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HITL Test Engineer

Astranis
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San Francisco, CA$150k - $215kFull-timePosted 1mo ago

About the role

HITL Test Engineer at Astranis, responsible for designing, building, and maintaining hardware-in-the-loop (HITL) testbeds and flatsat systems to prove satellite hardware and software before flight.

Responsibilities

  • Own the full lifecycle of flatsat and HITL testbed builds, from initial design and BOM development through hardware procurement and software bring-up
  • Scope and design harnessing needs, coordinating with manufacturing to produce custom harnesses for flight-like hardware
  • Serve on a rotating on-call point of contact for testbed health, triaging anomalies and managing access for other engineers
  • Diagnose and resolve hardware and software failures on the testbed, spanning firmware interfaces, flight software, and physical components
  • Drive testbed architecture decisions, including hardware allocation tradeoffs and risk mitigation for testbed contention
  • Expand simulation capabilities as new satellite blocks come online, integrating motor emulators and deployment simulators
  • Develop tooling to improve testbed observability, monitoring, and automated operations
  • Assist in recruiting, interviewing, and hiring additional teammates to our rapidly-growing team

Qualifications

  • Bachelors degree in EE, AE, CS (or equivalent background knowledge)
  • 2-5+ years of experience in hardware integration, systems bring-up, or test engineering
  • Comfort working across hardware and software, from rack assembly to debugging Python tracebacks
  • Experience with embedded systems, proprietary test hardware, or laboratory hardware like logic analyzers and oscilloscopes
  • 2+ years of experience with Python (or equivalent high-level scripting language) for test automation
  • 1+ years of experience with Linux and shell command line tools
  • 1+ years of experience with version control systems (git or equivalent)
  • Experience reading schematics and debugging circuits that interface with embedded software
  • Strong debugging instincts and a methodical approach to documenting novel failures
  • Excellent written and verbal communication skills
  • A passion for building things, including working in a fast-paced environment and hands-on development

Skills

Required:Bachelors degree in EE, AE, CS (or equivalent background knowledge)Hardware integrationTest automation with PythonLinuxVersion controlEmbedded systems / test hardwareSchematics reading & circuit debuggingCommunication skillsHands-on development & fast-paced environment

Benefits

  • equity
  • robust benefits including high-quality company-subsidized healthcare, disability and life insurance, 401(k) retirement planning, flexible PTO, and free on-site catered meals
Last updated Oct 21, 2026. Interested? Apply on the company site.
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About Astranis

Advanced satellites for high orbits.

Astranis builds advanced satellites for high orbits, expanding humanity’s reach into the solar system. Today Astranis satellites provide dedicated, secure networks to highly-sophisticated customers across the globe— large enterprises, sovereign governments, and the US military. With five satellites on orbit and many more set to launch soon, the company is servicing a backlog of more than $1 billion of commercial contracts. Astranis is the preferred satellite communications partner for buyers with stringent requirements for uptime, data security, network visibility, and customization. Astranis has raised over $750 million from some of the world’s best investors, from Andreessen Horowitz to Blackrock, and Fidelity, and employs a team of 450 engineers and entrepreneurs. Astranis designs, builds, and operates its satellites out of its 153,000 sq. ft. headquarters in Northern California, USA.

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