LoopNet - Senior Software Engineer

Loop Net - Senior Software Engineer

CoStar Group (NASDAQ:CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index, CoStar Group is on a mission to digitize the world's real estate, empowering all people to discover properties, insights and connections that improve their businesses and lives.

Loop Net, the most popular place to find a space, is the #1 global commercial real estate marketplace with more than 12 million unique monthly visitors. We are focused on expanding market share, innovating our products, and building a talented global team.

In this role, you will contribute to building scalable, high-quality systems across multiple products and brands—including  while leveraging modern AI-driven development practices to accelerate delivery and improve code quality.

You will play a key role in architecture decisions and mentoring engineers across the team.

Location:

Irvine, CA. 4 days a week onsite with 1 day work from home.

• Bachelor's degree from an accredited, not-for-profit university or college.
• A demonstrated track record of commitment with prior employers.
• 7+ years of production development experience with C# and .NET or .NET Core.
• Proven history of building and launching successful products and platforms.
• Experience delivering products that meet specifications and performance SLAs.
• Solid experience writing unit, performance, and automated end-to-end tests.
• Strong experience building APIs and backend systems with a solid grasp of software design principles.
• Deep understanding of the business context for which you are building software.
• Active participation in mentoring developers and building team consensus.

• Working knowledge of Vue.js or React in Type Script.
• Experience with relational database design (MS SQL or MySQL), including performance tuning.
• Hands-on experience with AWS services including S3, SQS, DynamoDB, and Elasti Cache, as well as Apache Kafka and Datadog.
• Experience with microservices, distributed systems, Docker, and Kubernetes.
• Familiarity with CI/CD pipelines, Dev Ops practices, and Infrastructure as Code tools.
• Application security knowledge and experience with Git-based workflows.
• Hands-on professional experience with AI coding tools such as Claude Code, Git Hub Copilot, or equivalent.
• Experience with cloud data warehouse platforms (Big Query, Databricks, or Snowflake) and proficiency in Python for data engineering or analytics workflows.

• Comprehensive healthcare coverage:
  Medical, Vision, Dental, Prescription Drug.
• Life, legal, and supplementary insurance.
• Virtual and in-person mental health counseling services.
• Commuter and parking benefits.
• 401(k) retirement plan with matching contributions.
• Employee stock purchase plan.
• Paid time off.
• Tuition reimbursement.
• On-site fitness center and/or reimbursed fitness center membership costs (location dependent), with yoga studio, Peloton, personal training, group exercise classes.
• Access to CoStar Group's Employee Resource Groups.
• Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks.