Analytics - Senior Software Engineer - Front End

Job Description

OVERVIEW  

CoStar delivers real-time, verified commercial real estate data that helps clients confidently spot great opportunities and make smart choices ahead of competitors. By combining the power of CoStar’s independent research organization – the industry’s largest – with global data delivery, software, and application solutions, clients can act on opportunities with confidence. 

The Analytics team is responsible for the development of CoStar's customer-facing Real Estate Analytics products.  We think big, creating innovative data-intensive applications that take up the vast amount of data collected by our CoStar Research teams to create a fast, reliable and intuitive analytics platform for our customers.  We are a collaborative group with a mix of big data, API/platform and front-end skills, and we are growing rapidly to help invent the future of Real Estate Analytics.   

We are searching for an experienced Senior Software Engineer – Front End to join our team and drive the full-lifecycle development of this critical product.  

 This position is located in San Diego (UTC Area) and is in office Monday through Thursday with work from home on Friday.

RESPONSIBILITIES 

• Designing, building, testing, and deploying scalable, reusable, and maintainable applications that handle large amounts of data. 

• Taking ownership of your work, from development and testing to eventual deployment and support in production. 

• Collaborating with other engineers, product owners, designers, and leadership. 

• Mentor and guide junior and mid-level engineers, raising the technical bar through code reviews, pairing, and design discussions. 

• Becoming a trusted team member in technical architecture, design and code. 

• Advocating for evolution and improvement - both technical and non-technical - within our teams and across development teams at CoStar. Explore new technologies, tools and best practices. 

• Gaining a deep understanding of the CoStar business, including the Analytic products. 

BASIC QUALIFICATIONS 

• Bachelor’s Degree required from an accredited, not-for-profit, in-person college/university
• A track record of commitment to prior employers 

• 5+ years of modern front-end experience who can ramp up quickly 

• Strong proficiency in JavaScript, TypeScript, and at least one modern front-end framework (preferably React). 

• Demonstrated ability to design and implement complex UI architectures and component systems. 

• Experience using REST APIs, GraphQL and handling data-driven UI 

• Knowledge of CSS frameworks (Tailwind preferred) 

• Solid understanding of browser behavior, debugging tools, and performance basics 

• Exposure to Node.js or backend-for-frontend (BFF) patterns 

• Comfortable with Git, PR workflows, and code review best practices 

• Ability to break down ambiguous problems, create clear technical designs, and deliver independently with minimal guidance. 

• Comfort using AI-assisted engineering tools like GitHub Copilot to enhance productivity and quality 

PREFERRED QUALIFICATIONS AND SKILLS 

• Expertise with micro-frontend architectures 

• Familiarity with accessibility (WCAG), performance optimization techniques 

• Experience with D3 or other charting libraries 

• Understanding of Datadog RUM/APM, logging, or observability 

• Experience with Playwright, Jest, or other testing frameworks 

• Strong analytical and problem-solving abilities 

What’s in it for You

• When you join CoStar Group, you’ll experience a collaborative and innovative culture working alongside the best and brightest to empower our people and customers to succeed.
• We offer you generous compensation and performance-based incentives. CoStar Group also invests in your professional and academic growth with internal training, tuition reimbursement, and an inter-office exchange program.
• Our benefits package includes (but is not limited to):
• 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
• Tuition reimbursement
• 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 Diversity, Equity, & Inclusion Employee Resource Groups
• Complimentary gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks

This position offers a base salary range of $124,000 - $202,000, based on relevant skills and experience and includes a generous benefits plan.

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CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing