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Senior Software Security Engineer

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Senior Software Security Engineer in USA

  • Valar Atomics
  • Full time
  • Email
  • Torrance, CA

Responsibilities

  • Participate in design and architecture discussions and perform lightweight threat modeling for new features and services.
  • Identify risky authentication, data handling, integration, and database patterns and recommend secure alternatives.
  • Define security requirements and acceptance criteria for engineering planning and ticketing.
  • Conduct manual and tool-assisted secure code reviews across C#, Python, React, and Postgres.
  • Identify vulnerabilities including injection, access control issues, data exposure, XSS, insecure deserialization, improper input validation, authorization flaws, and unsafe dynamic code.
  • Provide clear remediation guidance directly to engineers.
  • Support CMMC 2.0 alignment for applicable contracts and data handling requirements.
  • Maintain secure coding guidelines, track recurring vulnerability patterns, and contribute to developer training.
  • Partner with engineering leads to balance security rigor with delivery timelines.

Requirements

  • Professional experience in application security, software security engineering, or a related security-focused engineering role.
  • Strong proficiency reading and reasoning about C# and Python code.
  • Working knowledge of React and common front-end and web security issues.
  • Experience reviewing Postgres or other relational database queries and schemas for security issues.
  • Experience conducting security reviews during both design/planning and code-review stages.
  • Familiarity with the OWASP Top 10, secure design principles, and basic threat modeling such as STRIDE.
  • Strong written and verbal communication skills for explaining security tradeoffs to technical and non-technical stakeholders.
  • Preferred experience in a large-scale technology company or defense industrial base environment.
  • Familiarity with CMMC 2.0, DFARS, NIST 800-171, or similar federal and defense compliance frameworks.
  • Preferred CSSLP, GWAPT, GSSP, CISSP, OSCP, or Security+ certification.
  • Experience with SAST/DAST tooling, CI/CD security checks, SBOM and software supply chain security is a plus.
  • Familiarity with AWS or Azure environments is a plus.

Benefits

  • Competitive base salary of $175,000–$200,000 USD.
  • Equity ownership in a rapidly growing advanced energy company.
  • Comprehensive medical benefits.
  • Unlimited PTO.
  • Free daily lunch and dinner provided onsite.
  • Generous PPE stipend.
  • High-impact startup environment with significant ownership and autonomy.
  • Opportunities for rapid career growth and internal advancement.
  • Direct collaboration with experienced operators, engineers, and industry leaders.

Salary: $175k - $200k/yr

Valar Atomics

Valar Atomics develops factory-built, high-temperature nuclear systems and related fuel fabrication to provide industrial process heat and synthesize gas from air for hydrogen and manufacturing uses. Founded in 2023 and headquartered in El Segundo, California, it is privately held and building it...

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