Senior Software Engineer; C#​/.NET

CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. 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 for our customers.

As a Co Star  
Senior Software Engineer on the Platform Development team, you will play a key role in expanding the data platform that supports all of CoStar Group’s largest brands including CoStar Suite, Loop Net and  You will deeply understand what drives the business for which you are building software.

This position is located in Arlington, VA. and is in office Monday – Thursday with work from home on Friday.

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.

• Build large, distributed, API-driven systems accessed by millions of users each month
• Produce bullet-proof code that is robust, efficient and maintainable; our primary tools are C#, .NET Framework, SQL Server, AWS
• Lead software design sessions, promote adoption of development patterns, perform code reviews
• Continually evaluate emerging technologies to identify opportunities, trends, and best practices that can be leveraged to strengthen CoStar’s technology platform and development practices
• Knowledge-sharing and mentoring of more junior-level team members

• Bachelor’s Degree required from an accredited, not for profit university or college.
• A track record of delivering long-term impact to prior employers.
• 5+ years’ experience in C#, .NET Framework
• Working knowledge and hands-on experience with cloud-based platforms (AWS or Azure)
• Experience with RESTful web services and ASP.NET MVC/WebAPI
• Experience in architecting, designing, and building large scale, distributed service-oriented systems and Web applications in an agile environment
• Relational database schema design
• Strong communication skills; the ability to convey technical jargon to both business and technical partners

• SQL and database development knowledge
• Familiarity with AWS PaaS services such as Lambda, Dynamo
  
  DB, and SQS
• Data modeling experience from conceptual, logical, and physical designs

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.

• 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