A$ A' "A' ?Job DescriptionOVERVIEW 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 developers 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.As a CoStar 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, LoopNet and . You will deeply understand what drives the business for which you are building software. We firmly believe that what separates a good developer from a great one is a deep understanding of the business that they are supporting.ResponsibilitiesUse your experience to drive the design of highly performant and highly available products and platforms.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.Basic QualificationsBachelor's degreeA demonstrable track record of building and launching successful products and/or platforms that leverage terabytes of data and scale to meet the needs of millions of users3+ years of deep .NET development (C#) development experience including cross platform communication technologies such as Web API or WCF3+ years of database design, T-SQL programming, and performance tuning experienceAbility to design and develop using Object Oriented design principles and software design patterns to attain high reusability and maintainabilityPreferred Qualifications And SkillsDeliver work products that meet specifications, are defect free and performantExperienced in application performance testing and unit testing strategies and implementationFacilitate discussions among other developers to exchange ideas and introduce new technologies. Ability to build consensus among other technologists.Evaluate emerging technologies to identify opportunities, trends and best practices that can be leveraged to strengthen CoStar's technology platform and development practices.Willingness to take an active role in mentoring other developersOverview Of CompanyFounded 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 US and in Europe, Canada, and Asia with a staff of over 4,300 worldwide.What's In It For YouWorking 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 DrugLife, legal, and supplementary insuranceCommuter and parking benefits401(K) retirement plan with matching contributionsEmployee stock purchase planPaid time offTuition reimbursementOn-site fitness center and/or reimbursed fitness center membership costs (location dependent), with yoga studio, Pelotons, personal training, group exercise classes, as well as Segways and bikes available for use during the dayComplimentary gourmet coffee, tea, hot chocolate, prepared foods, fresh fruit, and other healthy snacksBe 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: welcome all qualified candidates who are currently eligible to work full-time in the United States to apply. However, please note that CoStar is not able to provide visa sponsorship for this position.Location:This position is based in Washington, DC. If you do not currently reside in or near Washington, DC CoStar expects that you will relocate upon acceptance of any offer of employment.CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing.