Senior Test Engineer, Mechanical/Fluids
Location
El Segundo, CA
Employment Type
Full-time
Posted on September 13, 2026
Location
El Segundo, CA
Employment Type
Full-time
Posted on September 13, 2026
Radiant is an El Segundo, CA-based startup developing portable nuclear microreactors. They are seeking a Senior Test Engineer to lead test operations for their innovative nuclear technology, collaborating with a multidisciplinary team in a fast-paced environment.
This employer didn't publish a rate. For reference, welding jobs in El Segundo, CA currently run a median of $38/hr in our index, with the middle half of them falling between $38–$58/hr across 19 postings with published pay. That median is a reasonable floor to anchor on when a recruiter asks what you're looking for.
We're tracking 23 other active welding openings in El Segundo, CA right now, from 10 different employers. 19 of them were added in the last week. Across California as a whole we're tracking 623 other active welding openings from 288 employers. A metro this active generally means you have real leverage — employers here are competing for the same welders. Browse every welding job in El Segundo, or widen the search to California.
Radiant currently has 3 other openings live in California, which is usually a sign of either steady growth or steady turnover — worth asking which in the interview.
The most active employers in California at the moment, by number of open welding reqs, are SpaceX (34), Vast (22), and Relativity Space (20). Volume like that usually means either a genuine expansion or a staffing agency working several client sites — worth knowing which before you apply.
Within California, the best-paying metros we track by median hourly rate are Redondo Beach at $71/hr, Long Beach at $54/hr, and Torrance at $43/hr. If you can relocate or commute, that spread is worth factoring in.
Pay figures are medians computed from live postings in the Welding Pros index, not from survey data, and they move as employers post. Senior Test Engineer, Mechanical/Fluids figures were last recalculated when this page was built.