Application Developer

Senior Mobile Application Developer – Utrecht – ALTEN The Position As part of our expanding team, we are looking for a talented Senior Mobile Application Developer to join us in Utrecht and contribute to impactful, high-tech client projects. Your main tasks will include: Designing and developing a cross-platform mobile application for Android and iOS Contributing to the selection and implementation of the mobile technology stack Implementing Bluetooth Low Energy communication with physical equipment, including device discovery, connection management, pairing, bonding, and GATT operations Developing device monitoring, alarms, configuration, diagnostics, log retrieval, and maintenance functionalities Creating configurable application screens based on JSON descriptors Implementing secure local storage and offline application behavior Designing and refining mobile wireframes, navigation flows, and reusable UI components Ensuring secure coding, dependency management, and vulnerability remediation Supporting application packaging, signing, and publication on the Google Play Store and Apple App Store Profile Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field 5+ years of professional software development experience, with significant hands-on mobile application development Proven experience delivering applications for both Android and iOS Strong experience with a cross-platform mobile framework: React Native / TypeScript, or .NET MAUI / C# Hands-on experience with Bluetooth Low Energy (BLE) and physical device integration, including at least one significant BLE/IoT project Experience with offline-first mobile architectures, secure local storage, and JSON-based models Ability to create and refine mobile wireframes, navigation flows, and UI components without a dedicated UX/UI Designer Knowledge of Material Design and Apple Human Interface Guidelines Experience with secure mobile development practices, CI/CD, automated testing, and mobile release management Strong debugging and troubleshooting skills across mobile, OS, BLE stack, and connected equipment Professional working proficiency in English Working Conditions Lease car with fuel card Possibility of hybrid working Monthly net expense allowance 27 vacation days, with the option to purchase up to 10 extra vacation days Pension scheme with no personal contribution required Why Join Us? Exciting Projects Across Industries: Contribute to innovative solutions in high-tech, industrial, and embedded systems Diverse Client Portfolio: Work with both global leaders and emerging innovators in industrial and IoT sectors Career Development: Access to continuous training, mentorship, and opportunities to attend leading industry events Collaborative Culture: Join a team-oriented environment that values innovation, knowledge-sharing, and personal growth About ALTEN ALTEN is a world leader in engineering and technology consulting, with over 57,700 employees in more than 30 countries. We support major companies in their innovation, R&D, and digital transformation projects across sectors such as automotive, aerospace, energy, finance, life sciences, and telecommunications. Present in the Netherlands for over 20 years, ALTEN operates from its offices in Eindhoven, Capelle aan den IJssel, Apeldoorn, Groningen, and Amstelveen. Today, with a team of 600+ consultants, ALTEN offers a wide range of expertise across Engineering and IT fields. From Automotive to Railway, and Defence to Aeronautics, our experts deploy their knowledge to provide innovative solutions in a dynamic and forward-thinking environment.