Test Engineer jobs in California

Shield AI

Full-time · San Diego, CA · $92,000 – $140,000

This role focuses on testing and validating autonomous flight systems across different unmanned aircraft platforms and environments, from simulation to actual flight operations. It suits early-career engineers who want hands-on experience with robotics, autonomy, and systems integration.

Listed on Shield AI’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $124,000 – $186,000

This role leads the planning and execution of complex test operations for rocket test systems, ensuring safe and reliable performance through procedure development, risk mitigation, and hands-on system operation. It suits experienced engineers who thrive in hands-on technical environments, can make critical decisions under uncertainty, and want to directly shape how a new rocket company validates its hardware.

Listed on Relativity Space’s careers site · Apply there ↗

FLIR Systems

Full-time · Goleta, CA · $120,300 – $160,400

This role involves testing and characterizing advanced infrared sensor components and assemblies in both laboratory and production environments, using specialized probing equipment and custom test software. It suits engineers with a strong background in electrical engineering and semiconductor testing who want hands-on technical work with mentorship opportunities.

Listed on FLIR Systems’s careers site · Apply there ↗

Crane Co.

Full-time · Burbank, CA · $95,000 – $138,584

Test Engineer position designing and developing automated test equipment for aerospace and defense applications, with hands-on work in both hardware and LabVIEW software development. Suited for engineers with 3+ years of relevant experience who enjoy solving complex testing challenges in a regulated manufacturing environment.

Listed on Crane Co.’s careers site · Apply there ↗

Astranis

Full-time · San Francisco, CA · $150,000 – $215,000

Design and maintain hardware-in-the-loop testbeds that validate satellite systems before flight, working across firmware, software, and physical hardware to ensure flight-representative test environments. This role suits engineers who enjoy both hands-on debugging and system-level architecture, collaborating with multiple teams to keep complex test infrastructure operational.

Listed on Astranis’s careers site · Apply there ↗

Shield AI

Full-time · San Diego, CA · $96,000 – $170,000

A test engineer role focused on battery energy storage systems for advanced aircraft, requiring hands-on characterization and verification work that bridges electrical, mechanical, and chemical engineering disciplines.

Listed on Shield AI’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $164,000 – $246,000

This role builds the integrated hardware-in-the-loop test system for a Mars spacecraft, taking it from concept through final flight validation. It suits engineers who excel at hands-on systems integration, debugging across hardware and software, and owning complex test infrastructure end to end.

Listed on Relativity Space’s careers site · Apply there ↗

Astranis

Full-time · San Francisco, CA · $150,000 – $215,000

This role focuses on designing and maintaining the hardware-in-the-loop testbeds that validate satellite systems before flight, requiring you to bridge hardware assembly, embedded systems, and software debugging across multiple engineering disciplines. You'll own the full lifecycle of test environments from initial design through troubleshooting, making it well-suited to an engineer who thrives working hands-on with both physical components and code.

Listed on Astranis’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $148,000 – $222,000

Relativity Space seeks an experienced avionics test engineer to design and execute testing strategies for RF and navigation systems on their Terran R rocket. You'll develop test infrastructure, work with design teams across component and vehicle levels, and support regulatory qualification activities for commercial launch operations.

Listed on Relativity Space’s careers site · Apply there ↗

Relativity Space

Long Beach, CA · $164,000 – $246,000

This role builds and operates an integrated hardware-in-the-loop test system for a Mars science orbiter, taking ownership of the complete validation environment from physical setup through flight readiness. You'll combine spacecraft hardware integration, software automation, and systems debugging to enable rapid, confident development across the engineering team.

Listed on Relativity Space’s careers site · Apply there ↗