Software Development Engineer in Test; SDET

Location: Reston, VA

Security Clearance: SECRET

We are seeking a mid-level Software Development Engineer in Test (SDET) to help build and mature the testing infrastructure supporting production software for simulation, optimization, and decision support in mission-focused environments.
This role is for someone who can develop robust test harnesses, mocking infrastructure, and automated and manual testing strategies.
A successful candidate will also help integrate testing into CI/CD pipelines and improve software quality and reliability across Java, Rust, and Type Script-based applications.
The strongest candidates will bring solid software development fundamentals, hands‑on experience with software testing and test infrastructure, and the technical judgment to build scalable, maintainable testing practices across a growing production codebase.

• Bachelor’s degree in computer science, mathematics, physics, applied math, or related field
• At least 3 years of industry experience
• Experience building test infrastructure including mocking and CI/CD pipelines
• Experience in software testing and test harness development
• Experience designing automated and manual testing
• Software Development experience in Java, Rust or Typescript/React
• Ability to work effectively with researchers, engineers, and end users to translate technical concepts into usable software
• Familiarity with full-stack web application development in any frameworks/languages
• U.S. CITIZENSHIP REQUIRED
• ACTIVE SECRET CLEARANCE

• Active TS/SCI Security Clearance
• Experience using ADO, Gitlab or similar CI/CD tools