Senior Android Developer 80% - 100%

Key Responsibilities 

• Develop and maintain innovative features and modules in our mobile SDK, used by renowned public transport operators in the world.
• Collaborate closely with other engineers and product owners to design new capabilities that drive the ongoing evolution and enhancement of our platform.
• Engage directly with customers and partners, collaborating on projects to discuss, design and implement tailored solutions that address real-world challenges in mobility and marketing innovation.
• Champion code quality through regular reviews, automated testing, and continuous integration, ensuring that our solutions are reliable, secure and scalable.
• Play a key role in shaping and evolving our software design and development processes, contributing fresh ideas and improvements.
• Oversee and maintain comprehensive SDK documentation and developer tools, including our internal testing applications.
• Tackle complex issues with autonomy and collaborate with backend and DevOps teams.
• Continuously fine-tune the performance, security, and resilience of our SDK to maintain our edge in the competitive mobile landscape.
• Stay ahead of the curve by keeping up with the latest mobile OS updates, development tools, frameworks, and industry best practices.

Qualifications

• 5+ years of senior-level experience in Android (Java/Kotlin) development
• Deep expertise in Android frameworks and Google Play Services and a strong grasp of Android’s architectural principles
• Knowledge about location, motion and other sensor frameworks, including Bluetooth Low Energy (BLE)
• Experience with RESTful APIs, authentication (OAuth) and networking protocols
• Skilled in asynchronous programming, including multi-threading, reactive programming and background processing
• Comfortable with continuous integration and release pipelines and proficient in version control systems
• Solid background in automated testing, including unit testing
• Strong communicator and team player, comfortable working in a fast-paced, collaborative environment
• Experienced in agile methodologies, particularly Scrum
• Fluency in English is essential; German language skills are a plus

Bonus Skills

• JavaScript/TypeScript skills
• Experience with cross-platform frameworks (React Native, CapacitorJS, KMP, Flutter)
• iOS (Swift) development experience
• Full-stack experience (Java/Spring) and knowledge of the AWS ecosystem
• Experience with on-device machine learning models
• Experience with publishing apps to the Google Play Store and Apple App Store

Benefits

• Work in an international team, and with international customers
• Access to community and network
• Flexible working hours, 80%-100%
• 27 days of vacation per year
• Family-friendly environment
• Possibility to work from home
• Opportunity to travel
• Mobile phone and mobile plan allowance
• Free coffee, drinks, fruits and snacks
• Company breakfast twice a week, company lunch every 2nd week

Please send your cover letter and resume detailing your experience and relevant projects to . Please include links to any apps you have developed or contributed to.

We will not consider applications submitted by a recruitment agency. Candidates must get in touch with us directly.