Senior Android Engineer

Senior Android Engineer

Babbel

Berlin, Germany

As a Senior Android Engineer in the NaviGator team, you’ll help shape the future of language learning in a flexible, inclusive environment. Working with a diverse group of motivated colleagues, you’ll collaborate across disciplines, share your expertise, and help build a scalable, maintainable app using both hybrid and native Android development.

We guide user navigation on both mobile and web, focusing on increasing learner retention with intuitive design and personalized recommendations. By owning the Learn and Practice tabs and using feedback and retention metrics, we ensure every learner enjoys a seamless, engaging experience tailored to their progress and interests.

You will:

• Deliver high-quality, scalable mobile apps by contributing to the discovery and delivery of new features on Android and web platforms;
• Be part of a user-focused team that builds end-to-end learning experiences;
• Collaborate cross-functionally to make informed decisions ranging from User Experience to API design;
• Participate in our knowledge-sharing culture: code reviews, pair programming, knowledge-sharing sessions, feature demonstrations;
• Maintain and proactively improve the overall technology stack and infrastructure of the Android app(s).

You have:

• Developed several Android apps using: Kotlin, Java, Jetpack libraries (Compose, Lifecycle, etc.), DI (Dagger), Room, Retrofit, WorkManager, Testing with Espresso, Mockito, and UI test;
• In-depth knowledge of design patterns, particularly MVVM and MVI architectures;
• You have experience with Coroutines/Flows and RxJava/RxKotlin;
• The ability to maintain and develop CI/CD pipelines, preferably with Fastlane, Bitrise, Github Actions;
• Expertise with AI tooling and infrastructure, including LLM-powered development tools (e.g., Cursor) and agentic AI systems, with the ability to apply them effectively to accelerate engineering workflows and improve productivity;
• Fluency in written and spoken English;
• Experience with how a deliberate setup of process and tooling can be used to ensure delivery of high quality software;
• Strong desire to learn new things and share knowledge with others;
• Experience in mentoring other engineers.

Nice to have:

• Someone who is a high senior with more hands-on experience and very good attitude and communication skills;
• Knowledge of Automation testing tools like Appium is a good Plus;
• Knowledge or prior experience with backend is a plus.