Costar Software Engineer Jobs (NOW HIRING)

Software Engineer II, Data Management
Job Description
Overview 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 customers, 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, LoopNet and Homes.com. 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. CoStar is investing heavily in artificial intelligence to accelerate software delivery, improve platform observability, automate research and business workflows, enhance product experiences through intelligent agents and skills, and improve data quality across enterprise systems. Successful candidates will demonstrate a willingness to learn, adopt, and apply AI technologies responsibly to solve complex business and engineering challenges. This position is located in Richmond, VA and the work schedule will be 4 days onsite with 1 day remote. Responsibilities Build big, distributed, API-driven systems for tens of thousands of users Design and implement AI-powered software solutions that enhance the customer experience, improve platform intelligence, and unlock new product capabilities across CoStar brands. Build and integrate AI skills, agents, tools, and intelligent workflows into internal systems and customer-facing applications. Utilize AI models to enhance monitoring, replayability, observability, and diagnostic capabilities to improve system reliability, accelerate problem resolution, and reduce operational risk. Implement telemetry-driven solutions that proactively identify anomalies, performance bottlenecks, and potential customer-impacting issues. Build intelligent automation solutions that streamline research workflows, improve information discovery, and increase operational efficiency across business functions. Collaborate with Product, Research, and Data teams to identify opportunities where AI-driven automation can create business value and improve decision-making. 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 strength CoStar's technology platform and develop practices. Qualifications Bachelor's Degree from an accredited, not for profit, in person university or college 4+ years of full stack software development experience building web applications using React.js, JavaScript, C#, .NET Framework/Web API 2.0, and relational databases (Microsoft SQL Server and/or PostgreSQL), including database design, SQL development, and performance tuning. Experience in 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, GitHub Copilot, Cursor, Gemini, Grok). Data modeling experience Familiarity with large language models (LLMs), prompt engineering, or agent-based architectures. Experience working with monitoring, telemetry, observability, or automated diagnostics platforms. Understanding of data quality principles, data governance concepts, and data-centric application design. Track record of commitment to prior employers Preferred Qualifications Strong communication skills (to both business and technical partners) Knowledge of cloud platforms (Azure or AWS) Advanced SQL Querying Experience with RESTful web services Data modeling experience from conceptual, logical, and physical designs. Experience implementing AI agents, workflow automation platforms, or intelligent search solutions. Experience applying AI-assisted software development practices to improve engineering productivity and code quality. Experience leveraging ML technologies in production systems (Azure Machine Learning, AWS SageMaker, etc.) Experience implementing LLM technologies into production systems (Azure AI Foundry, AWS Bedrock, etc.) What's in it for you? When you join CoStar Group, you'll experience a collaborative and innovative culture working alongside the best and brightest to empower our people and customers to succeed. We offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training, tuition reimbursement, and an inter-office exchange program. Our benefits package includes (but is not limited to): 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), with yoga studio, Pelotons, 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 The final salary or hourly rate offered for this role will fall within the range set forth below based on a variety of factors, including but not limited to, geographic location, skills, and competencies. Base Compensation: $108,000 - $140,000 annually We welcome all qualified candidates who are currently eligible to work full-time in the United States to apply. However, please note that CoStar Group is not able to provide visa sponsorship for this position. #LI-KW1
CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing