Lead Software Engineer

About the Role

• Design and develop high‑performance web applications used by thousands of users globally • Influence CI/CD pipeline improvements • Collaborate closely with other software engineers across the organization • Mentor junior developers, review code and architecture, and promote best practices • Evaluate emerging technologies to identify opportunities, trends, and best practices for strengthening CoStar’s platform • Develop and maintain in‑depth knowledge of the CRE industry and CoStar’s business model/technology • Build agents and workflows using modern AI patterns • Leverage Vibe coding to improve productivity and quality

Key Responsibilities

• ▸web development
• ▸ci/cd
• ▸code review
• ▸ai workflows
• ▸tech evaluation
• ▸vibe coding

What You Bring

• Bachelor’s degree from an accredited, not‑for‑profit university or college • 8+ years of production development experience with modern technologies (e.g., React, Vue, TypeScript, NodeJS, C#, .NET, OpenSearch, Kafka, SQL, NoSQL) • Proven track record of building and launching successful products and platforms • Experience with cloud technologies such as AWS or managed services • Experience in Agile/Scrum processes and continuous delivery practices • Proficiency in unit, performance, and automation testing • Deep understanding of business drivers for the software you build • Ability to mentor developers and build consensus • Experience managing a large enterprise‑level code base, ensuring code quality and managing dependencies • Proficiency with C#, NodeJS, and/or React • Excellent written and verbal communication skills • Eligibility limited to candidates authorized to work full‑time in the United States; no visa sponsorship provided

Requirements

• ▸bachelor's
• ▸8+ years
• ▸c#
• ▸react
• ▸aws
• ▸agile

Benefits

• Collaborative and innovative culture with opportunities to work alongside top talent • Competitive compensation and performance‑based incentives • Internal training and tuition reimbursement for professional growth • Comprehensive healthcare coverage (medical, vision, dental, prescription drug) • Life, legal, and supplementary insurance • Mental health counseling services (virtual and in‑person) for individuals and families • Commuter and parking benefits • 401(k) plan with matching contributions • Employee stock purchase plan • Paid time off and tuition reimbursement • On‑site fitness center or reimbursed membership, including yoga studio, Pelotons, personal training, and group classes • Access to Diversity, Equity & Inclusion employee resource groups • Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and healthy snacks

Work Environment

Office Full-Time