Embedded Flight Software Engineer

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 Design, develop, test, and maintain high-reliability onboard flight software in compliance with product assurance and safety standards. Collaborate with cross-functional stakeholders to define, refine, and manage software requirements across all onboard satellite systems. Contribute to the definition and evolution of onboard software architecture, supporting both laboratory-based validation environments and in-orbit operational systems. Develop and implement robust Fault Detection, Isolation and Recovery (FDIR) strategies to ensure resilience and autonomy of onboard systems. Support the planning, coordination, and delivery of new software features and upgrades, working closely with external suppliers and development partners. Champion strong configuration management practices across all onboard software components to ensure traceability, integrity, and control. Define and drive verification and validation strategies, ensuring comprehensive testing and high confidence in flight software performance. Participate in end-to-end verification and validation activities for onboard systems and flight software. Ensure all software—whether developed in-house or delivered by suppliers—meets stringent technical, safety, and quality requirements. …