Software Engineer I - BizBuySell - San Francisco, CA

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.

Responsibilities

​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

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

Web Application Development

Cloud Deployment

AWS

Azure

Relational Databases

SQL Server

MySQL

Software Testing Frameworks

Jest

Mocha

Software Design Patterns

Software Design Principles

Microservices Architecture

AI-Assisted Development Tools

Claude Code

GitHub Copilot

Code Quality

Accelerated Software Delivery

Mentoring

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

Company

Commercial real estate data, analytics, and online marketplaces.

Arlington, Virginia, USA

http://www.costargroup.com/

Founded in 1987

5001-10000 employees

Qualifications

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

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

Required skills

HTML5, CSS, JavaScript, Angular, Vue, TypeScript, Agile Development, AWS, Azure, SQL Server, MySQL, Jest, Mocha, Software Design Patterns, Microservices Architecture, Claude Code, GitHub Copilot

Preferred skills

Experience in microservices architectures, Experience mentoring junior developers

Experience

Entry level