Senior Software Engineer @ CoStar Group - Irvine, CA

Senior Software Engineer

14 days ago
Senior Software Engineer
Job Description
CoStar delivers real-time, verified commercial real estate data that helps clients confidently spot great opportunities and make smart choices ahead of competitors. By combining the power of CoStar’s independent research organization – the industry’s largest – with global data delivery, software, and application solutions, clients can act on opportunities with confidence.

CoStar’s software engineers build products that facilitate 86% of commercial real estate transactions in the United States. These transactions range from a small business owner leasing their first office space to a large multi-national buying a new headquarters campus. On any given day our developers are building products that manage nearly a trillion dollars of potential real estate transactions. We are searching for a developer to join the product development team in San Diego and work to create the APIs for all CoStar Products including CoStar, LoopNet and Apartments.


  • Design and develop using Object Oriented design principles and software design patterns to attain high reusability and maintainability.
  • Deep knowledge and experience in writing unit testable software with React, Angular, JavaScript, TypeScript, C#, NodeJS
  • Develop an in-depth understanding of CoStar’s product architecture and frameworks. Maintain and contribute to CoStar’s product platform as necessary.
  • Develop database stored procedures and SQL scripts that meet CoStar database standards to implement product requirements.
  • Maintain and support CoStar’s products that are released to stakeholders and customers.
  • Participate and drive continuous improvement within CoStar’s Agile/Scrum teams.
  • Build consensus among different teams working on software development projects.
  • Facilitate discussions among other 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.
  • Build solutions that operate on massive amounts of data in high transaction volume applications.
  • Work with your QA resources to ensure that the software you deliver is of the highest quality. (Our customers are not beta testers.)
  • Act as a key member of the product launch team and work closely to DevOps to resolve operational issues.
  • Take an active role in mentoring other developers.


  • 3+ experience in designing and building large scale software product and web applications in an agile environment
  • 3+ years of experience in ReactJS or Angular, or NodeJS.
  • 4+ years' latest technologies with a focus in .Net Core or .Net Framework using C# language
  • 5+ years of experience in JavaScript, HTML/CSS, and/or other front-end technologies
  • 5+ years of experience in SQL database development work or any other database technology
  • SOA principles and Design patterns
  • Experience with Unity or IOC design patterns
  • Demonstrates good working knowledge of SOA - Web services, Web API


  • Strong communication skills (to both business and technical partners)
  • Hands on experience on APIs use ExpressJS/NodeJS/GraphQL and C#.
  • Knowledgeable with debugging tools including Chrome Debugger, Postman, Fiddler, Kibana etc.
  • Ability to work with minimal supervision or assistance to complete tasks.
  • Possesses strong analytical and problem-solving abilities.
  • Possesses Enterprise development experience.
  • Requirements analysis and management
  • Software testing (Unit, System, Integration, Functional, Performance).
  • Ability to clearly communicate thoughts and ideas within and across teams.
  • Ability to work well with other developers and management.
  • Ability to juggle priorities
  • Awareness of emerging technologies
  • Bachelor’s Degree (Computer Science preferred)


Founded in 1987, CoStar Group is the leading provider of commercial real estate information, analytics, and online marketplaces. Our suite of online services enables clients to analyze, interpret and gain unmatched insight on commercial property values, market conditions and current availability. Behind some of the most well-known brands in the industry, CoStar Group includes CoStar, the largest provider of CRE research and real-time data; LoopNet, the most heavily trafficked mobile and online real estate marketplace;, the premier rental home resource for renters, property managers and owners; STR, the leading provider of performance benchmarking and comparative analytics to the hotel industry; BizBuySell, the largest online marketplace for businesses-for-sales; and Lands of America, the leading operator of online marketplaces for rural real estate.
Headquartered in Washington, DC, CoStar Group maintains offices throughout the U.S. and in Europe, Canada, and Asia with a staff of over 4,300 worldwide.


Working at CoStar Group means you'll enjoy a culture of collaboration and innovation that attracts the best and brightest across a broad range of disciplines. In addition to generous compensation and performance-based incentives, you'll be supported in both 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
  • Commuter and parking benefits
  • 401(K) retirement plan with matching contributions
  • Employee stock purchase plan
  • Paid time off
  • Tuition reimbursement
  • Complimentary gourmet coffee, tea, hot chocolate, prepared foods, fresh fruit, and other healthy snacks

Be part of a team of professionals enjoying the opportunity to learn, do, and grow in a rewarding atmosphere. But don't just take our word for it - see why our team chose to work at and stay at CoStar Group: