Senior Avionics Test Engineer

The role

You will develop test hardware, infrastructure, and platforms to ensure spacecraft hardware performs to specification. You will work with various engineering teams to establish test requirements, develop strategies, and troubleshoot flight hardware.

What you will do

• Own the design, build, integration, and maintenance of avionics test racks.
• Develop and maintain FlatSats and avionics testbeds.
• Lead hardware integration activities including harnessing and interface validation.
• Define test architecture and strategies in collaboration with engineering teams.
• Troubleshoot flight hardware and test setup failures using laboratory instrumentation.
• Perform hardware bring-up, interface validation, and system checkout.
• Develop test fixtures, breakout boxes, and custom test hardware.
• Support component qualification, acceptance, regression, and spacecraft-level testing.
• Investigate test failures and hardware anomalies to determine root cause.
• Improve test infrastructure and processes.

Required qualifications

• Bachelor’s degree in Electrical Engineering, Aerospace Engineering, Physics, or a related technical field.
• 7+ years of professional experience in aerospace hardware, avionics, electronics, or integrated hardware testing.
• Hands-on experience with laboratory instrumentation and hardware bring-up.
• Experience troubleshooting integrated electrical systems and complex test setups.
• Strong understanding of hardware integration, verification, and validation workflows.
• Ability to read and interpret electrical schematics, wiring diagrams, interface control documents, and technical requirements.
• Strong problem-solving skills and the ability to independently drive technical issues to resolution.
• Excellent written and verbal communication skills.
• Must be a U.S. Person (U.S. Citizen or Green Card holder) in accordance with ITAR requirements.

Nice to have

• Experience integrating or testing spacecraft, launch vehicles, avionics, or other flight electronics.
• Harness design and fabrication
• Test fixturing
• Environmental testing
• Vibration testing
• Component acceptance and qualification testing
• Experience in fast-paced aerospace production, manufacturing, or integration environments.
• Experience designing PCBs or developing prototype electronics.
• Experience conducting sensor functional testing, avionics channelization, or electrical interface validation.
• Familiarity with embedded communication interfaces such as CAN, RS-422/485, UART, SPI, I2C, or Ethernet.

Benefits

• Equity in Apex
• 100% company-paid medical, dental, and vision for you and your dependents
• $100k life insurance at no cost
• 15 to 20+ days vacation annually
• 10 paid holidays
• 401(k) plan with 100% match on first 3% and 50% on next 2%
• 8 weeks paid parental leave
• Childcare reimbursement up to $350/day for work-related travel
• Daily catered lunch and unlimited snacks
• Monthly office socials, pickleball tournaments, run club, and gatherings

Before you apply

• Must be a U.S. Person (U.S. citizen or national, lawful permanent resident, refugee, or individual granted asylum) or be able to obtain required export authorizations.

About the company

Apex manufactures satellite buses at scale using software, vertical integration, and hardware designed for manufacturing. The company is a fast-growing startup that has raised more than $500M in funding.