CoStar Tech Stack

Commercial real estate data platform covering 8.5M+ properties

Real Estate Arlington, VA 1,001–5,000 employees Founded 1987 Public Company

CoStar maintains a proprietary database of 8.5 million commercial real estate properties with manually verified data sourced from brokers, owners, and property managers. The tech stack is firmly Microsoft-aligned (.NET Core, C#, SQL Server, Azure), and the hiring velocity is accelerating—but the department mix reveals a critical imbalance: 31 of 41 open roles are in sales, while only 2 are in engineering and 1 in data. This sales-heavy hiring pattern, paired with active pain points around data quality, incomplete property records, and outdated imagery, suggests CoStar is prioritizing revenue expansion and international go-to-market over infrastructure scaling.

Tech Stack 20 technologies

Core StackC# SQL Server Azure DevOps React TypeScript Tailwind CSS Jest Webpack Active Directory Workday NET Core ASP.NET Core Git Azure DevOps Server React Testing Library Babel Windows macOS Azure Microsoft 365

What CoStar Is Building

◆Challenges

Maintaining high-quality data
Increasing listing exposure
Incomplete property data
Outdated imagery
Missing inventory updates
Expand reach in emerging markets
Drive measurable business results
Incomplete real estate database
International payroll compliance
Expatriate payroll processing

▲Active Projects

Crm platform development
Onthemarket portal development
World class user experience development
Developing otm portal
Commercial real estate data enrichment
Property imagery collection
Inventory updates for commercial properties
Launch planning for new features
Design multi-channel campaigns
Content & messaging development

Hiring Activity

Accelerating40 roles · 25 in 30d

Department

Sales

Engineering

Research

Data

Finance

Marketing

Ops

Product

Seniority

Mid

Senior

Director

Manager

Notable leadership hires: Sales Director, Director

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About CoStar

CoStar is a public company providing commercial real estate intelligence and tools to brokers, investors, and property professionals. Founded in 1987 and headquartered in Arlington, VA, the company operates a research-backed database covering over 8.5 million commercial properties with details verified by trained research associates. The platform serves customers across the United States, United Kingdom, Canada, and France. CoStar's product suite includes data lookup and discovery tools, a CRM platform, and the OnTheMarket portal for property listings. Revenue streams include property data subscriptions, listings, and lead generation services.

HeadquartersArlington, VA

Company Size1,001–5,000 employees

Founded1987

Hiring MarketsUnited Kingdom, United States, France, Canada

Frequently Asked Questions

What tech stack does CoStar use?

CoStar's core stack is Microsoft-based: .NET Core, ASP.NET Core, C#, SQL Server, and Azure cloud infrastructure, with React and TypeScript for frontend development and Azure DevOps for CI/CD.

How many commercial real estate properties does CoStar cover?

CoStar's database includes over 8.5 million commercial real estate properties with details verified through interviews with brokers, owners, and property managers.