Sr Software Engineer​/TS​/SCI

Minimum Qualifications

• 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.

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.