> Markdown version of [/jobs/ext/3153104-mobile-app-senior-developer](https://www.wearedevelopers.com/jobs/ext/3153104-mobile-app-senior-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Mobile App Senior Developer - **Company:** Kontron Transportation GmbH - **Location:** Wien, Austria (Remote available) - **Experience:** Expert - **Salary:** €55,000.0 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Android Software Development, Mobile Application Development, Profiling, Software Quality, Code Review, Collaborative Software, Communications Protocols, Computer Engineering, Data Security, Memory Management, Internet Protocol, Mobile Application Software, Network Protocols, Software Engineering, Transmission Control Protocol (TCP), User Interface Testing, WebSocket, WebRTC, Real-Time Transport Protocol, Kotlin, Information Technology, Low Latency, Atlassian Tools, Jetpack Compose, Video Streaming - **Published:** September 11, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=d3f4025fc6389a87 ## About the Role * Bachelor's or Master's degree in Computer Science, Computer Engineering, or a related technical discipline. * 5+ years of professional Android development experience with a track record of deploying complex, high-reliability applications to production. * Deep understanding of networking protocols (TCP/UDP, WebSockets, IP networking, QoS) and real-time media streaming. * Proven experience managing device power consumption, memory management, and performance profiling under constrained hardware limits. * Strong background in writing robust, testable code backed by comprehensive unit and UI testing frameworks with a sense of quality for clean code, testing, and code Reviews. * Passion for collaborating in an agile, interdisciplinary team while using our standard collaboration tools like Jira and Confluence. * Hands-on experience with 3GPP Mission Critical Services (MCX) or Land Mobile Radio (LMR) is nice to have * Familiarity with enterprise Mobile Device Management (MDM) rollouts is a plus * Prior experience in public safety, defense, aerospace, or industrial IoT software development is an advantage ## Description For our location in Vienna, we are looking for an experienced Senior Android Developer to architect, build, and maintain our next-generation Mission Critical Communications (voice, data and video). Will be integrated on the Mobile App Development team, working on new functions and features while adapting our flagship Mobile Applications to new devices ensuring the operation in high-stakes environments where reliability, latency, and security are paramount. Your tasks * Degree in Telecommunications, Computer Science, Electrical Engineering or a related technical discipline. * Design, build, and maintain high-performance native Android applications using Kotlin and Jetpack Compose, tailored for ruggedized mobile hardware and specialized handheld devices. * Architect and implement low-latency real-time audio/video streaming and communication protocols, including SIP, RTP, WebRTC, and 3GPP MCX standards (MCPTT, MCVideo, MCData). * Optimize background and foreground services to guarantee continuous connectivity, instant call setup times. * Implement rigorous data security practices, including end-to-end encryption (E2EE), and compliance hardening for public safety standards. * Establish rigorous testing standards, including automated unit, integration, and stress tests tailored for network jitter, packet loss, and low-battery scenarios. * Partner closely with our cross-functional engineering squads, seamlessly following our established development processes and agile workflows to keep our release cycles predictable and code quality high. ## Related Videos - [Location Verification without GPS?](https://www.wearedevelopers.com/videos/1184-location-verification-without-gps) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Profiling Symfony & PHP apps with Blackfire](https://www.wearedevelopers.com/videos/265-profiling-symfony-php-apps-with-blackfire) - [Transforming Education: A Journey from interactive Markdown to Remote-Labs](https://www.wearedevelopers.com/videos/941-transforming-education-a-journey-from-interactive-markdown-to-remote-labs) - [Enhancing Workload Security in Kubernetes](https://www.wearedevelopers.com/videos/356-enhancing-workload-security-in-kubernetes) - [Hello JARVIS - Building Voice Interfaces for Your LLMS](https://www.wearedevelopers.com/videos/1641-hello-jarvis-building-voice-interfaces-for-your-llms) ## Related Articles - [Cross Platform Mobile Development Frameworks to Use in 2025](https://www.wearedevelopers.com/magazine/404-cross-platform-mobile-development-frameworks-to-use-in-2025) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [The Biggest German Tech Companies](https://www.wearedevelopers.com/magazine/424-the-biggest-german-tech-companies) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Finding Jobs in Germany](https://www.wearedevelopers.com/magazine/375-finding-jobs-in-germany) - [System change: restart as developer?](https://www.wearedevelopers.com/magazine/39-system-change-restart-as-developer)