Sr Software Engineer / Active TS/SCI

Peraton•Washington, DC

20h•$135,000 - $216,000•Onsite

About The Position

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. 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.

Requirements

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/TypeScript production codebases.
Advanced skills in SQL Server, T-SQL, and performance tuning.
U.S. citizenship required.
Active Top Secret clearance with SCI eligbility and eligible to obtain a polygraph.

Nice To Haves

Experience with ElasticSearch 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.

Responsibilities

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.