Software Engineer II

About the Role

• Develop and maintain engaging, responsive, high-performance web applications using React, TypeScript, and Tailwind CSS. • Build reusable, scalable, and secure UI components and libraries with a focus on maintainability and performance. • Collaborate with cross‑functional teams including designers, backend developers, and product managers to translate business needs into technical solutions. • Contribute to and maintain shared component libraries and front‑end architecture. • Write comprehensive unit and integration tests using tools such as Jest and React Testing Library. • Participate actively in code reviews, pair programming, and agile ceremonies. • Mentor other developers and serve as a subject‑matter expert in the front‑end technology stack. • Continuously evaluate emerging technologies to identify opportunities, trends, and best practices for strengthening CoStar’s platform.

Key Responsibilities

• ▸react development
• ▸ui components
• ▸component library
• ▸unit testing
• ▸code review
• ▸mentorship

What You Bring

• Bachelor’s degree from an accredited, non‑profit university or college. • 3+ years of production development experience with modern front‑end frameworks. • Strong proficiency in React.js, TypeScript, and Tailwind CSS. • Deep understanding of HTML, CSS, JavaScript, and responsive design. • Solid knowledge of RESTful APIs and front‑end build tools (e.g., Webpack, Babel). • Strong grasp of web standards, accessibility, and security best practices. • Experience working in Agile development environments. • Experience in unit, performance, and automation testing. • Excellent communication, collaboration, and problem‑solving skills. • Track record of commitment to previous employers. • Experience with state‑management libraries such as Redux or Context API. • Familiarity with Micro Front Ends (a plus). • Experience with C# and SQL to integrate front‑end components into scalable, secure backend architecture. • Knowledge of relational databases (SQL Server) and document data systems (Dynamo, Elastic Search) (a plus). • Comfortable working across the stack with Node.js on the server‑side.

Requirements

• ▸bachelor's
• ▸react
• ▸typescript
• ▸tailwind
• ▸redux
• ▸node.js

Benefits

CoStar offers a collaborative and innovative culture, generous compensation, performance‑based incentives, and strong investment in professional development through internal training and tuition reimbursement. • Generous compensation and performance‑based incentives. • Internal training and tuition reimbursement. • Comprehensive healthcare coverage: medical, vision, dental, and prescription drug. • Life, legal, and supplementary insurance. • Virtual and in‑person mental health counseling services for individuals and families. • 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, and group exercise classes. • Access to CoStar Group’s Diversity, Equity, & Inclusion Employee Resource Groups. • Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks.

Work Environment

Office Full-Time