Senior Software Engineer

Costar
Richmond, VA
Senior Software Engineer

Job Description

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 and the NASDAQ 100, 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 customers, our employees, and investors. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate.

We are seeking an accomplished Senior Full-Stack Software Engineer who excels at designing and architecting modern web applications. This engineer would support our Web Enterprise team in building the software tools that power our proprietary CRM platform and support our sales and research teams across Homes.com, CoStar.com, Apartments.com, LoopNet.com, and more.

This position is located in our Richmond, VA office and offers a schedule of Monday-Thursday in office and Friday remote.

Responsibilities

  • Build large-scale, distributed, API-driven systems for critical internal applications

  • Identify and resolve issues related to database performance and integrity

  • Design, document and implement efficient and scalable database structures

  • Drive and lead software design, development standards, code reviews and production releases

  • Collaborate closely with other Software Engineers across the organization.

  • Continually evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strengthen CoStar’s technology platform and development practices.

  • Willingness to take an active role in mentoring other developers.

Qualifications

  • Bachelor’s Degree required from an accredited, not for profit university or college

  • 5+ years of production development experience with .NET Core with the ability to integrate front-end components into a scalable, secure, and maintainable backend architecture

  • 3+ years of database design, T-SQL programming, and performance tuning experience

  • Production development experience using modern front-end frameworks (React, Vue, Angular)

  • Experience in architecting, designing and building event-driven applications in an agile environment

  • Excellent software development and engineering skills on large scale, mission-critical applications

  • Proficiency in unit and performance testing

  • A track record of commitment to previous employers

Preferred Qualifications

  • Experience with Document Data Systems (Dynamo, OpenSearch) a plus.

  • Comfortable working across the stack with Node.js on the server-side

  • Experience with AWS S3, Lambda, SQS, Kafka, Redis a plus.

  • Experience with Docker and container orchestration a plus.

  • Experience working on a SOX compliant team a plus

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, tuition reimbursement, and an inter-office exchange program.

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), 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

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-IZ1

CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing

Posted 2026-02-10

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