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Software Development Engineer in Test (SDET) - Secret clearance required

BlackFern RecruitmentReston, VA🇺🇸United StatesPosted 2 Sept 2026

Quick Overview

Seniority
Mid Senior
Work mode
Hybrid
Location
Reston, VA, United States
Posted
9 hours ago
RustJavaReactTypeScript

Job Description

ACTIVE SECRET CLEARANCE required.

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 TypeScript-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.
Required Qualifications

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
ACTIVE SECRET CLEARANCE

Desired Qualifications

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

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