Principal ADA Developer
Contract Type Freelance
Ideal Start Date 01/09/2027
Duration of Contract 9 years (Initial Term of 3 years three optional 2-year renewal periods)
Location 3 days onsite per week in Brussels – Haren
Sector Air Traffic Management (ATM) / Aviation sector
Also open to discuss a permanent position for the right candidate.
Atos is looking for a Principal Ada Developer to lead development on high-reliability, safety-critical software. This is a role for someone who enjoys getting the details right when the stakes are high.
What you'll bring
- 8 years of hands-on Ada development experience
- Deep knowledge of Ada (2005/2012/2022), including tasking, real-time programming, strong typing, and modular design
- Understanding of system architecture, performance optimisation, and safety-critical development standards (e.g. DO-178B/C, MISRA)
- Comfortable with Ada tooling (GNAT, SPARK), Git, and CI/CD for high-reliability systems
- Experience with unit testing (AUnit) and formal verification (SPARK), plus integration with databases or external systems
- Able to lead technical design and architecture for Ada-based applications
Nice to have
- Experience architecting safety-critical or real-time systems (aerospace, automotive, or defence)
- SPARK formal verification or real-time operating system (RTOS) integration
- Track record leading agile teams on large projects in regulated industries
Education & languages
Degree in Computer Science, Software Engineering, or equivalent hands-on experience.
English (C1).
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