CoStar Group · 2 weeks ago
Senior Software Engineer (React/API)
CoStar Group is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. As a Senior 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.
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
Qualification
Required
Bachelor's degree required from an accredited, not-for-profit 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 programming/performance tuning
Experience in architecting, designing and building large scale distributed, services-oriented systems and web applications in an agile environment
Data modeling experience
A track record of commitment to prior employers
Preferred
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
Benefits
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 Diversity, Equity, & Inclusion Employee Resource Groups
Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks
Company
CoStar Group
CoStar Group (NASDAQ: CSGP) is the provider of commercial real estate information, analytics and marketing services.
Funding
Current Stage
Public CompanyTotal Funding
unknown1998-07-01IPO
Recent News
2026-01-09
2026-01-08
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