LoopNet - Senior Software Engineer
Core
Building scalable, high-quality systems and AI-driven development practices for LoopNet, the #1 global commercial real estate marketplace.
Role type
Senior Software Engineer (C#/.NET, AWS)
Builds
Scalable backend systems, APIs, and product features for LoopNet.com and other CoStar brands.
Domain
Commercial real estate technology, cloud infrastructure, and AI-assisted development.
Deliverable
production ML models | product features | infrastructure
Required skills
C#, .NET, .NET Core, AWS cloud development, AI coding tools (Claude Code, GitHub Copilot), API design, backend systems, software design principles, unit testing, performance testing, automated end-to-end testing, mentoring.
Preferred skills
Vue.js, React, TypeScript, relational database design (MS SQL, MySQL), AWS services (S3, SQS, DynamoDB, ElastiCache), Apache Kafka, Datadog, microservices, distributed systems, Docker, Kubernetes, CI/CD pipelines, Infrastructure as Code, application security, cloud data warehouse platforms (BigQuery, Databricks, Snowflake), Python for data engineering.
Technologies
C#, .NET, .NET Core, AWS, Vue.js, React, TypeScript, MS SQL, MySQL, Apache Kafka, Docker, Kubernetes, BigQuery, Databricks, Snowflake, Python, Datadog, GitHub Copilot, Claude Code.
Responsibilities
Contribute to building scalable systems across multiple products, play a key role in architecture decisions, mentor engineers across the team, build and launch successful products and platforms, write unit and performance tests, participate in building team consensus.
Seniority
Senior, hands-on IC with mentorship responsibilities.
