Senior Data Engineer; SQL Server- Arlington, VA

Senior Data Engineer (SQL Server)- Arlington, VA

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.

CoStar Group is seeking a Senior Database Engineer to join our Enterprise Data Services – Finance (EDS-F) team and help build and modernize the data platforms that power our financial systems. This is a hands‑on data engineering role, not a database administration position, where you’ll design data models, build and optimize data pipelines, tune complex T‑SQL, and develop scalable data quality solutions.

You’ll work across our established SQL Server environment supporting live financial operations and our emerging cloud data platform supporting analytics and new products. Working with large, complex financial datasets, you’ll focus on accuracy, traceability, performance, and scalability while partnering with Software Engineering, Product, DBA, Dev Ops, and Finance teams. Our technology stack includes SQL Server, Databricks, Snowflake, Kafka, NiFi, Airflow, Elasticsearch, and AWS.

This position is located in Arlington, VA and is in office Monday through Thursday and work from home on Friday.

• Design and build data models, data pipelines, and cloud data architecture on Databricks, Snowflake, and AWS.
• Build and maintain high-volume ETL/ELT pipelines for analytics, operational reporting, and product features.
• Design dimensional models and database structures that give fast and predictable query performance.
• Tune SQL Server workloads. This includes stored procedures, execution plans, and index strategy.
• Integrate data from internal and external sources into governed enterprise models.
• Build data quality, lineage, testing, monitoring, and observability frameworks.
• Optimize processing, storage, and query cost across large datasets.
• Apply SOX and audit controls to financial data pipelines. This includes change control, access control, and evidence capture.
• Automate data infrastructure and data collection across CoStar products.
• Support production pipelines. Find the root cause of failures and prevent a repeat.
• Contribute to architecture decisions, set engineering standards, and mentor other engineers.

• Bachelor’s Degree required from an accredited, not for profit, in person, university or college. Degree in Computer Science, Software Engineering, Information Systems, or a related technical field is preferred.
• A track record of commitment to prior employers
• 5+ years in data engineering, backend engineering, or software engineering, with a focus on data-intensive systems.
• Advanced SQL. Strong programming skills in Python, Scala, or Java.
• 3+ years with a relational platform such as SQL Server or PostgreSQL, including query and index tuning.
• 2+ years building production solutions on Databricks, Spark,…