Senior Qt Developer / UI Engineer

The service provider will be part of an initiative to modernize a mission-critical software system used by the Belgian transportation operator to manage traffic and safety. The system is being re-engineered in iterations. The main focus of this role is the development and maintenance of the Qt-based user interfaces used within the system. The developer will contribute to both legacy components and modernized modules. Depending on experience, the service provider may take a developer and/or technical lead role within the team. Main responsibilities include:

• Analyze, design and implement UI features within the program
• Develop and maintain Qt-based user interfaces
• Create technical documentation for software modules and system components
• Contribute to design decisions and engineering practices

• Support the team throughout the full software development lifecycle Task examples The service provider must ensure that the allocated person can:

• Design and implement UI modules using Qt
• Ensure high precision and reliability in code due to operational impact on railway traffic
• Participate in safety and security-related activities such as TRA and FMEA
• Work comfortably in both high-level architecture and detailed design
• Produce design documentation and support implementation
• Contribute to engineering methodology, tools, and organization

• Demonstrate autonomy, initiative, and strong problem-solving capabilities Objectives The tasks cover multiple phases of the software development lifecycle (SDLC), including design, development, testing, and documentation. Competency Language skills: Dutch / French / English Software skills: Mandatory

• Expert knowledge of Qt / Qt Framework
• good C or Rust development experience
• Experience developing complex UI systems
• Linux development and debugging environment

• Git (version control and collaboration) Nice to have

• Rust
• Java
• Python

Experience in safety-critical environments or railway signaling systems is considered an asset. Soft Skills

• Meticulous and precise, especially in safety-critical contexts
• Strong communicator and team player
• Proactive in seeking information and proposing solutions
• Motivated, innovative and hands-on
• Ability to work autonomously in complex technical environments Practical: 2 interviews (1 via teams, 1 onsite) Quick feedback from the client during the process (!)