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Sign up with Clera and we'll reach out the moment a role actually fits you — no more spraying applications into the void.
$108k–$140k/yr
Full-time
bachelor degree
Medical Insurance, Vision Insurance, Dental Insurance, Prescription Drug Coverage, Life Insurance, Legal Insurance
Posted 21d ago
~40 hrs/week
Responsibilities
Build and maintain large-scale, distributed API-driven systems using React JS, C#, and AWS to support major real estate brands. Lead software design, establish development standards, and evaluate emerging technologies to strengthen the platform.
Requirements
Requires a Bachelor's degree and 4+ years of experience in React JS, C#, and .NET Framework, along with 3+ years of SQL Server experience. Candidates must have a track record of building distributed systems and experience leveraging AI tooling in development.
Full job description
Software Engineer II, Data Management
<br>
Job Description
<br>
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 customer, our employees, and investors. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate.
As a CoStar Software Engineer on the Data Automation team, you will play a key role in expanding the data platform that supports all of CoStar Group’s largest brands including, CoStar Suite, LoopNet and Homes.com. You will deeply understand what drives the business for which you are building software. We firmly believe that what separates a good developer from a great one is a deep understanding of the business that they are supporting.
This position is located in Richmond, VA and offers a schedule of Monday to Thursday in office and the option to work from home on Friday.
Responsibilities
Build big, distributed, API-driven systems for tens of thousands of users
Produce bullet-proof code that is robust, efficient and maintainable; our primary tools are React JS, C#, .NET Framework, AWS (Dynamo/S3/Lambda), SQL Server
Drive and lead software design, development standards, code reviews.
Continually evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strength CoStar’s technology platform and develop practices.
Qualifications
Bachelor’s Degree from an accredited, not for profit, in person university or college
4+ years of experience in React JS, JavaScript
4+ years of experience in C#, .NET Framework & Web API 2.0 Development
3+ years of experience in MS SQL Server OR Database Design in T-SQL or PostgreSQL programming/performance tuning
Experience in architecting, designing and building large-scale distributed, services-oriented systems and web applications in an agile environment
Understanding of AI technologies and hands-on experience leveraging AI tooling in development (Claude Code, GitHub Copilot, Cursor, Gemini, Grok).
Data modeling experience
Track record of commitment to prior employers
Preferred Qualifications
Strong communication skills (to both business and technical partners)
Knowledge of cloud platforms (Azure or AWS)
Advanced SQL Querying
Data modeling experience from conceptual, logical and physical designs
Experience with RESTful web services
Experience leveraging ML technologies in production systems (Azure Machine Learning, AWS SageMaker, etc.)
Experience implementing LLM technologies into production systems (Azure AI Foundry, AWS Bedrock, etc.)
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 with internal training and tuition reimbursement.
Our benefits package includes (but is not limited to):
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)
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: $108,000 - $140,000 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.
#LI-KW1
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CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing
Related keywords
React JSC#.NET FrameworkAWSDynamoDBS3LambdaSQL ServerT-SQLPostgreSQLWeb API 2.0Distributed SystemsAgileClaude CodeGitHub CopilotCursor
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.
Offices: 1201 Wilson Blvd, Arlington, Virginia 22209, US · 181 Bay St, Suite 3420, Toronto, Ontario M5J, CA · 81, Rue Taitbout, Paris, Île-de-France 75009, FR · Calle de Serrano, 47, 13th Floor, Madrid, 28001, ES · 32 London Bridge, 26th Floor, The Shard, London, England SE1 9SG, GB
ResearchMarketingProduct DevelopmentAnalyticsCommercial Real EstateSalesReal Estateand TechnologyCommercial Real EstateAnalytics
Based on 7653 listings with disclosed salaries, most technology jobs in Virginia pay between $87k–$215k per year. Individual offers vary with seniority, company size, and specialization.
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