Senior Full Stack Developer

About the role Bittium SafeMove Comms is a quantum-safe, end-to-end encrypted communications platform for government agencies, defence forces, and critical infrastructure organisations. It covers voice, video, and messaging on Android, iOS, and Windows, and is built on a zero-trust architecture that customers can run on-premises, in air-gapped networks, in the cloud, or in isolated tactical environments. Within our Security business, we are looking for an experienced and versatile Senior Full Stack Developer to join Bittium Wireless Oy and the team that develops, deploys, and maintains SafeMove Comms across our entire customer base. The position is based in Oulu, Finland, and offers a hybrid working model. You will work on both client and server, and you'll have real influence on how the product evolves. When the situation calls for it, you'll take the technical lead, both within the team and together with our customers. We are a small team, and we see that as a real opportunity for you. You'll get to take ownership early, have a direct say in technical decisions, and learn faster than you would in a larger organisation, across clients, servers, security, and customer work. With that opportunity comes responsibility: you'll own what you build, and you should be comfortable handling the pressure that comes with work where our customers' security depends on us. What you'll do Develop SafeMove Comms desktop and mobile clients as well as server-side components Solve demanding integration and architecture challenges without losing sight of the user experience Take ownership of problems and drive them to working solutions, independently or together with the team Lead technical discussions with the team and customers when needed Take part in deploying and maintaining the product in demanding customer environments What we expect from you Solid experience in software development across both client-side and server-side technologies Strong software development skills and an agile mindset Good collaboration skills and the ability to solve demanding problems independently A willingness to take ownership and provide technical direction within the team and beyond Experience with desktop development using JavaScript/TypeScript and React, or with Android development Experience with server-side technologies such as Linux, Java, SQL databases, and Nginx Fluent Finnish and English We especially value Knowledge of network security Knowledge of the Signal Protocol or similar end-to-end encryption protocols Knowledge of PKI and certificate management Experience in iOS development Nice to have Broader expertise in information security and cryptography Experience with Rust, Redux, or Electron Interested? Send us your application as soon as possible. We will begin interviewing candidates during the application period. About Bittium Bittium specializes in the development of reliable, secure communications and connectivity solutions leveraging its 40-year legacy of expertise in advanced radio communication technologies. Bittium provides innovative products and services, customized solutions based on its product platforms and R&D services. Complementing its communications and connectivity solutions, Bittium offers proven information security solutions for mobile devices and portable computers. Bittium also provides healthcare technology products and services for biosignal measuring in the areas of cardiology and neurology. Net sales in 2025 were EUR 119.3 million and operating result was EUR 19.4 million. Bittium is listed on Nasdaq Helsinki Application period starts: 2026-10-19 08:00Application period ends: 2026-11-02 23:59