Demo

Senior Front-End Developer

CoStar Group
Arlington, VA Full Time
POSTED ON 11/14/2025
AVAILABLE BEFORE 1/7/2026
Overview

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.

CoStar

CoStar is the global leader in commercial real estate information, analytics and news. Commercial Real Estate industry professionals around the globe use CoStar to access the most comprehensive data to make decisions with confidence. CoStar delivers immediate, verified commercial real estate information on over 5.9 million properties across every market.  

Learn more about CoStar. 

As CoStar’s next Senior Software Engineer, you will have a direct impact on highly visible CoStar Suite web applications that touch millions of users. You continuously lean emerging technologies and architecture advancements and apply the learnings to improve CoStar’s software products.



This position is located in Arlington, VA and is in onsite Monday – Thursday, option to work from home on Friday.

Responsibilities

  • Design and develop high performance web applications used by thousands of users globally
  • Drive continuous improvement by focusing on engineering excellence
  • Influence CI/CD pipeline improvements
  • Collaborate closely with other Software Engineers across the organization.
  • Mentor junior developers, review code and architecture, and promote software development best practices
  • Continually evaluate emerging technologies to identify opportunities, trends and best practices that can be used to strengthen CoStar’s technology platform and development practices
  • Develop and maintain an in-depth working knowledge of the CRE Industry and CoStar’s business model / technology

Basic Qualifications

  • Bachelor’s Degree required from an accredited, not for profit university or college.
  • A track record of commitment to prior employers
  • 6 years of production development experience in modern technologies, like React, Vue, TypeScript, NodeJS, C#, .Net, OpenSearch, Kafka, SQL, NoSQL
  • A demonstrable track record of building and launching successful products and platforms
  • Experience with cloud technologies like AWS, Cloud Managed Services, etc.
  • Experience in Agile/Scrum processes, and Continuous delivery practices
  • Experienced in unit, performance, and automation testing
  • Deeply understand what drives the business for which you are building software
  • Take an active role in mentoring developers with ability to build consensus

Preferred Qualifications And Skills

  • Experience managing a large Enterprise level code base, code quality and dependencies
  • Experience with C#, NodeJS, and/or React in particular
  • Excellent written and verbal communication skills
  • Commercial Real Estate (CRE) knowledge is a bonus

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), 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.

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

Salary.com Estimation for Senior Front-End Developer in Arlington, VA
$90,635 to $111,073
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