Le poste Software Developer – Space Systems
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The Space, Defence and Intelligence business unit in CGI is a true IT Systems Integrator. We work, build, and operate bespoke, technically complex, mission-critical systems which help our clients keep us all safe and secure. We bring innovation to our clients using proven and emerging technologies, agile delivery processes and our deep expertise across the breadth of space, defence, intelligence, aerospace and maritime, all underpinned by our end-to-end cyber capability. We work collaboratively with global technology companies, cutting edge SMEs and academia to deliver the optimal solution for each client.
CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named one of the ‘World’s Best Employers’ by Forbes magazine. We offer a competitive salary, excellent pension, private healthcare, plus a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner not just an employee. We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant. Join us and you’ll be part of an open, friendly community of experts. We’ll train and support you in taking your career wherever you want it to go.
CGI Space has an exciting opportunity for an experienced Software Developer to join the Resource Management (RM) Team, delivering and supporting mission-critical ground-segment software for a large-scale satellite communications enterprise. This role is well suited to a strong Java developer with a mathematical or physics background, who enjoys working on complex algorithmic problems within operational systems.
Profil recherché
Key Responsibilities
. Develop a thorough understanding of a complex, mission-critical operational system, including its algorithms, constraints, and real-world behaviours.
. Diagnose and resolve incidents across development, test, and operational environments, clearly communicating findings, mitigations, and workarounds to internal teams and client stakeholders.
. Use AGI STK to simulate operational scenarios, investigate anomalies, and validate system behaviour.
. Design, develop, and execute subsystem and integration tests using Python and Robot Framework, based on a deep understanding of system intent and expected outcomes.
. Produce detailed designs for future enhancements, contributing to effort estimates and technical planning.
. Implement software components in Java (primary), with exposure to C# and Angular where required for integration or user-interface elements.
. Deploy software to Linux-based environments, running deployment scripts and diagnosing build or runtime issues.
. Demonstrate new and enhanced capabilities to client stakeholders and support acceptance activities.
. Participate in an on-call support rota, contributing to service continuity and operational resilience.
. Contribute to knowledge sharing and documentation, supporting succession planning and reducing single-point dependencies within the RM team.
Required qualifications to be successful in this role
Essential skills:
. At least 5 years of recent, hands-on Java development experience in a commercial environment.
. Strong mathematical or analytical background (e.g. Mathematics, Physics, Astrophysics, Engineering or similar).
. Experience working across a full commercial software development lifecycle, including development, testing, release, and support.
. Ability to work effectively within complex systems where correctness, robustness, and performance are critical.
. Experience with Python and automated testing frameworks such as Robot Framework.
. Familiarity with AGI STK for simulation and analysis.
Desirable Skills:
. Experience working in Linux-based environments.
. Experience in Satellite Communications Ground Systems
. Experience using Spring (or similar Java frameworks).
. Exposure to C# and Angular in multi-technology systems.
. Experience producing detailed designs from high-level architecture.
. Experience with Git version control.
. Exposure to Spark or large-scale data processing frameworks.
#LI-FP1
Environnement de travail
Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you’ll reach your full potential because…
You are invited to be an owner from day 1 as we work together to bring our Dream to life. That’s why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company’s strategy and direction.
Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise.
You’ll shape your career by joining a company built to grow and last. You’ll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons.
Come join our team—one of the largest IT and business consulting services firms in the world.
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Software Developer – Space Systems
CGI
