Senior Frontend Engineer: Immersive 3D/360 Viewer

Infinityy; New York (NY, MA); Hybrid; USD 120,000 - 180,000; Full time

Job summary

Infinityy is seeking a senior front-end engineer to own the React/TypeScript SPA, immersive viewer, and agent dashboard as we move to mobile-first delivery. You’ll ensure fast, polished experiences that scale with design specs and contractor handoff.

You’ll set front-end standards, optimize performance, manage global state with Zustand or Redux Toolkit, integrate with C#/.NET REST APIs, and regularly use AI coding tools to move faster without sacrificing quality.

Qualifications

• 5+ years of professional front-end engineering, with 3+ in production React and TypeScript.
• Shipped mobile-responsive, performance-sensitive SPAs used by real customers.
• Experience with Zustand, Redux Toolkit or similar, plus modern build tools (Vite, Webpack, Turbopack).
• Strong grasp of component design, async data flows and web performance profiling.
• Real-world use of AI coding tools as part of your daily workflow.
• Comfort owning a codebase you didn't write and improving it while shipping.

Responsibilities

• Own the React and TypeScript single-page app, including the immersive and traditional viewers and the agent dashboard.
• Lead the shift to mobile-first: responsive layouts, touch interactions and performance on mid-range phones.
• Build and maintain flows that combine 3D/360 tours, video calls, maps, Street View, chat and AI guide.
• Take over viewer and mobile code from contractors, documenting and paying down debt as you go.
• Manage global state with Zustand or Redux Toolkit and integrate with our C#/.NET REST APIs.
• Build signup, onboarding and upgrade flows that return users to what they were doing.
• Work from design specs in Figma with our product designer; push back when a flow isn't fully specified.
• Set front-end standards (components, accessibility, performance budgets) and review others' code.
• Use AI coding tools daily to move faster without lowering quality.

Skills

React

TypeScript

Frontend engineering

Web performance profiling

AI coding tools

Codebase ownership

Education

Bachelor's degree in Computer Science

Tools

Zustand

Redux Toolkit

Vite

Webpack

Turbopack

Git

Job description

Infinityy is seeking a senior front-end engineer to own the React/TypeScript SPA, immersive viewer, and agent dashboard as we move to mobile-first delivery. You’ll ensure fast, polished experiences that scale with design specs and contractor handoff.

You’ll set front-end standards, optimize performance, manage global state with Zustand or Redux Toolkit, integrate with C#/.NET REST APIs, and regularly use AI coding tools to move faster without sacrificing quality.