Senior Avionics Engineer - L3

Sophia Space is a venture-backed deep technology company building high-performance, energy-efficient computing systems designed to operate in orbit. Our work sits at the intersection of aerospace systems, advanced computing, artificial intelligence, and applied physics, enabling a new generation of distributed edge computing capabilities in space. Having successfully completed our Seed financing, Sophia is focused on scaling its team, products, and capabilities as we prepare for the next stage of growth.

We are building a world-class engineering organization that combines expertise from aerospace, cloud computing, robotics, and AI to solve some of the most challenging problems in space infrastructure. As both a product company and an engineering-driven organization, we actively leverage modern AI tools throughout our development process to accelerate learning, improve productivity, and help deliver innovative, environmentally responsible computing platforms for the future.

Sophia Space is developing the Tile avionics platform that powers our orbital computing architecture. We are seeking a Senior (L3) Avionics Engineer to contribute to the design, analysis, integration, and verification of spacecraft avionics hardware supporting both command and data handling (C&DH) and electrical power system (EPS) functions. Working closely with the Avionics Lead, firmware engineers, PCB designers, systems engineers, and mechanical and thermal teams, this role supports development of embedded compute hardware, power electronics, board bring-up, and hardware integration activities.

The engineer will independently lead significant technical efforts within the avionics subsystem while contributing to cross-disciplinary spacecraft development from concept through qualification and flight.

This position is primarily in-person in Pasadena, California, with occasional hybrid flexibility based on business needs. This position requires access to technology that is subject to U.S. export control laws. To comply with applicable ITAR and EAR regulations, applicants must qualify as a U.S. Person, as defined under those regulations. U.S. Persons generally include U.S. citizens, lawful permanent residents (green card holders), and certain protected individuals as defined by applicable law.

• Design, analyze, and verify avionics hardware supporting spacecraft command and data handling and electrical power systems.
• Develop analog, digital, and mixed-signal circuitry supporting embedded computing, power distribution, and spacecraft interfaces.
• Support schematic development, PCB layout reviews, component selection, and design verification.
• Collaborate with firmware engineers to ensure robust hardware-software integration.

• Perform circuit analysis, control-loop evaluation, power integrity analysis, and hardware characterization.
• Validate designs using simulation, laboratory measurements, and subsystem testing.
• Support component derating, fault protection, grounding strategies, and electrical interface verification.
• Participate in subsystem trade studies balancing performance, reliability, manufacturability, and schedule.

• Support board bring-up, laboratory debugging, subsystem integration, and environmental qualification.
• Develop and operate avionics testbeds supporting functional verification and hardware characterization.
• Investigate hardware anomalies and perform root-cause analysis throughout development and testing.
• Support environmental qualification activities including TVAC, vibration, EMC, and system integration campaigns.

• Collaborate closely with systems, software, mechanical, thermal, manufacturing, and integration teams throughout spacecraft development.
• Support requirements development, interface definition, technical documentation, and major engineering reviews.
• Contribute to successful hardware delivery through disciplined engineering execution and effective technical communication.

• B.S. or M.S. in Electrical Engineering or related…