About this role
Senior Software Engineer (C#/.NET) at CoStar Group. Location: Arlington, Virginia, United States. Role: building systems, designing solutions, integrating AI Requirements: 5+ years .NET (C#) experience, bachelor's degree, experience with large-scale distributed systems, cloud (AWS/Azure), RESTful APIs, telemetry/observability, and familiarity with LLMs or agent architectures. Category: Software Development Seniority: Senior Level Tools: C#, .NET, SQL Server, AWS, Web API, RESTful, ASP.NET MVC, Lambda, DynamoDB, SQS, LLMs, SQL Commitment: Full Time Workplace: Hybrid Languages: English