Senior Software Engineer

Senior Software Engineer ()

CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Within that ecosystem,  is one of the fastest growing real‑estate portals, dedicated to becoming the #1 brand in home buying experiences.

We are looking for an object‑oriented Senior Software Engineer who takes pride in backend development to contribute to building innovative, scalable applications in pursuit of a great user experience. The role focuses on the next generation of residential products, apps, and services, and offers the opportunity to make a real impact on the company and industry.

• Design and develop high performance web applications used by hundreds of thousands of users globally
• Design and develop using Object Oriented design principles and software design patterns to attain high reusability and maintainability
• Promote consistent architecture patterns for design and development within and across Homes development teams
• Collaborate closely with other Software Engineers across the organization
• Advocate standards‑driven technology
• Facilitate discussions among other .NET and database developers to exchange new ideas and improvements
• Continually evaluate emerging technologies to identify opportunities, trends and best practices that can be used to strengthen CoStar’s technology platform and development practices

• Bachelor’s Degree required from an accredited, not for profit, in‑person university or college (preferably in Computer Science, Engineering or a related field)
• A track record of commitment to prior employers
• 5+ years of production development experience with C#, .NET (or .NET Core) and/or Java
• Experience delivering products that meet specifications and performance SLA
• Experienced in unit, performance, and automation testing
• Deeply understand what drives the business for which you are building software

• Experience in relational database design (AWS RDS, MS SQL) including performance tuning
• Experience with AWS S3, Step Functions, Lambda, SQS, Dynamo, Elasti Cache, Apache Kafka and Datadog
• A demonstrable track record of building and launching successful products and platforms

• 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 (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.

CoStar Group 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 our career portal. You can request reasonable accommodations by calling or via email at