Senior Software Engineer- CoStar Suite- Arlington, VA
CoStar GroupBase Salary
$124k - $187k/yr
Responsibilities
- Architect scalable and resilient distributed systems, including service boundaries, data contracts, and cross-team API standards.
- Build responsive, high-performance web applications using React, Node.js, Tailwind, and related technologies.
- Develop AI-powered product experiences and establish AI-first engineering workflows, tooling, and practices.
- Work with cloud-native services, containers, and microservices while optimizing performance, observability, and developer productivity.
- Evaluate emerging technologies and strengthen CoStar’s technology platform and development practices.
- Mentor developers, support team upskilling, build consensus, and maintain knowledge of the commercial real estate industry and CoStar’s business model.
Requirements
- Bachelor’s degree from an accredited, not-for-profit, in-person university or college.
- At least 5 years of production development experience with modern technologies such as React, Vue, TypeScript, Node.js, C#, .NET, OpenSearch, Kafka, SQL, and NoSQL.
- Demonstrated success building and launching products and platforms and designing for high availability, horizontal scalability, and enterprise-scale observability.
- Experience with AWS or other cloud technologies and managed cloud services.
- Experience with Agile/Scrum processes, continuous delivery, unit testing, performance testing, and automation testing.
- Experience using AI to improve design, development, testing, and code review productivity.
- Preferred experience managing large enterprise codebases, code quality, dependencies, AI build agents and workflows, AI-powered product features, and C#, Node.js, or React.
- Excellent written and verbal communication skills; commercial real estate knowledge is a bonus.
Benefits
- The role is onsite in Arlington, VA Monday through Thursday, with the option to work from home on Friday.
- Comprehensive medical, vision, dental, and prescription drug coverage.
- Life, legal, and supplementary insurance plus virtual and in-person mental health counseling.
- Commuter and parking benefits, a 401(k) plan with matching contributions, and an employee stock purchase plan.
- Paid time off and tuition reimbursement.
- On-site fitness facilities or reimbursed fitness center membership costs, with yoga, Pelotons, personal training, and group exercise classes.
- Employee Resource Groups and complimentary gourmet beverages, fresh fruit, and healthy snacks.
Tech Stack
Categories
About CoStar Group
CoStar Group (NASDAQ: CSGP) is a global leader in commercial real estate information, analytics, online marketplaces, and 3D digital twin technology. Founded in 1986, CoStar Group is dedicated to digitizing the world’s real estate, empowering all people to discover properties, insights, and connections that improve their businesses and lives. CoStar Group’s major brands include CoStar, a leading global provider of commercial real estate data, analytics, and news; LoopNet, the most trafficked commercial real estate marketplace; Apartments.com, the leading platform for apartment rentals; Homes.com, the fastest-growing residential real estate marketplace; and Domain, one of Australia’s leading property marketplaces. CoStar Group’s industry-leading brands also include Matterport, a leading spatial data company whose platform turns buildings into data to make every space more valuable and accessible, STR, a global leader in hospitality data and benchmarking; Ten-X, an online platform for commercial real estate auctions and negotiated bids; and OnTheMarket, a leading residential property portal in the United Kingdom. CoStar Group’s websites attracted over 143 million average monthly unique visitors in the third quarter of 2025, serving clients around the world. Headquartered in Arlington, Virginia, CoStar Group is committed to transforming the real estate industry through innovative technology and comprehensive market intelligence. From time to time, we plan to utilize our corporate website as a channel of distribution for material company information. For more information, visit CoStarGroup.com.