CoStar Group Tech Stack

Commercial and residential real estate data, analytics, and digital marketplace platforms

Real Estate Arlington, Virginia 5,001–10,000 employees Public Company

CoStar Group operates a portfolio of real estate marketplaces and data platforms serving 143M+ monthly unique visitors globally. The tech stack centers on React, TypeScript, C#/.NET, SQL, and Elasticsearch, with active adoption of React and Workday signaling modernization of the front-end and HR infrastructure. Heavy hiring in marketing (104 open roles) and sales (82) alongside active project work in 3D capture (Matterport, drone-based gaussian splats), virtual tours, and commercial property photography indicates a push to differentiate via spatial data and visual inventory across both residential (Homes.com, Apartments.com) and commercial (CoStar, LoopNet) segments.

Tech Stack 155 technologies

Core StackReact TypeScript C# Elasticsearch GraphQL JavaScript MongoDB SQL Server Power BI AWS DynamoDB AWS Lambda NET Core Git SQL OpenSearch ECMAScript CI/CD REST API .NET Framework SQL Server Profiler Azure DevOps Server Azure Matterport iPad DAST SAST JSON Web API Bash+125 more

AdoptingReact Workday

What CoStar Group Is Building

◆Challenges

Accounting compliance
Maintaining accurate real estate database
Capturing real-time market data
Incomplete commercial real estate data coverage
Reducing technical debt
Missing inventory coverage
Missing commercial property availability
Improving network efficiency
Building talent pipeline
Accurate tenant data capture

▲Active Projects

Virtual tours and floorplans for residential homes
Tracking construction projects
Virtual tours for homes.com and apartments.com
Gaussian splat views using drones
Commercial real estate data coverage
Integration of visual lease and costar real estate manager
Matterport 3d capture of properties
Floorplan photography
Commercial property photography coverage
Marketing support on homes.com and apartments.com

Hiring Activity

Steady370 roles · 120 in 30d

Department

Marketing

104

Sales

Engineering

Product

Research

Data

Design

Seniority

Mid

104

Senior

Junior

Manager

Director

Lead

Principal

Notable leadership hires: Sales Director, Events Lead, Inside Sales Director

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About CoStar Group

CoStar Group is a public company (NASDAQ: CSGP) headquartered in Arlington, Virginia, with 5,001–10,000 employees. The company operates a network of real estate information and transaction platforms, including CoStar and LoopNet for commercial real estate, Apartments.com and Homes.com for residential rentals, Matterport for spatial data and 3D capture, STR for hospitality benchmarking, Ten-X for commercial auctions, and regional portals including Domain (Australia) and OnTheMarket (UK). Revenue streams span subscription data services, marketplace transaction fees, and advertising. Active pain points include incomplete commercial real estate data coverage, capturing real-time market data, and maintaining accuracy across property inventory—core constraints that shape the roadmap for geographic expansion and data freshness initiatives.

HeadquartersArlington, Virginia

Company Size5,001–10,000 employees

Hiring MarketsUnited States, United Kingdom, Canada, Australia, Philippines, India, France, Peru

Frequently Asked Questions

What tech stack does CoStar Group use?

React, TypeScript, C#, .NET Core, SQL Server, Elasticsearch, MongoDB, GraphQL, AWS (Lambda, DynamoDB), Azure, Power BI, and Matterport 3D capture technology. The company is actively adopting React and Workday.

What is CoStar Group working on?

Virtual tours and 3D floorplans for residential properties, drone-based gaussian splat views, Matterport 3D capture, commercial real estate data coverage expansion, and property photography. Notable integrations include Visual Lease and CoStar Real Estate Manager.