Mobile Developer (Android, Wear OS) (m/f/x) Berlin

Job description

Your Impact

To support our mission, we’re looking for a Mobile Developer with a strong focus on Android and Wear OS.

In this role, you will take ownership of developing and optimizing smartphone and smartwatch applications, pushing the boundaries of system-level integration and user experience.

You’ll collaborate closely with Product, Design, and Engineering to deliver seamless, high-impact features that make the Patronus watch even more powerful in supporting the independence and safety of elderly people worldwide.

This is a unique opportunity to work both at the app and OS level — from building delightful consumer-facing apps to exploring system customizations that enable next-generation functionality.

Your Mission

• Build and improve Android apps that delight users and enhance daily lives.


• Develop for Wear OS and Android smartwatches with seamless phone–watch synchronization.


• Dive deep into the Android system layer when needed: enabling root-level features, system integrations, and custom device behaviors.


• Explore and implement OS-level modifications, such as background services, optimized system processes, or device-specific enhancements.


• Optimize for performance, battery, and UX across mobile and wearable platforms.


• Collaborate cross-functionally with product, design, and engineering to bring high-impact features to life.


• Apply best practices for testing, CI/CD, and production monitoring to ensure reliability and scalability.

Your Talent

• Strong track record in Android development using Java/Kotlin.


• Experience building both smartphone apps and smartwatch/Wear OS apps.


• Hands-on experience with Android system modifications (AOSP, custom ROMs, OEM integrations, root-level access).


• Solid understanding of low-level Android concepts like permissions models, system services, and background execution limits.


• Strong debugging and performance profiling skills — at both the app and system level.

• Nice-to-have:


• iOS (Swift) development experience.


• Knowledge of cross-platform frameworks (Flutter, React Native, KMP).


• Strong sense for UX/UI design.


• Exposure to health or IoT domains.

Our Offer

🧘 Wellbeing:

• Urban Sports Club membership for your fitness


• Family & Friends Coupon for the Patronus watch


• 26 vacation days in the first year, 28 days in the second year, and 30 days from the third year onwards

📚 Learning & Development:

• Annual Learning & Development Budget


• Clearly structured Career Framework for your professional development


• 360-degree feedback sessions for continuous improvement

💰 Compensation:

• Exclusive corporate benefits for your advantage


• Discounts at restaurants near the office


• Freedom to choose your hardware

🏠 Mobility & Flexibility:

• Modern office in the vibrant district of Friedrichshain


• Job Ticket for a stress-free daily commute


• Up to 2 days per week of working from home

🙌 Company Culture:

• Regular company and team events strengthen our sense of community


• Team spirit over elbow mentality – achieving more together


• Contribute to developing a product that offers genuine societal value


• Quarterly company brunches to connect and celebrate

The simple way to live safely.

We are Patronus.

We are more than just a provider of smart emergency watches.

We are true visionaries.

As a modern healthcare start-up from Berlin with strong investors behind us, we are determined to improve the everyday lives of elderly people around the world, to make it safer and more independent.

That's what we achieve with our revolutionary Patronus watch.

Although not recognizable as an emergency device at first glance, it enables users to call for help easily and immediately, anytime and anywhere.

This way, we provide an extra dose of safety and we can save lives in the truest sense of the word.

However, the Patronus watch itself is only the door opener to develop numerous other groundbreaking products to improve the lives of older people, their relatives and their caregivers.

Our vision is to use the enormous possibilities of modern technology to provide the best possible healthcare for our customers.

In this way, we contribute to making the healthcare system more effective - and ensure a life worth living.

Sounds like the perfect job for you?
We look forward to your application and to getting to know you!

At Patronus, we are an equal opportunity employer and are committed to fostering a diverse and inclusive workplace.

We strive to create a friendly, safe, and welcoming environment for all our employees, regardless of ethnicity, gender, gender identity and expression, sexual orientation, disability and abilities of any kind, physical appearance, social background, marital status, age, or religion (or lack thereof).

In your application, we focus solely on your experience and motivation.

You decide which additional information you want to share (e.g., photo, marital status, religion, gender, nationality, etc.).

We value and treat all applications equally.

Even if you don’t meet 100% of the requirements, we still encourage you to apply.

Required Skill Profession

Computer Occupations