Senior Software Engineer, Developer Productivity
Radiant Industries · El Segundo, CA
$158,000–$219,500
Jul 15, 2026
El Segundo, CA
Jul 21, 2026
What this job asks for AI summary
A senior engineering role focused on maintaining and improving high-performance computing infrastructure and scientific computing environments at a nuclear microreactor startup. Day-to-day work involves supporting simulation tools like Ansys, STAR-CCM+, and Abaqus, triaging HPC and Linux issues from cross-disciplinary engineering teams, and modernizing legacy systems across on-premises and AWS environments. Suits someone with a strong infrastructure and DevOps background who is comfortable operating at the intersection of software engineering and hard science.
Mid level · 4+ years · Los Angeles-Long Beach-Anaheim, CA · Bachelor's required · Full-time
Advertised as Senior, but the requirements read as Mid.
“or” means any one of them counts — you don't need all of them.
Posted 2 times — it's one opening, so apply once.
We read this from the posting text with AI. Skim the description below before ruling yourself out.
How this req sits in the market our data
Roughly 1,400 people in the Los Angeles-Long Beach-Anaheim, CA area plausibly meet what this posting asks for (software developers). range 360–1,800
Applicant volume Moderate — A normal amount of company. The rare requirements below are what will separate a shortlisted application from the rest.
Most people in this occupation already list these. Still required — just not what gets you shortlisted.
What the occupation pays Median $164,459 (middle half $130,334–$195,752).
Estimated from BLS employment for this occupation and area, per-skill prevalence across our listing corpus, and published wage benchmarks — as of Jul 28, 2026. It is a model, not a headcount.
Why we read it this way (8)
This role sits at the intersection of software engineering and HPC/infrastructure operations, making SOC classification genuinely ambiguous. The primary framing is developer productivity and scientific computing tooling (writing and shipping code), which points to 15-1252 Software Developers; however, a substantial portion of the day-to-day work involves operating and maintaining on-premises Linux/HPC infrastructure, which is characteristic of 15-1244. 15-1252 was chosen because the JD explicitly emphasizes building scalable tooling, contributing to build systems, testing frameworks, and deployment automation.
The advertised title is 'Senior Software Engineer', but the required experience floor is only 4+ years — consistent with a Mid-level role on most career ladders. Seniority is assessed as Mid accordingly.
Ansys, STAR-CCM+, and Abaqus appear in the Responsibilities section (not a formal requirements block) as specific tools the role must support. They are treated as hard gates because the role is explicitly defined around supporting these simulation environments.
AWS appears in the Responsibilities section as a platform the role actively partners to maintain; it is treated as a hard gate given the operational framing ('Partner with DevOps engineers to maintain systems across AWS and on-premises Linux environments').
All HPC-specific tools (SLURM, PBS, MPI, Lustre, EFS, AWS ParallelCluster, InfiniBand, Slingshot, AWS EFA) and container/orchestration tools (Kubernetes, Docker) appear under 'Desired Qualifications & Skills' and are marked preferred.
React and JavaScript are explicitly called 'a plus' within the Desired section and are marked preferred.
No compensation figures are stated in the posting.
The role is 100% onsite at El Segundo, CA (Los Angeles metro); remote=false.
Read the full posting
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