Software Development Engineer In Test (Sdet)

Our Reston team is 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 QualificationsBachelor’s degree in computer science, mathematics, physics, applied math, or related fieldAt least 3 years of industry experienceExperience building test infrastructure including mocking and CI/CD pipelinesExperience in software testing and test harness developmentExperience designing automated and manual testingSoftware Development experience in Java, Rust or Typescript/ReactAbility to work effectively with researchers, engineers, and end users to translate technical concepts into usable softwareFamiliarity with full-stack web application development in any frameworks/languagesU.S. CITIZENSHIP REQUIRED; successful candidates will be subject to a security investigation and must meet eligibility requirements for access to classified informationDesired QualificationsActive DoD Security ClearanceExperience using ADO, Gitlab or similar CI/CD toolsPosition Location: Reston, VAThe selected individual(s) will be required to work from the Reston, VA officePerks and BenefitsMedical, Dental and Vision InsuranceAccompanying FSA and HSA optionsAdditional Voluntary BenefitsPaid Time Off9 Observed Holidays and 2 Floating HolidaysPaid Parental LeaveTuition ReimbursementRelocation AssistanceProfessional Development ReimbursementAnnual Salary ReviewsProfit Sharing401(k) Traditional and Roth OptionsGym and Fitness ReimbursementEmployee Assistance ProgramEmployee Referral Program

• 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; successful candidates will be subject to a security investigation and must meet eligibility requirements for access to classified information

Desired Qualifications

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

Perks and Benefits

• Medical, Dental and Vision Insurance
• Accompanying FSA and HSA options
• Additional Voluntary Benefits
• Paid Time Off
• 9 Observed Holidays and 2 Floating Holidays
• Paid Parental Leave
• Tuition Reimbursement
• Relocation Assistance
• Professional Development Reimbursement
• Annual Salary Reviews
• Profit Sharing
• 401(k) Traditional and Roth Options
• Gym and Fitness Reimbursement
• Employee Assistance Program
• Employee Referral Program