Software Engineer

Senior Software Engineer- CoStar Suite- Arlington, VA Job Description Company 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. About CoStarSuite CoStar Suite is the global leader in commercial real estate information, analytics and news. Commercial Real Estate industry professionals around the globe use CoStar Suite to access the most comprehensive data to make decisions with confidence. CoStar Suite delivers immediate, verified commercial real estate information on over 5.9 million properties across every market. Learn more about CoStar. About the Role As CoStar’s next Senior Software Engineer, you will contribute to the build of a greenfield, enterprise-scale web application infused with AI, leveraging modern technologies and frontier models. Drive the development of AI-powered product experiences while shaping AI-first engineering workflows that redefine how software is built. This is a high-impact role to architect, innovate, and influence the future of intelligent applications at scale. This position is located in Arlington, VA and is in onsite Monday – Thursday, with the option to work from home on Friday. Responsibilities Architect scalable, resilient distributed systems — defining service boundaries, data contracts, and cross-team API standards for an enterprise-scale platform Build responsive, high-performance applications using React, Node.js, Tailwind, etc. Work with cloud-native services (Azure/AWS/GCP), containers, and microservices Optimize for performance, observability, and developer productivity LeverageAI Tooling & Automation (CI/CD, code generation, test generation) Influence and establish AI-first engineering practice (vibe coding, human-in-the-loop, debugging) EstablishAI Culture & Mentorship(team upskilling, lifecycle redefinition) Continually evaluate emerging technologies to identify opportunities, trends and best practices that can be used to strengthen CoStar’s technology platform and development practices Develop and maintain an in-depth working knowledge of the CRE Industry and CoStar’sbusiness model / technology Basic Qualifications Bachelor’s Degree required from an accredited, not for profit, in-person university or college. A track record of commitment to prior employers 5+ years of production developmentexperience inmoderntechnologies, like React, Vue, TypeScript,NodeJS, C#, .Net, OpenSearch, Kafka, SQL, NoSQL A demonstrable track record of building and launching successful products and platforms Experience designing for high availability, horizontal scalability, and production observability at enterprise scale Experience with cloud technologies like AWS, Cloud Managed Services, etc. Experience in Agile/Scrum processes, and Continuous delivery practices Experienced in unit, performance, and automation testing Experience leveraging AI to improve productivity (design, development, testing, review, etc.) Deeply understand what drives the business for which you are building software Take an active role in mentoring developers with ability to build consensus Preferred Qualifications and Skills Experience managing a large Enterprise level code base, code quality and dependencies Experience with C#, NodeJS, and/or React in particular Build Agents and Workflows using modern AI patterns Leverage Vibe coding to improve productivity and quality Experience implementing AI powered product features Excellent written and verbal communication skills Commercial Real Estate(CRE)knowledge is a bonus 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. 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: $124,000 - $187,000 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. CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing 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 37 years, giving us the perspective to create truly unique and valuable products and services. We’ve continually refined, transformed and perfected our approach to our business, creating a language that has become standard in our industry and for our customers. 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 committed to creating a diverse environment and is proud to be an equal opportunity workplace and affirmative action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. CoStar Group is also committed to compliance with all fair employment practices regarding citizenship and immigration status. If you are a qualified individual with a disability or a disabled veteran, you may request a reasonable accommodation if you are unable or limited in your ability to use or access as a result of your disability. You can request reasonable accommodations by sending an email to View email address on click.appcast.io. #J-18808-Ljbffr