LoopNet - Senior Software Engineer (C#/.NET)
CoStar•Irvine, CA
•$124,000 - $187,000•Hybrid
About The Position
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 reach 10 million+ users. You continuously learn emerging technologies and architecture advancements and apply the learnings to improve LoopNet’s software products. This position is in Irvine, CA and offers 4 days a week on-site with 1 day working from home.
Requirements
- Bachelor’s degree required from an accredited, not-for-profit university or college.
- A track record of commitment to prior employers
- 7+ years of production development experience with .NET or .NET Core
- Working experience with AWS cloud technologies (file storage, data storage, search, cache), Apache Kafka
- Frontend working knowledge (Vue, React or Angular, and TypeScript)
- A demonstrable track record of building and launching enterprise products/platforms
- Deliver products that meet specifications and performance SLA; experience in unit, performance, and integration tests
- Experience with Git-based workflows.
- Deeply understand enterprise application business logic
Nice To Haves
- Experience in relational database design (MS SQL or MySQL) including performance optimization and NoSQL design
- Application security knowledge
- Leverage AI Coding Tools for development, refactoring, and debugging (Claude Code, GitHub Copilot or equivalent).
Responsibilities
- Design and develop enterprise applications using software design principles/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 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 peer .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.
Benefits
- Generous compensation and performance-based incentives
- Internal training
- 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
- 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
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What This Job Offers
Job Type
Full-time
Career Level
Senior
