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General Matter

Mechanical Test, Optomechanical Systems

General Matter · Los Angeles, CA

Posted 2 days ago · $110,000–$180,000

or apply directly on General Matter's site. We never take the application ourselves.

Is this posting real?

This role has been open
2 days
General Matter's roles stay open a median of 53 days
Reposted
No
Salary listed
Yes
99% of General Matter's roles list one
Ghost-job risk at General Matter
high
84 stale, 1 reposted of 138 open
Hiring momentum
156 roles opened in the last 90 days
↑ up vs. the prior 90 days
Last confirmed on the employer's board
2026-09-27

Measured from postings appearing on and disappearing from General Matter's own greenhouse board since 2026-08-03. Full hiring picture for General Matter.

About this role

As a Mechanical Test Engineer at General Matter, you will be responsible for building test infrastructure and executing test campaigns for mechanical hardware related to uranium enrichment technology. Your role involves designing and maintaining test fixtures, developing test plans, performing materials testing, and analyzing data to ensure hardware meets performance criteria. You will collaborate closely with various engineering teams to translate test results into design improvements.

Our read on this posting4.0out of 5
benefits
2/5
freshness
5/5
career value
4/5
role clarity
4/5
pay transparency
5/5

Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of General Matter as an employer.

What you need

  • Bachelor's degree in Mechanical Engineering or a related field
  • 3+ years of experience in mechanical test engineering, environmental test, or hardware qualification
  • Hands-on experience designing and building test fixtures and instrumented test setups
  • Working knowledge of environmental test methods (vibration, shock, thermal cycling, thermal vacuum, durability/fatigue)
  • Comfortable working directly with hardware in a lab environment, including troubleshooting instrumentation and data acquisition systems
  • Evidence of exceptional ability (prior projects, portfolio of work, completed products, etc)

Nice to have

  • Background or working knowledge in materials science or metallurgy, particularly failure analysis, fatigue/corrosion testing
  • Experience testing precision optical or photonic-based hardware
  • Experience with data acquisition systems, sensors, and test automation
  • Strong understanding of engineering fundamentals and statistical methods for interpreting test data
  • Experience in a fast-paced engineering environment or a highly technical role

What you get

  • Base salary range of $110,000–$180,000 annually
  • Eligibility for long-term incentives, in the form of stock options
  • Access to medical, vision & dental coverage
  • Access to a 401(k) retirement plan

Worth weighing

  • No specific mention of company culture or team dynamics
  • Role requires extended hours and weekends as necessary

Summarised from General Matter's posting. Read the full original.

Listed by General Matter on their greenhouse job board, last confirmed open on 2026-09-27. PitchMeAI is not the employer.

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