{"schemaVersion":"jobsearcher.job.v1","id":"31edb576cb46fd2c629cf957","url":"https://jobsearcher.com/jobs/31edb576cb46fd2c629cf957","canonicalUrl":"https://jobsearcher.com/jobs/31edb576cb46fd2c629cf957","title":"LoopNet - Senior Full Stack Engineer","description":"LoopNet - Senior Full Stack Engineer\r\nLocation: Irvine, CA\r\nWe are seeking an accomplished Senior Software Engineer to support multiple software products and brands across the organization. The role has a direct impact on highly visible web applications used by more than 10,000,000 users.\r\nResponsibilitiesDesign and develop using Object‑Oriented design principles and software design patterns to achieve high reusability and maintainability.\r\nWrite unit‑testable C# software.\r\nDevelop a deep understanding of CoStar’s product architecture and frameworks.\r\nMaintain and contribute to CoStar’s product platform as necessary.\r\nDevelop database stored procedures and SQL scripts/ETL jobs that meet CoStar database standards to implement product requirements.\r\nParticipate and drive continuous improvement within Agile/Scrum teams.\r\nBuild consensus among different teams working on software development projects.\r\nFacilitate discussions among other .NET and database developers to exchange new ideas and improvements.\r\nContinuously evaluate emerging technologies to identify opportunities, trends, and best practices that strengthen CoStar’s technology platform and development practices.Required QualificationsBachelor’s Degree from an accredited, not‑for‑profit university or college.\r\nTrack record of commitment to prior employers.\r\nWorking knowledge of Vue, React, or Angular in TypeScript.\r\nExperience with AWS S3, SQS, Dynamo, ElastiCache, Apache Kafka, and Datadog.\r\nUse of AI coding tools for development, refactoring, and debugging (e.g., Claude Code, GitHub Copilot).\r\n7+ years of production development experience with C# .Net or .Net Core.\r\nDemonstrable track record of building and launching successful products and platforms.\r\nDeliver products that meet specifications and performance service level agreements.\r\nDeep understanding of business drivers for which you are building software.Preferred QualificationsExperience in relational database design (MS SQL or MySQL) including performance tuning.\r\nApplication security knowledge and experience with Git‑based workflows.\r\nActive role in mentoring developers and building consensus.\r\nExperience in unit, performance, and automation testing.BenefitsComprehensive healthcare coverage: medical, vision, dental, prescription drug, life, legal, and supplementary insurance.\r\nVirtual and in‑person mental health counseling services for individuals and families.\r\nCommuter and parking benefits.\r\n401(k) retirement plan with matching contributions.\r\nEmployee stock purchase plan.\r\nPaid time off.\r\nTuition reimbursement.\r\nOn‑site fitness center and/or reimbursed fitness center membership; yoga studio; group exercise classes.\r\nAccess to employee resource groups.\r\nComplimentary gourmet coffee, tea, hot chocolate, fresh fruit, and healthy snacks.Base Salary Range: $124,000 - $187,000, based on relevant skills and experience.\r\nCoStar Group is an Equal Employment Opportunity Employer; we maintain a drug‑free workplace and perform pre‑employment substance abuse testing. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity, sexual orientation, national origin, genetics, disability, age, or veteran status. We are an affirmative action employer. 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 www.costargroup.com/careers as a result of your disability. Request accommodations by emailing recruitaccommodation@costar.com.\r\n#J-18808-Ljbffr","company":"CoStar Group","rawCompany":"costar group","city":"Irvine","state":"CA","isRemote":false,"isActive":false,"createdAt":"2026-10-04T02:48:38.097Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1251.00","title":"Computer Programmers","slug":"computer-programmers"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"}],"industries":[{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"LoopNet - Senior Full Stack Engineer","description":"LoopNet - Senior Full Stack Engineer\r\nLocation: Irvine, CA\r\nWe are seeking an accomplished Senior Software Engineer to support multiple software products and brands across the organization. The role has a direct impact on highly visible web applications used by more than 10,000,000 users.\r\nResponsibilitiesDesign and develop using Object‑Oriented design principles and software design patterns to achieve high reusability and maintainability.\r\nWrite unit‑testable C# software.\r\nDevelop a deep understanding of CoStar’s product architecture and frameworks.\r\nMaintain and contribute to CoStar’s product platform as necessary.\r\nDevelop database stored procedures and SQL scripts/ETL jobs that meet CoStar database standards to implement product requirements.\r\nParticipate and drive continuous improvement within Agile/Scrum teams.\r\nBuild consensus among different teams working on software development projects.\r\nFacilitate discussions among other .NET and database developers to exchange new ideas and improvements.\r\nContinuously evaluate emerging technologies to identify opportunities, trends, and best practices that strengthen CoStar’s technology platform and development practices.Required QualificationsBachelor’s Degree from an accredited, not‑for‑profit university or college.\r\nTrack record of commitment to prior employers.\r\nWorking knowledge of Vue, React, or Angular in TypeScript.\r\nExperience with AWS S3, SQS, Dynamo, ElastiCache, Apache Kafka, and Datadog.\r\nUse of AI coding tools for development, refactoring, and debugging (e.g., Claude Code, GitHub Copilot).\r\n7+ years of production development experience with C# .Net or .Net Core.\r\nDemonstrable track record of building and launching successful products and platforms.\r\nDeliver products that meet specifications and performance service level agreements.\r\nDeep understanding of business drivers for which you are building software.Preferred QualificationsExperience in relational database design (MS SQL or MySQL) including performance tuning.\r\nApplication security knowledge and experience with Git‑based workflows.\r\nActive role in mentoring developers and building consensus.\r\nExperience in unit, performance, and automation testing.BenefitsComprehensive healthcare coverage: medical, vision, dental, prescription drug, life, legal, and supplementary insurance.\r\nVirtual and in‑person mental health counseling services for individuals and families.\r\nCommuter and parking benefits.\r\n401(k) retirement plan with matching contributions.\r\nEmployee stock purchase plan.\r\nPaid time off.\r\nTuition reimbursement.\r\nOn‑site fitness center and/or reimbursed fitness center membership; yoga studio; group exercise classes.\r\nAccess to employee resource groups.\r\nComplimentary gourmet coffee, tea, hot chocolate, fresh fruit, and healthy snacks.Base Salary Range: $124,000 - $187,000, based on relevant skills and experience.\r\nCoStar Group is an Equal Employment Opportunity Employer; we maintain a drug‑free workplace and perform pre‑employment substance abuse testing. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity, sexual orientation, national origin, genetics, disability, age, or veteran status. We are an affirmative action employer. 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 www.costargroup.com/careers as a result of your disability. Request accommodations by emailing recruitaccommodation@costar.com.\r\n#J-18808-Ljbffr","datePosted":"2026-10-04T02:48:38.097Z","dateModified":"2026-10-04T02:48:38.097Z","hiringOrganization":{"@type":"Organization","name":"CoStar Group","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Irvine","addressRegion":"CA","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"31edb576cb46fd2c629cf957"},"url":"https://jobsearcher.com/jobs/31edb576cb46fd2c629cf957"}}