Job description
Team & Reporting Line: Mission and Space Segment - Reporting to Lead Satellite Systems
Our Mission
At constellr, we use thermal intelligence from space to understand what is happening on Earth - where, when and at scale. Our satellite constellation delivers high-resolution land surface temperature data, giving governments, defence organisations, commercial operators and global institutions the intelligence they need to monitor change, assess risk and make better-informed decisions.
From national security and critical infrastructure to agriculture and climate resilience, constellr turns temperature into actionable intelligence for a changing world.
Your Role
You will join the constellr Mission & Space Segment team, playing a key role in shaping the onboard software that powers our satellite constellation across its full lifecycle — from early design through to in-orbit operations.
This is a hands-on, high-impact role where you will help define how our satellites compute, behave, and evolve in space. Your work will directly influence the reliability, performance, and long-term success of constellr’s mission.
You’ll collaborate closely across the business — working day-to-day with internal engineering teams, Product Assurance, Project Management, and Operations, as well as external suppliers. Together, you will help turn mission concepts into robust, flight-ready software systems.
In addition to software development, you will contribute to system-level design decisions, support procurement and supplier technical alignment, and help ensure our onboard software is continuously validated, improved, and ready for operation in orbit.
Key responsibilities
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Design, develop, test, and maintain high-reliability onboard flight software in compliance with product assurance and safety standards.
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Collaborate with cross-functional stakeholders to define, refine, and manage software requirements across all onboard satellite systems.
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Contribute to the definition and evolution of onboard software architecture, supporting both laboratory-based validation environments and in-orbit operational systems.
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Develop and implement robust Fault Detection, Isolation and Recovery (FDIR) strategies to ensure resilience and autonomy of onboard systems.
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Support the planning, coordination, and delivery of new software features and upgrades, working closely with external suppliers and development partners.
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Champion strong configuration management practices across all onboard software components to ensure traceability, integrity, and control.
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Define and drive verification and validation strategies, ensuring comprehensive testing and high confidence in flight software performance.
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Participate in end-to-end verification and validation activities for onboard systems and flight software.
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Ensure all software—whether developed in-house or delivered by suppliers—meets stringent technical, safety, and quality requirements.
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Support investigation and resolution of software anomalies and non-conformance issues, contributing to continuous improvement and system reliability.
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Help define and enhance the in-orbit software update process for satellites within the constellation fleet.
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Contribute to integration and testing activities using Flatsat environments and other ground-based simulation and validation platforms.
Job requirements
About you
Required:
We’re looking for someone with strong engineering fundamentals and real-world experience building software for complex, safety-critical or aerospace systems.
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Degree in Aerospace Engineering, Software Engineering, Computer Science, or a related field
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Strong understanding of systems engineering principles and full software development lifecycles in complex technical environments
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At least 4 years of experience in software development or software assurance, ideally in aerospace or other safety-critical domains
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Experience with embedded software development, including familiarity with low-level hardware interfaces (e.g., CAN, Camera Link, or similar)
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Exposure to FPGA-based systems and familiarity with relevant ECSS standards (especially Q-ST-60-02)
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Solid grounding in software engineering principles, development methodologies, and lifecycle management tools
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Experience with software testing frameworks, tools, and processes
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Strong practical experience using Git and working within CI/CD pipelines
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Proficiency in Python and C++
Nice to Have_:_
These skills would further strengthen your profile, but are not essential:
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Familiarity with ECSS standards and handbooks, including:
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ECSS-E-ST-40C
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ECSS-E-HB-40A
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ECSS-E-ST-20-04C
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ECSS-Q-ST-80C
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ECSS-Q-ST-60-03C
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ECSS-Q-ST-30-02C
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ECSS-E-ST-70-11C
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ECSS-E-ST-70-41C
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ECSS-E-HB-40-02A
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Experience with space communication protocols such as CCSDS and CSP
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Strong analytical and structured problem-solving skills
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High attention to detail and a strong quality mindset
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Confidence in identifying inconsistencies and improving technical standards
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Clear communication skills and ability to work across multidisciplinary teams
Why join constellr?
- High-Impact National Security Mission: Be part of an ambitious mission to launch the world’s first commercial thermal infrared constellation, delivering sovereign-grade "behavioural" intelligence from space to close critical blind spots for defence, intelligence, and maritime surveillance agencies.
- Fast-Paced "New Space" Innovation: Work at the leading edge of a rapidly evolving defence sector. By leveraging modern, agile New Space methodologies, you will help design, build, and deploy dual-use thermal payloads into operational orbit at a speed and scale that traditional aerospace models simply cannot match.
- Broad Interdisciplinary Exposure: Accelerate your professional growth by collaborating daily with a diverse, international cohort of astrophysicists, software developers, and defence-system engineers.
- Inclusive & Scientific Culture: Join a high-trust team deeply committed to diversity, inclusion, and scientific excellence, where academic curiosity is paired with high autonomy and a flat hierarchy.
- Financial Upside & Well-being: Benefit from a Virtual Share Option Plan (VSOP) for permanent employees, giving you a true stake in the company's growth, alongside highly flexible hybrid working models.
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