, testing, and performance optimization, define and evolve the app’s architecture, ensuring scalability and long-term maintainability Collaboration Work closely with product managers, designers, and backend engineers to deliver high-quality, user-centric features Quality & Delivery Own the delivery pipeline, including CI/CD, testing (unit/UI), and release management Ensure app stability through monitoring, logging, and performance tracking tools Documentation Maintain clear and comprehensive documentation for architecture decisions, features, and technical processes Continuous Learning & Innovation Stay up to date with the latest Android trends, tools, and frameworks Proactively introduce improvements to the codebase, tooling, and development processes About You: Extensive experience in Android development with strong expertise in Kotlin Deep understanding of the Android SDK and modern Android development practices Hands-on experience with: Jetpack Compose Coroutines & Flow Dependency Injection (Hilt/Dagger) REST APIs (Retrofit/OkHttp) Strong knowledge of clean architecture principles, design patterns, and modularization Experience with testing (JUnit, Espresso, MockK) and writing maintainable, testable code Familiarity with CI/CD pipelines and modern development workflows Proven ability to take ownership of complex projects and deliver high-quality results independently Strong focus on performance, scalability, and user experience About your benefits: In order to provide our employees with the best possible support for their individual needs, we offer a wide range of benefits: Sports: Stay healthy. Profit from a membership (M) package at Urban Sports Club, so that you can take advantage of a huge variety of sport offers. Mental Health: Get quick and professional help from psychologists of Likeminded if you feel overwhelmed in private or professional life. Anonymous and free of charge. Work from Home: If your job does not require you to be present in the office, we can arrange the place you work from individually - even for up to 20 days a year anywhere in the EU. Mobility: We provide our employees with a fully costed Deutschland Ticket which can be used at any time. Click here to learn more. Personal development: Grow! We support and encourage your individual development through various in- and external trainings. And many more :)

About Your Tasks: App Development & Architecture Lead the design and development of scalable, maintainable Android applications using modern Android architecture (MVVM / MVI / Clean Architecture) Drive adoption of Jetpack Compose for building declarative, responsive UIs Ensure best practices in modularization, code quality, testing, and performance optimization, define and evolve the app’s architecture, ensuring scalability and long-term maintainability Collaboration Work closely with product managers, designers, and backend engineers to deliver high-quality, user-centric features Quality & Delivery Own the delivery pipeline, including CI/CD, testing (unit/UI), and release management Ensure app stability through monitoring, logging, and performance tracking tools Documentation Maintain clear and comprehensive documentation for architecture decisions, features, and technical processes Continuous Learning & Innovation Stay up to date with the latest Android trends, tools, and frameworks Proactively introduce improvements to the codebase, tooling, and development processes About You: Extensive experience in Android development with strong expertise in Kotlin Deep understanding of the Android SDK and modern Android development practices Hands-on experience with: Jetpack Compose Coroutines & Flow Dependency Injection (Hilt/Dagger) REST APIs (Retrofit/OkHttp) Strong knowledge of clean architecture principles, design patterns, and modularization Experience with testing (JUnit, Espresso, MockK) and writing maintainable, testable code Familiarity with CI/CD pipelines and modern development workflows Proven ability to take ownership of complex projects and deliver high-quality results independently Strong focus on performance, scalability, and user experience About your benefits: In order to provide our employees with the best possible support for their individual needs, we offer a wide range of benefits: Sports: Stay healthy. Profit from a membership (M) package at Urban Sports Club, so that you can take advantage of a huge variety of sport offers. Mental Health: Get quick and professional help from psychologists of Likeminded if you feel overwhelmed in private or professional life. Anonymous and free of charge. Work from Home: If your job does not require you to be present in the office, we can arrange the place you work from individually - even for up to 20 days a year anywhere in the EU. Mobility: We provide our employees with a fully costed Deutschland Ticket which can be used at any time. Click here to learn more. Personal development: Grow! We support and encourage your individual development through various in- and external trainings. And many more :)

About Your Tasks: App Development & Architecture Lead the design and development of scalable, maintainable Android applications using modern Android architecture (MVVM / MVI / Clean Architecture) Drive adoption of Jetpack Compose for building declarative, responsive UIs Ensure best practices in modularization, code quality, testing, and performance optimization, define and evolve the app’s architecture, ensuring scalability and long-term maintainability Collaboration Work closely with product managers, designers, and backend engineers to deliver high-quality, user-centric features Quality & Delivery Own the delivery pipeline, including CI/CD, testing (unit/UI), and release management Ensure app stability through monitoring, logging, and performance tracking tools Documentation Maintain clear and comprehensive documentation for architecture decisions, features, and technical processes Continuous Learning & Innovation Stay up to date with the latest Android trends, tools, and frameworks Proactively introduce improvements to the codebase, tooling, and development processes About You: Extensive experience in Android development with strong expertise in Kotlin Deep understanding of the Android SDK and modern Android development practices Hands-on experience with: Jetpack Compose Coroutines & Flow Dependency Injection (Hilt/Dagger) REST APIs (Retrofit/OkHttp) Strong knowledge of clean architecture principles, design patterns, and modularization Experience with testing (JUnit, Espresso, MockK) and writing maintainable, testable code Familiarity with CI/CD pipelines and modern development workflows Proven ability to take ownership of complex projects and deliver high-quality results independently Strong focus on performance, scalability, and user experience About your benefits: In order to provide our employees with the best possible support for their individual needs, we offer a wide range of benefits: Sports: Stay healthy. Profit from a membership (M) package at Urban Sports Club, so that you can take advantage of a huge variety of sport offers. Mental Health: Get quick and professional help from psychologists of Likeminded if you feel overwhelmed in private or professional life. Anonymous and free of charge. Work from Home: If your job does not require you to be present in the office, we can arrange the place you work from individually - even for up to 20 days a year anywhere in the EU. Mobility: We provide our employees with a fully costed Deutschland Ticket which can be used at any time. Click here to learn more. Personal development: Grow! We support and encourage your individual development through various in- and external trainings. And many more :)

About your tasks: Drive modularization and continuously evolve a scalable iOS architecture . Define, implement, and refine technical standards and architectural guidelines . Improve CI/CD reliability, build performance , and release processes . Strengthen testing strategy and establish strong quality foundations across teams. Improve app stability, performance, and overall technical health . Review and guide critical architectural decisions across multiple teams. Reduce technical debt strategically while enabling product teams through platform improvements . About you: You have strong expertise in Swift and experience working on large-scale production apps . You bring deep understanding of modular architecture and scalable app structures . You have hands-on experience with Clean Architecture, MVVM, or similar patterns. You understand modern concurrency concepts and memory management in iOS. You have solid experience with unit testing and improving test coverage . You have worked with CI/CD pipelines and understand release processes . You collaborate effectively across teams and bring strong debugging and performance optimization skills. About your benefits: In order to provide our employees with the best possible support for their individual needs, we offer a wide range of benefits: Sports: Stay healthy. Profit from a membership (M) package at Urban Sports Club, so that you can take advantage of a huge variety of sport offers. Mental Health: Get quick and professional help from psychologists of Likeminded if you feel overwhelmed in private or professional life. Anonymous and free of charge. Work from Home: If your job does not require you to be present in the office, we can arrange the place you work from individually - even for up to 20 days a year anywhere in the EU. Mobility: We provide our employees with a fully costed Deutschland Ticket which can be used at any time. Click here to learn more. Personal development: Grow! We support and encourage your individual development through various in- and external trainings. And many more :)