Software Engineer II - LoopNet

About the Role

Our team is seeking an accomplished Senior Software Engineer to join our team in supporting multiple software products and brands across the organization, such as www.LoopNet.com. You will have a direct impact on highly visible web applications that touch more than 10,000,000 users. You continuously learn emerging technologies and architecture advancements and apply the learnings to improve LoopNet's software products. This position is located in Irvine, CA and offers 4 days a week onsite with 1 day work from home.

Responsibilities

• 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 C#
• 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/ETL jobs that meet CoStar database standards to implement product requirements.
• 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 .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.

Required Qualifications

• Bachelor's Degree required from an accredited, not-for-profit in person university or college.
• A track record of commitment to prior employers.
• Working knowledge Vue, React or Angular in TypeScript
• Experience with AWS S3, SQS, Dynamo, ElastiCache, Apache Kafka and Datadog
• Leverage AI Coding Tools for development, refactoring, and debugging (Claude Code, GitHub Copilot or equivalent).
• 5+ years of production development experience with C# .Net (or .Net Core)
• A demonstrable track record of building and launching successful products and platforms
• Deliver products that meet specifications and performance SLA
• Deeply understand what drives the business for which you are building software

Preferred Qualifications

• Experience in relational database design (MS SQL or MySQL) including performance tuning
• Application security knowledge and experience with Git-based workflows.
• Take an active role in mentoring developers with ability to build consensus
• Experienced in unit, performance, and automation testing

Benefits

• 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 Employee Resource Groups
• Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks

Pay

This position offers a base salary range of $119,000-$165,000 based on relevant skills and experience and includes a generous benefits plan.