android developer for secure messaging

BWI GmbH supports the digital future-readiness of the Bundeswehr by ensuring reliable IT operations and advancing its digitalization.

• Design and develop central, complex features for BundesMessenger using Kotlin and modern Android frameworks;
• Shape and design a robust, scalable, and secure Android app architecture;
• Provide technical support to the team on complex issues and promote active knowledge sharing;
• Establish and implement high standards for code quality, unit/UI testing, and security;
• Act as a technical contact and sparring partner for product management, architects, and other teams.

• Extensive, proven experience in native Android development with Kotlin, Jetpack Compose, Android Views, and Java;
• Experience designing and implementing complex app architectures such as MVVM, MVI, and Clean Architecture;
• Deep knowledge of Android frameworks, concurrency with Coroutines/Flows, memory management, and mobile databases such as SQLite;
• High standards for Clean Code, automated unit/UI tests, and CI/CD processes;
• Strong understanding of mobile security, encryption, and secure data storage;
• Experience with Rust in combination with Kotlin/Java, for example via JNI or UniFFI;
• Nice to have: experience with the Matrix protocol and end-to-end encryption.

• Salary ranges from 71.000 € to 104.040 €, with the actual amount based on responsibilities, experience, and competencies;
• 30 Days of annual leave plus one traditional holiday and options for individual adjustments;
• Monthly benefit allowance through a benefits app;
• Tax benefits for public transport tickets;
• Flexible arrangements such as mobile working and trust-based working hours;
• Individual professional and personal development measures;
• Free access to LinkedIn Learning;
• Bicycle leasing for up to two bicycles through the JobRad program.