General Matter
Energy & UtilitiesDirect Greenhouse career site

Mechanical Engineer, Optomechanical Systems

Pay
$140,000 – $220,000 per year
Location
Los Angeles, CA · On-site
Job type
Full-time
Level
Mid-level
Listed
30 days ago

Skills & highlights for this role

  • mechanical design
  • precision optical mounts
  • thermal and vibration testing
  • materials selection

Also useful

  • materials science
  • metallurgy
  • failure analysis

Stated benefits & perks

  • Medical
  • Vision
  • Dental
  • 401k

About This Role

As a General Matter Mechanical Engineer, you will design, build, test, and own the mechanisms and mechanical structures enabling our next-generation enrichment technology - including precision optical and photonic subsystems, beam delivery hardware, and components that must survive demanding thermal, chemical, and material-compatibility conditions unique to uranium processing.

You will work closely with cross-functional teams, including electrical engineers, optical engineers, software engineers, chemical engineers, manufacturing engineers, nuclear engineers, materials scientists, metallurgists, and physicists. If you seek high impact and are excited by fast-paced, intense, Skunkworks-style projects at the frontier of enrichment technology, we encourage you to apply to join our team.

Responsibilities

  • Develop mechanisms and mechanical structures for enrichment - including precision mounts, alignment stages, beam delivery paths, or enclosures for optical and photonic subsystems - and own them through the entire product lifecycle including requirements definition, design, development, qualification, and release to production.
  • Select and specify materials and coatings for enrichment hardware based on mechanical, thermal, optical, and corrosion/wear performance requirements.
  • Support optimization of designs for cost, performance, and manufacturability.
  • Functionally test your hardware through thermal, vibe, shock, durability, etc., including precision alignment and beam pointing/stability testing for optical assemblies.
  • Perform root-cause analysis on test failures and develop hardware mitigations.
  • Collaborate with materials scientists and metallurgists to characterize material behavior under process-relevant conditions - including exposure to high-energy optical sources - and translate findings into design decisions.
  • Participate in design review and provide feedback to ensure design objectives are met.
  • Work closely with electrical, optical, software, manufacturing, and nuclear engineers to ensure designs are effectively integrated with overall system requirements.

Preferred Skills and Experience

  • Background or working knowledge in materials science or metallurgy, particularly failure analysis, material selection, or performance of metals/alloys under extreme thermal, mechanical, or corrosive conditions.
  • Experience designing precision mechanical structures for optical or photonic-based (e.g., alignment stages, athermal mounts, beam delivery paths, thermal management for high-energy optical components).
  • Strong understanding of engineering fundamentals.
  • Ability to perform trade studies and make clear recommendations using first principles and engineering fundamentals even with partial information.
  • Experience in a fast-paced engineering environment or a highly technical role requiring a resourceful, entrepreneurial approach to complete tasks within tight timeframes or budget constraints.

Additional Requirements

  • Ability to work extended hours and weekends as necessary.

Compensation and Benefits

The base salary range for this role is $140k-$220k annually.

Compensation bands are determined by role, level, location, and alignment with market data. Individual level and base pay is determined on a case-by-case basis and may vary based on job-related skills, education, experience, technical capabilities and internal equity. Please note that the stated salary range is an estimate and may be adjusted based on market conditions, business needs, or other factors.

In addition to base salary, for full-time hires, you may also be eligible for long-term incentives, in the form of stock options, and access to medical, vision & dental coverage as well as access to a 401(k) retirement plan.

About the Company

General Matter enriches uranium.

We are designing, building, and operating the world's lowest-cost enrichment services, here in the US.

In the process, we are restoring America's ability to produce nuclear fuel to power AI, advanced manufacturing and critical industries our country relies on to remain competitive.

Fuel drives the cost of advanced reactor electricity production, and enrichment drives the cost of the fuel that advanced reactors consume. Reliable, low-cost enrichment is the catalyst for the nuclear Renaissance now under way.

Our mission is to make nuclear not only the cleanest and safest source of baseload power, but also the most affordable. We believe abundant nuclear energy will lead to a post-scarcity society.

We were incubated inside Founders Fund, like Anduril and Palantir before us, and are backed by over a dozen of the world's top venture capital firms.

Our lean, world-class team of engineers and operators is applying a first-principles approach to solving the problem of nuclear fuel production.

We are a mission-driven company with a culture of urgency, accountability, and transparency.

Help us build a high-energy society by making the cleanest, safest form of baseload energy the most affordable.

Read the original posting

From General Matter's careers page, first listed on Rolev.ai on October 10, 2026. Rolev.ai is not the employer.

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Common questions

What is the salary for the Mechanical Engineer, Optomechanical Systems role at General Matter?

The Mechanical Engineer, Optomechanical Systems posting at General Matter states compensation of $140,000 – $220,000 per year. It is listed as a full-time position. Final pay may depend on location, experience, and interview evaluation on General Matter's official career site.

Where is the Mechanical Engineer, Optomechanical Systems job at General Matter located?

This Mechanical Engineer, Optomechanical Systems position at General Matter is located in Los Angeles, CA (On-site). Always check General Matter's application page for specific state eligibility or relocation policies.

What qualifications are required for Mechanical Engineer, Optomechanical Systems at General Matter?

For the Mechanical Engineer, Optomechanical Systems role, General Matter highlights experience with mechanical design, precision optical mounts, thermal and vibration testing, materials selection. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.

How do I apply for the Mechanical Engineer, Optomechanical Systems position at General Matter?

This listing links directly to General Matter's Greenhouse application page. You can apply directly on General Matter's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Greenhouse application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.