Sr Software Engineer​/TS​/SCI

About Peraton

Peraton is a next‑generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world’s leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace.

The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees solve the most daunting challenges that our customers face.

Peraton is currently hiring a Senior Full Stack Software Engineer (O&M) to support our Operations and Maintenance (O&M) team to support a mission‑critical enterprise application used by the federal government, ensuring reliability, security, and continuous modernization of a complex production environment.

Location: Washington, DC

In this role, you will sustain, optimize, and enhance a mature enterprise application. Your focus will be on stability, refactoring, troubleshooting, and implementing minor feature enhancements across Angular front ends and .NET Core microservices.

• Maintain and optimize existing .NET Core microservices and ASP.NET applications for high availability and performance.
• Troubleshoot, debug, and upgrade Angular‑based Single‑Page Applications (SPAs).
• Manage and tune SQL Server databases, including repairing stored procedures and improving query performance.
• Analyze legacy application logic to identify and resolve high‑priority bugs and production incidents.
• Apply security patches, performance improvements, and minor feature enhancements based on stakeholder needs.

• Bachelor’s degree in Computer Science, Engineering, or equivalent experience.
• 10+ years of hands‑on full‑stack engineering experience, with emphasis on O&M or legacy system maintenance.
• Strong back‑end expertise in C#, .NET Core, ASP.NET, and reverse engineering/debugging.
• Proven experience maintaining and refactoring Angular/Type Script production codebases.
• Advanced skills in SQL Server, T‑SQL, and performance tuning.
• U.S. citizenship required.
• Active Top Secret clearance with SCI eligibility and eligible to obtain a polygraph.

• Experience with Elastic Search for log monitoring and troubleshooting.
• Ability to maintain and update SQL Server Reporting Services (SSRS) reports.
• Familiarity with Ext JS for supporting older UI components.

Target Salary Range: $135,000 - $216,000. This represents the typical salary range for this position. Salary is determined by various factors, including but not limited to the scope and responsibilities of the position, the individual’s experience, education, knowledge, skills, and competencies, as well as geographic location and business and contract considerations.

Benefits: Peraton offers eligible employees a variety of benefits including medical, dental, vision, life, health savings account, short/long‑term disability, EAP, parental leave, 401(k), paid time off (PTO) for vacation, and company paid holidays. A full listing of available benefits can be viewed at

EEO: Equal opportunity employer, including disability and protected veterans, or other characteristics protected by law.