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About your tasks: Lead the design and development of scalable, maintainable, and high-performing Android applications using Kotlin and modern Android architecture patterns such as MVVM, MVI, and Clean Architecture . Define and evolve the Android application architecture , ensuring scalability, modularity, testability, and long-term maintainability. Drive the adoption and effective use of Jetpack Compose to build modern, declarative, reusable, and responsive user interfaces. Design and build reusable mobile components for Retail Media and advertising experiences , including Sponsored Products, Sponsored Brands, native placements, display banners, and personalized product recommendations . Integrate Retail Media placements naturally into product discovery, search, category, product detail, and other commerce journeys , balancing monetization objectives with a high-quality customer experience. Collaborate with backend, data, product, and ad server teams on APIs, tracking contracts, campaign metadata, targeting, attribution, and measurement requirements . Build flexible and configurable solutions that enable new ad formats, placements, campaigns, and monetization use cases to be introduced efficiently. Ensure best practices in modularization, code quality, testing, and performance optimization, define and evolve the app’s architecture, ensuring scalability and long-term maintainability Build reusable mobile components for Retail Media experiences, including Sponsored Products, Sponsored Brands, product recommendations, banners. Ensure engineering best practices across modularization, code quality, dependency management, observability, testing, security, and performance optimization . Improve CI/CD reliability, build performance , and release processes . Maintain clear and comprehensive documentation for architecture decisions, features, and technical processes Review and guide critical technical and architectural decisions , contributing to engineering standards and best practices across teams. Improve app stability, performance, and overall technical health . Reduce technical debt strategically while enabling product teams through platform improvements . Implement and evolve feature flags, experimentation frameworks, and A/B testing to validate new customer and advertising experiences through measurable outcomes. 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 You collaborate effectively across teams and bring strong debugging and performance optimization skills. Experience working in Retail Media , AdTech, MarTech large-scale e-commerce platforms. 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: Lead the design and development of scalable, maintainable, and high-performing Android applications using Kotlin and modern Android architecture patterns such as MVVM, MVI, and Clean Architecture . Define and evolve the Android application architecture , ensuring scalability, modularity, testability, and long-term maintainability. Drive the adoption and effective use of Jetpack Compose to build modern, declarative, reusable, and responsive user interfaces. Design and build reusable mobile components for Retail Media and advertising experiences , including Sponsored Products, Sponsored Brands, native placements, display banners, and personalized product recommendations . Integrate Retail Media placements naturally into product discovery, search, category, product detail, and other commerce journeys , balancing monetization objectives with a high-quality customer experience. Collaborate with backend, data, product, and ad server teams on APIs, tracking contracts, campaign metadata, targeting, attribution, and measurement requirements . Build flexible and configurable solutions that enable new ad formats, placements, campaigns, and monetization use cases to be introduced efficiently. Ensure best practices in modularization, code quality, testing, and performance optimization, define and evolve the app’s architecture, ensuring scalability and long-term maintainability Build reusable mobile components for Retail Media experiences, including Sponsored Products, Sponsored Brands, product recommendations, banners. Ensure engineering best practices across modularization, code quality, dependency management, observability, testing, security, and performance optimization . Improve CI/CD reliability, build performance , and release processes . Maintain clear and comprehensive documentation for architecture decisions, features, and technical processes Review and guide critical technical and architectural decisions , contributing to engineering standards and best practices across teams. Improve app stability, performance, and overall technical health . Reduce technical debt strategically while enabling product teams through platform improvements . Implement and evolve feature flags, experimentation frameworks, and A/B testing to validate new customer and advertising experiences through measurable outcomes. 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 You collaborate effectively across teams and bring strong debugging and performance optimization skills. Experience working in Retail Media , AdTech, MarTech large-scale e-commerce platforms. 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: Lead the design and development of scalable, maintainable, and high-performing Android applications using Kotlin and modern Android architecture patterns such as MVVM, MVI, and Clean Architecture . Define and evolve the Android application architecture , ensuring scalability, modularity, testability, and long-term maintainability. Drive the adoption and effective use of Jetpack Compose to build modern, declarative, reusable, and responsive user interfaces. Design and build reusable mobile components for Retail Media and advertising experiences , including Sponsored Products, Sponsored Brands, native placements, display banners, and personalized product recommendations . Integrate Retail Media placements naturally into product discovery, search, category, product detail, and other commerce journeys , balancing monetization objectives with a high-quality customer experience. Collaborate with backend, data, product, and ad server teams on APIs, tracking contracts, campaign metadata, targeting, attribution, and measurement requirements . Build flexible and configurable solutions that enable new ad formats, placements, campaigns, and monetization use cases to be introduced efficiently. Ensure best practices in modularization, code quality, testing, and performance optimization, define and evolve the app’s architecture, ensuring scalability and long-term maintainability Build reusable mobile components for Retail Media experiences, including Sponsored Products, Sponsored Brands, product recommendations, banners. Ensure engineering best practices across modularization, code quality, dependency management, observability, testing, security, and performance optimization . Improve CI/CD reliability, build performance , and release processes . Maintain clear and comprehensive documentation for architecture decisions, features, and technical processes Review and guide critical technical and architectural decisions , contributing to engineering standards and best practices across teams. Improve app stability, performance, and overall technical health . Reduce technical debt strategically while enabling product teams through platform improvements . Implement and evolve feature flags, experimentation frameworks, and A/B testing to validate new customer and advertising experiences through measurable outcomes. 