Senior Front End Engineer

CoStar Group•Sunnyvale, CA

1d•Hybrid

About The Position

CoStar Group is a leading global provider of commercial and real estate information, analytics, and online marketplaces. This role is for a Senior Frontend Software Engineer to help build and evolve the frontend systems that support Matterport’s mobile capture and marketplace experiences. The role sits within the mobile organization and focuses on developing TypeScript-based frontend components and workflows that integrate directly into native mobile applications and connect with Matterport’s 3D and platform services. The engineer will work closely with iOS, Android, and 3D engineering teams to develop embedded frontend experiences, support capture and review workflows, and integrate Matterport technology into CoStar’s marketplaces. This is a frontend engineering position focused on building reliable, maintainable, and scalable frontend functionality that lives alongside mobile products.

Requirements

5+ years of experience designing and delivering frontend applications using TypeScript
Experience working with cross‑functional teams including Product, Design, and Engineering
Experience writing maintainable code and participating in code reviews
Experience implementing unit and integration tests
Familiarity working with frontend systems that integrate with backend services or platform APIs

Nice To Haves

Familiarity with WebGL concepts or visualizing spatial data in frontend applications
Experience working adjacent to 3D systems or data pipelines
Experience using frontend frameworks or libraries to visualize maps, spatial data, or capture progress
Exposure to mobile workflows, field tools, or capture‑based products
Experience building prototypes or proof‑of‑concepts
Experience supporting frontend features used by consumer or marketplace platforms
Prior experience in real estate, mapping, visualization, or geospatial products

Responsibilities

Design and deliver high-quality Front End systems and user interfaces using TypeScript and modern frontend frameworks, with a strong focus on maintainability, and scalability.
Build components and experiences that support and extend mobile workflows by embedding the components into native applications
Develop complex workflows which can run offline and support two-way communication between native applications and web components
Utilize libraries and frameworks to visualize spatial data within mobile components
Stay current with evolving mobile and TypeScript ecosystems, applying new tools and patterns where they provide clear value.
Work with a cross-functional team of product managers, designers, mobile engineers, and platform engineers to deliver features that integrate into CoStar’s mobile products and marketplace ecosystems.
Collaborate closely with 3D engineering teams to integrate frontend experiences with 3D-powered services
Champion frontend best practices including TypeScript patterns, strong typing, performance optimizations, and clean architectural design.
Create prototypes or proof-of-concepts to validate new frontend ideas, integrations, or platform capabilities where they intersect with mobile or marketplace products.
Implement and maintain appropriate unit and integration tests to ensure frontend reliability and long-term stability.
Work closely with QA and customer-facing teams to triage issues, maintain existing functionality, and improve overall product quality.

Benefits

Generous compensation and 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
Access to CoStar Group’s Diversity, Equity, & Inclusion Employee Resource Groups
Complimentary in office gourmet coffee, tea, hot chocolate, fresh fruit, and other healthy snacks