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Senior Android Engineer, AdTech (m/f/d)

Redcare Pharmacy

As a Senior Mobile Engineer (Android/iOS) , you will play a key role in building the next generation of Retail Media and sponsored advertising experiences within the Redcare mobile platform.

About Redcare Pharmacy

  • Click here to learn more.
  • As Europe’s No.1 e-pharmacy, Redcare Pharmacy is powered by passionate teams and cutting-edge innovation.
  • We strive to create a healthy, collaborative work environment where every employee feels valued and inspired to contribute to our vision “Until every human has their health”.
  • If you’re seeking a career that offers purpose and aligns with your values, join us and begin your #Redcareer today.
  • Kotlin, Android SDK, Jetpack Compose, Android Jetpack (ViewModel, Navigation, DataStore), Coroutines & Flow, Hilt (Dagger), Retrofit/OkHttp, Ktor, Koin.

Responsibilities

  • 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 .
  • 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.
  • Working as part of a cross-functional product team, you will design and build scalable mobile experiences that seamlessly integrate sponsored products, personalized recommendations, native advertising, and campaign-driven customer journeys while maintaining a best in class shopping experience..
  • You will have high visibility and a direct impact on how our Android ecosystem evolves as we scale.
  • You'll collaborate closely with Product Managers, Designers, Backend Engineers, Data Scientists, and Retail Media stakeholders to deliver performant, scalable, and customer-centric mobile solutions used by millions of customers across Europe.

Requirements

  • Extensive experience in Android development with strong expertise in Kotlin.
  • Deep understanding of the Android SDK and modern Android development practices.
  • 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.

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.
  • Get quick and professional help from psychologists of Likeminded if you feel overwhelmed in private or professional life.
  • Anonymous and free of charge.
  • We provide our employees with a fully costed Deutschland Ticket which can be used at any time.
  • Grow!
  • We support and encourage your individual development through various in- and external trainings.
  • And many more :)

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.

Any cross platform is add-on

Every job at Redcare Pharmacy