Senior Avionics Test Engineer

Responsibilities

• to join our growing test team.
• In this role, you’ll focus on developing the test hardware, infrastructure, and platforms used to ensure our spacecraft hardware is built and performs to specification. You’ll work closely with electrical, mechanical, RF, software, and systems engineers to establish test requirements, develop test strategies, and troubleshoot flight hardware throughout development, qualification, production, and integration.
• This is a highly hands-on role for an engineer who is comfortable owning technical work independently, enjoys working directly with flight hardware and integrated test environments, and wants to have a significant impact on how Apex tests spacecraft at scale.
• Technical Work
• Own the design, build, integration, and maintenance of
• bus-level and component-level avionics test racks, including harness design, rack component selection, circuit design, and test infrastructure.

Develop and maintain

• FlatSats and avionics testbeds, including electrical interfaces, emulators, EGSE, harnessing, and supporting infrastructure.
• Lead hardware integration activities including harnessing, fixturing, rack integration, and mechanical/electrical interface validation.
• Define test architecture and strategies in collaboration with electrical, mechanical, RF, software, and systems engineering teams.
• Troubleshoot flight hardware and test setup failures using laboratory instrumentation including oscilloscopes, multimeters, power supplies, DAQ systems, VNAs, and vector signal analyzers/generators.
• Perform hardware bring-up, interface validation, signal integrity troubleshooting, and end-to-end system checkout.
• Develop test fixtures, breakout boxes, interface electronics, and other custom test hardware as needed.
• Support component qualification, acceptance, regression, and spacecraft-level testing.
• Investigate test failures and hardware anomalies, determine root cause, and work with responsible engineering teams to drive issues to resolution.
• Improve test infrastructure and processes to increase coverage, reliability, repeatability, and throughput.

Requirements

• 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.

Preferred

• Experience integrating or testing spacecraft, launch vehicles, avionics, or other flight electronics.

We’re looking for a

Senior Avionics Test Engineer,

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.

Experience with

• 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.
• Basic Python or scripting experience for test support, data collection, and automation.
• #LI-JC1

Why Join Apex?

Apex believes in creating a work environment that you look forward to embracing every day. Our employees love working at Apex, and we want you to love it too. We're a fast-growing startup that has raised more than $500M in funding, and we invest heavily in our people from day one.

Shared upside

Receive equity in Apex, letting you benefit from the work you create

Best-in-class healthcare

100% company-paid medical, dental, and vision for you and your dependents, plus $100k life insurance at no cost

Comprehensive PTO package

Starting at 15 days vacation, growing to 20+ days annually, plus 10 paid holidays

Competitive 401(k) plan

Generous matching - 100% match on first 3%, 50% on next 2%

8 weeks paid parental leave

Plus childcare reimbursement up to $350/day for work-related travel

Daily catered lunch and unlimited snacks

To keep you fueled throughout the day

Vibrant community

Monthly office socials, pickleball tournaments, run club, and gatherings for you and your family

Your dream desk setup

All the tools you need to be your most productive self

World-class Playa Vista office

With the benefit of in-person collaboration with amazing coworkers and flexibility to integrate work and life

Real impact opportunity

Work alongside experts from aerospace, new space, and other cutting-edge industries to make a lasting difference

Additional Information

Compensation ranges are set by role, level, location, and alignment with market data. A candidate's specific level and base pay are determined case by case and may vary with job-related skills, education, experience, technical capabilities, and internal equity. Beyond base salary, full-time hires are also eligible for long-term incentives in the form of stock options, along with medical, dental, and vision coverage and a 401(k) retirement plan.

ITAR Requirements

Apex's work is governed by U.S. export control laws, including the International Traffic in Arms Regulations (ITAR) and the Export Administration Regulations (EAR). To be eligible for this role, applicants must either (1) qualify as a U.S. Person, meaning a U.S. citizen or national, a lawful permanent resident (green card holder), a refugee admitted under 8 U.S.C. § 1157, or an individual granted asylum under 8 U.S.C. § 1158, or (2) be able to obtain the required export authorizations from the U.S. Department of State, the U.S. Department of Commerce, or another applicable U.S. government agency. You can learn more about ITAR here

Equal Opportunity Employer

Apex Technology, Inc. is an Equal Opportunity Employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. Candidates and employees are always evaluated based on merit, qualifications, and performance. We will never discriminate on the basis of race, color, gender, national origin, ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability, or any other legally protected status.