# Senior Security Software Engineer at Valar Atomics

- Company: Valar Atomics
- What the company does: Valar Atomics is scaling nuclear energy for heavy industrial power and clean hydrocarbon fuel production. Backed by Sequoia.
- Company website: https://www.valaratomics.com/
- Type: Startups
- Level: Senior
- Location: Torrance, California, United States
- Work setup: On-site
- Posted: 2026-09-08
- Apply by: 2026-10-23
- Apply: https://job-boards.greenhouse.io/valaratomics/jobs/4398511009
- Page: https://www.1752.vc/careers/jobs/valar-atomics-senior-security-software-engineer/

## About the role

Applicants must be legally authorized to work in the United States as a U.S. citizen or lawful permanent resident (green card holder).

## What they're looking for

- Participate in design and architecture discussions early, before implementation begins
- Perform lightweight threat modeling on new features and services — identifying trust boundaries, data flows, and likely attack surfaces
- Flag risky design patterns (auth schemes, data handling, third-party integrations, database access patterns) and recommend secure alternatives
- Provide security requirements and acceptance criteria that get built into planning/ticketing, not bolted on afterward
- C#, Python, React: Perform manual and tool-assisted secure code review across all three
- Postgres: Review queries and schema design for injection risks, access control issues, data exposure, and unsafe query patterns

Tags: IT & Enterprise Software