Avionics Engineer New London, United Kingdom

Lodestar's mission is to develop the first "Protect and Defend" capability for high-value space assets in orbit. Our flagship product, MITHRIL, is our hardware-agnostic, AI-enabled autonomy software suite that enables us to augment any off-the-shelf spacecraft with the ability to autonomously detect, characterise, and reversibly neutralise orbital threats. By building on the proven space heritage of our best-in-class satellite-bus partners and fully integrating MITHRIL into a single unified platform, we deliver an end-to-end, autonomous in-space bodyguarding service.

We are seeking a highly motivated Avionics Engineer to join our multidisciplinary team developing next-generation space systems. You will be responsible for designing, implementing, and validating advanced avionics architectures for autonomous platforms. This role offers the opportunity to work hands-on across the full lifecycle, from concept and simulation to hardware testing and on-orbit readiness.

• Perform PCB design, layout, simulation, and validation for high-speed and mixed-signal designs.
• Conduct hardware debugging and system-level testing using oscilloscopes, logic analyzers, and other lab instrumentation.
• Build, test, and maintain electrical harnesses and wiring assemblies for flight and development hardware.
• Collaborate closely with mechanical, systems and software teams to ensure seamless integration of avionics hardware into flight systems.
• Support environmental qualification and verification testing (EMC, vibration, thermal vacuum, etc.).

• BEng/MEng in Electrical Engineering, related field or equivalent experience.
• Proven expertise in PCB design, layout, and hardware bring-up/testing.
• Knowledgeable in high-speed interface design and signal integrity analysis.
• Skilled in hardware debugging, fault isolation, and performance characterization.
• Familiar with lab test equipment including oscilloscopes, DAQs, logic analyzers, and power supplies.
• Hands-on experience with electrical assembly, including soldering, crimping, and harness fabrication.

• Familiarity with NVIDIA SoCs.
• Hands-on experience with FPGA design and integration.
• Proficient with PCB simulation workflows, including signal integrity, power integrity, and EMC/thermal analysis.
• Background in space-rated electronics and high-reliability design practices, including radiation effects analysis, fault-tolerant architectures, and qualification processes for space systems.
• Competitive Salary (based on experience)
• Equity pool options
• Vibrant, open-plan office in London
• Private Medical Insurance
• Be part of a scrappy, dynamic, multidisciplinary, collaborative crew ?

For security reasons background checks will be undertaken prior to any employment offers being made to an applicant. These checks will include nationality checks as it is a requirement of this position that you be eligible to access equipment and data regulated by the United States' International Traffic in Arms Regulations.

Under these Regulations, you may be ineligible for this role if you do not hold citizenship of United Kingdom, Australia, Japan, New Zealand, Switzerland, the European Union or a country that is part of NATO, or if you hold ineligible dual citizenship or nationality. For more information on these Regulations, click hereITAR Regulations.