Lead Software Engineer

- Lead 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 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 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 is the owner of , Land Watch, Land and Farm, and Acre Value and is the leading operator of online marketplaces that support the sale and purchase of farms, ranches, country homes, and rural land. Our customers include real‑estate brokers, agents, owners, and investors who need internet listing services and information to help them sell/purchase properties and track competitive trends.

The Land team is seeking a full‑time Lead Software Engineer to architect and maintain new systems, and drive improvements to existing systems and processes. The ideal candidate will have multiple years of experience developing and maintaining highly performant web applications that will be beneficial in driving the growth of our Land business unit.

Requirements: problem‑solving, collaborative, deep technical skills, ability to work in a secure, performant, enterprise‑scale environment. This position is located in Austin, TX and offers a Monday‑to‑Thursday office schedule with the option to work from home on Friday.

• Maintain and improve existing systems
• Develop and maintain database design and SQL scripts
• Work in partnership with Product and Technology leadership to deeply understand a project’s complex functional requirements and drive implementation of appropriate technical solutions
• Analyze technical requirements to design/improve architecture, systems, services, and components to meet functional, performance and availability requirements
• Apply software design patterns, sound quality management methods, tools, and techniques to create and support defect‑free application software that meets the needs of the organization with high reusability and maintainability
• Drive and evangelize architectural principles and guidelines to ensure high quality, consistent results across teams
• Leverage AI‑Assisted development tool to accelerate implementation, refactoring, and test creation, while ensuring correctness, security, and maintainability through strong engineering judgment

• Bachelor’s degree in Computer Science or related field from an accredited, not‑for‑profit, in‑person college/university
• Commitment to prior employers
• 8+ years of development experience in a production environment
• Expert‑level knowledge of systems using C#, .NET Development
• Expert‑level knowledge and experience using SQL
• Experience with software testing (Unit, Integration, Functional, Performance)
• Experience with AI‑assisted coding tools (e.g., Microsoft CoPilot or similar) to improve developer productivity
• Ability to clearly communicate thoughts and ideas within and across teams
• Ability to work well with other developers and management
• Ability to juggle priorities and work with minimal supervision or assistance to complete tasks

• Experience with Visual Studio, SSMS, and Azure Dev Ops or Git
• Experience with AWS and Open Search/Elasticsearch
• Experience architecting systems using C#, .NET Development
• Experience establishing software development best practices, including standards, code reviews, source control, builds, testing and operations