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 You collaborate effectively across teams and bring strong debugging and performance optimization skills. Experience working in Retail Media , AdTech, MarTech large-scale e-commerce platforms. 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 . Build reusable mobile components for Retail Media experiences, including Sponsored Products, Sponsored Brands, product recommendations, banners. 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 . Implement feature flags, experimentation, and A/B testing to validate new customer experiences. About you: You have strong expertise in Swift and experience working on large-scale production apps . Experience building cross platform application in KMP and Android experience is additional add-on. 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. Experience working in Retail Media , AdTech, MarTech large-scale e-commerce platforms. 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 . Build reusable mobile components for Retail Media experiences, including Sponsored Products, Sponsored Brands, product recommendations, banners. 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 . Implement feature flags, experimentation, and A/B testing to validate new customer experiences. About you: You have strong expertise in Swift and experience working on large-scale production apps . Experience building cross platform application in KMP and Android experience is additional add-on. 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. Experience working in Retail Media , AdTech, MarTech large-scale e-commerce platforms. 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 . Build reusable mobile components for Retail Media experiences, including Sponsored Products, Sponsored Brands, product recommendations, banners. 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 . Implement feature flags, experimentation, and A/B testing to validate new customer experiences. About you: You have strong expertise in Swift and experience working on large-scale production apps . Experience building cross platform application in KMP and Android experience is additional add-on. 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. Experience working in Retail Media , AdTech, MarTech large-scale e-commerce platforms. 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 role: As a Test Automation Engineer in our Quality Assurance ERP team, you’ll help shape reliable and scalable test automation for business-critical ERP processes and integrations. You’ll have the opportunity to take ownership of automation quality, identify risks earlier in the development lifecycle and continuously improve how we test and deliver software together with QA, engineering and business colleagues. About the tech stack: You’ll primarily work with Robot Framework and Python , using GitHub for version control and development workflows and aqua for test management, documentation and traceability. Depending on the project, you may also work with API testing, Playwright, CI/CD environments, Java, Microsoft Dynamics and e-commerce processes. About your tasks: Build and evolve our test automation: Develop reliable and scalable automated test solutions that strengthen coverage across our ERP landscape, while keeping existing test suites effective as applications, interfaces and business processes evolve. Embed quality into development workflows: Integrate test automation into GitHub-based development workflows, helping teams identify quality risks earlier and supporting consistent testing throughout the software development lifecycle. Create end-to-end traceability: Connect automated testing with test documentation and management, ensuring clear links between requirements, test cases, execution and results. Turn test results into improvements: Analyse automated test results and defects, identify quality risks and translate your findings into actionable insights for QA and engineering colleagues. Shape better testing practices: Collaborate with QA, developers and business stakeholders to improve automation approaches, maintainability and reliability while ensuring critical ERP processes and integrations are effectively covered. About you: You bring hands-on professional experience in software testing and test automation and are comfortable developing and maintaining automated tests within software development environments. You have practical expertise with Robot Framework and Python , alongside experience with version control and collaborative development workflows. Experience with AI tools and/or a ISTQB certification or equivalent recognized ISTQB qualification is a plus. You can work professionally in German and English and enjoy translating technical quality challenges into practical solutions together with QA, engineering and business colleagues. 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: Welcome days: We want you to feel at home with us from the very first day. Therefore, we welcome you with our comprehensive onboarding program. 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. Mental Health: Get quick and professional help from psychologists of nilo if you feel overwhelmed in private or professional life. Anonymous and free of charge. Personal development: Grow! We support and encourage your individual development through various in- and external trainings. Employee referral program: Because you know best who fits in with us, successful recommendations are rewarded with a bonus.

About your tasks: Work with colleagues from our Data & AI department and collaborate closely with product managers, engineers, and commercial stakeholders. Design, build, and operate machine learning systems for retail media use cases such as sponsored product ranking, audience segmentation, campaign optimization, attribution, and performance measurement. Translate business and product requirements into scalable ML solutions, balancing model quality, latency, reliability, scalability, and maintainability. Develop robust ML pipelines for feature engineering, training, evaluation, deployment, monitoring, and continuous model improvement. Bring models into production using our cloud-based stack and ensure they are reliable, observable, and maintainable over time. Communicate technical decisions, assumptions, limitations, and uncertainty clearly to product, engineering, and business stakeholders. Contribute to ML engineering standards, best practices, and knowledge sharing within the team. About you: You have several years of hands-on experience as a Machine Learning Engineer, ML-focused Software Engineer, or Data Scientist with strong engineering experience. You have built and operated production-grade machine learning systems, pipelines, or model-based products. You have experience working with retail media, or alternatively recommender systems or ranking. You are comfortable working with complex data and understand common ML failure modes such as data leakage, feedback loops, distribution shifts, and misleading offline metrics. You enjoy working close to the business and can explain complex technical topics clearly to non-technical stakeholders. You take ownership, work proactively, and are comfortable navigating ambiguity in an early-stage product environment. You value collaboration, give and receive feedback openly, and enjoy helping others grow. 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 :)