About this role
LoopNet - Senior Software Engineer at Costar. Location: Irvine or Orange County. Role: building systems, mentoring engineers, designing APIs Requirements: Bachelor's degree, 7+ years production C#/.NET development, strong backend/API design, testing (unit/performance/end-to-end), mentoring experience, and familiarity with AI coding tools and cloud services. Category: Software Development Seniority: Senior Level Tools: C#, .NET, .NET Core, Claude Code, GitHub Copilot, Vue.js, React, TypeScript, MS SQL, MySQL, S3, SQS, DynamoDB, ElastiCache, Apache Kafka, Datadog, Docker, Kubernetes, CI/CD, BigQuery, Databricks, Snowflake, Python, Git Commitment: Full Time Workplace: Hybrid Languages: English