Software Engineer II, Data Management

Software Engineer II, Data Management

Job Description

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. We have been living and breathing the world of real estate information and online marketplaces for over 35 years, giving us the perspective to create truly unique and valuable offerings to our customers.

We’ve continually refined, transformed, and perfected our approach to our business, creating a language that has become standard in our industry, for our customers, and even our competitors. We continue that effort today and are always working to improve and drive innovation. This is how we deliver for our customer, our employees, and investors. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate.

As a CoStar Software Engineer on the Data Automation team, you will play a key role in expanding the data platform that supports all of CoStar Group’s largest brands including CoStar Suite, Loop Net and  You will deeply understand what drives the business for which you are building software. We firmly believe that what separates a good developer from a great one is a deep understanding of the business that they are supporting.

• Build big, distributed, API-driven systems for tens of thousands of users
• Produce bullet-proof code that is robust, efficient and maintainable; our primary tools are React JS, C#, .NET Framework, AWS (Dynamo/S3/Lambda), SQL Server
• Drive and lead software design, development standards, code reviews
• Continually evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strengthen CoStar’s technology platform and develop practices

• Bachelor’s Degree from an accredited, not for profit, in person university or college
• 4+ years of experience in React JS, Java Script
• 4+ years of experience in C#, .NET Framework & Web API 2.0 Development
• 3+ years of experience in MS SQL Server OR Database Design in T‑SQL or PostgreSQL programming/performance tuning
• Experience in architecting, designing and building large-scale distributed, services-oriented systems and web applications in an agile environment
• Understanding of AI technologies and hands‑on experience leveraging AI tooling in development (Claude Code, Git Hub Copilot, Cursor, Gemini, Grok)
• Data modeling experience
• Track record of commitment to prior employers

• Strong communication skills (to both business and technical partners)
• Knowledge of cloud platforms (Azure or AWS)
• Advanced SQL Querying
• Data modeling experience from conceptual, logical and physical designs
• Experience with RESTful web services
• Experience leveraging ML technologies in production systems (Azure Machine Learning, AWS Sage Maker, etc.)
• Experience implementing LLM technologies into production systems (Azure AI Foundry, AWS Bedrock, etc.)

• Comprehensive healthcare coverage:
  Medical / Vision / Dental / Prescription Drug Life, legal, and supplementary insurance
• Virtual and in person mental health counseling services for individuals and family
• 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)
• Access to CoStar Group’s Employee Resource Groups
• Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks

Base Compensation: $108,000 - $140,000 annually

CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug‑free workplace and perform pre‑employment substance abuse testing. CoStar Group is committed to creating a diverse environment and is proud to be an equal opportunity workplace and affirmative action employer. All qualified applicants will receive…