Senior Software Engineer - SQL​/C#​/.NET

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 and the NASDAQ 100, 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 unique and valuable offerings to our customers. We continue that effort today and are always working to improve and drive innovation. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate.

You will be part of our finance technology team, tasked with enabling the payment processing functionality of our business. This role is pivotal in constructing new data pipelines and system integrations to ensure our CRM and Consumer Portals offer enhanced customer experience with real-time information and enriched data for millions of transactions, addressing performance and high fault tolerance.

This position is located in our Richmond, VA office and offers a schedule of Monday-Thursday in office and Friday remote.

• Lead technical discussions and make critical architectural decisions aligned with business goals.
• Design, develop, and maintain robust and scalable applications using the Microsoft .NET technology stack, SQL and other data tools.
• Implement solutions using modern architecture paradigms including microservices and event-driven systems.
• Ensure adherence to SOLID principles, design patterns, and clean coding standards.
• Collaborate with cross-functional teams, participate in code reviews, and mentor junior developers.
• Analyze business requirements and translate them into technical designs and development-ready specifications.
• Work across teams to standardize data transfer and storage.

• Bachelor’s Degree required from an accredited university or college.
• A track record of commitment to prior employers.
• 5+ years of professional experience in software development using strongly typed languages for server-side processing (e.g., C#, Go, Java, or Node with Type Script).
• Strong experience with MS SQL Server, including relational database design and performance tuning.
• Demonstrated experience building highly scalable software systems for volume processing and performance.
• Familiarity with microservices architecture and containerization (Docker and Kubernetes).
• Experience with AWS or similar cloud platforms (Azure, GCP).
• Strong understanding of CI/CD, infrastructure as code, automated deployment pipelines, and source control.
• Strong analytical and problem-solving skills with attention to detail and excellent communication skills.
• Experience in unit, performance, and automation testing.

• Experience with No
  
  SQL databases and API Gateway technologies.
• Familiarity with observability tools like Kibana, Data Dog and other monitoring frameworks.
• Hands-on experience with Entity Framework for data modeling and data access.
• Databricks, Python or other ETL processing experience.
• Experience with Elastic Search or Open Search.
• Payments experience is a plus.
• Experience with Identity & Access Management (e.g., OAuth, JWT).
• Exposure to serverless computing and event-driven architecture (Rabbit
  
  MQ, SQS, Kafka, Azure Service Bus).

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 generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training and tuition reimbursement.

• 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…