Senior Software Engineer; C#​/React

Senior Software Engineer (C#/React)

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. By equipping the brightest minds with the best resources available, we provide an invaluable edge in real estate.

• Building customer-facing web applications using the latest React and Type Script frameworks.
• Build micro services and RESTful APIs C# and .NET Core.
• Drive and lead software design, developing standards and performing code reviews, that result in robust a code base that is efficient and maintainable.
• Continually evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strengthen CoStar’s technology platform and develop practices.
• Develop comprehensive application testing procedures to ensure high quality applications for tens of thousands of users.

• 5+ years of software development experience
• Demonstrated experience in architecting, designing and building large-scale distributed, services-oriented systems and web applications in an agile environment
• Experience developing frontend applications using React
• Experience building RESTful APIs using C#
• Proficient understanding of code versioning tools such as Git
• Familiarity with CI/CD deployment processes
• Bachelor’s Degree required from an accredited, not for profit university or college
• A track record of commitment to prior employer

• Experience with SQL
• Experience with Elasticsearch or Open Search
• Strong communication skills (to both business and technical partners)
• Data modeling experience from conceptual, logical and physical designs

• 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, Peloton, 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. CoStar is committed to creating a diverse environment and is proud to be an equal opportunity workplace and affirmative action employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.

CoStar is also committed to compliance with all fair employment practices regarding citizenship and immigration status. If you are a qualified individual with a disability or a disabled veteran, you may request a reasonable accommodation if you are unable or limited in your ability to use or access  as a result of your disability. You can request reasonable accommodations by calling or by sending an email to