Software Engineer I - BizBuySell - San Francisco, CA
San Francisco, CA
Full-time
Onsite
$125K/yr - $172K/yr
Entry Level
CoStar Group is hiring a Software Engineer I for its BizBuySell marketplace. The role builds and supports high-performance web experiences that simplify buying and selling businesses, with native support for multiple languages, currencies, and locale preferences.
Design, develop, and support high-traffic, real-time web applications using ASP.NET Core MVC on the backend and Angular, Vue, TypeScript, HTML5, CSS, and JavaScript on the frontend, ensuring they are performant, maintainable, and reusable
Build responsive, accessible (WCAG-compliant) interfaces that work reliably across browsers and devices
Lead in establishing architectural best practices and mentor junior team members
Analyze technical requirements and architect new components and web pages
Implement product features, refine specifications, and continuously improve code quality
Apply software design patterns and best practices for building reusable and maintainable code
Participate in code reviews, source control management, build automation, and testing processes
Take ownership of assigned tasks and deliver solutions from concept to implementation
Collaborate with engineers, product managers, and business partners on product design, feature development and delivery
Gain a deep understanding of the company's business domain and products
Qualification
Required
Bachelor's degree from an accredited, not-for-profit, in-person University or College
A track record of commitment to prior employers
Strong working knowledge of modern web technologies (HTML5, CSS, JavaScript)
Experience with a modern SPA framework (Angular, Vue, etc.) and TypeScript
Proven ability to write clean, maintainable, and well-documented code
Experience working in an Agile development environment
Excellent communication and collaboration skills
We welcome all qualified candidates who are currently eligible to work full-time in the United States
CoStar Group is not able to provide visa sponsorship for this position
Preferred
Experience building and deploying web applications to a cloud platform (AWS, Azure)
Experience with relational databases (e.g., SQL Server, MySQL)
Experience with software testing frameworks (e.g., Jest, Mocha)
Deep understanding of software design patterns and principles
Experience in microservices architectures
Experience mentoring junior developers
Effective use of AI-assisted development tools (e.g., Claude Code, Copilot) to accelerate delivery while maintaining strong code quality and architectural judgment
Benefits
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)
Access to CoStar Group’s Employee Resource Groups
Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks
CoStar Group (NASDAQ: CSGP) is the provider of commercial real estate information, analytics and marketing services.
