Senior JavaScript Front-End Developer

Quick Facts

• Role: Senior JavaScript Front-End Developer
• Location: Hoboken, NJ
• Employment: Contract
• Pay Range: $45.00/hr - $50.00/hr

Description

The role is a Senior Front-End Developer focused on building complex 3D interactive applications using React, Three.js, and React Three Fiber. You will drive real-time performance optimization, scalable state management, and accessible user interfaces for interactive platforms.

Responsibilities

• Build and own complex React Three Fiber features, including interactive 3D equipment, selection-driven action systems, real-time visual effects, and supporting UI components.
• Profile and tune the render loop to maintain frame rate performance on lower-end devices.
• Maintain coherent application state across simulation elements, equipment, event logs, and UI components using Zustand.
• Ensure full accessibility compliance through keyboard operation, screen-reader compatibility, and ARIA standards.
• Direct AI coding tools by breaking work into well-specified tasks, reviewing generated output, and writing custom logic when required.
• Help maintain repository structure and coding guidelines to keep the codebase contributions consistent and secure.
• Collaborate with the 3D technical artist to integrate assets and shaders efficiently.

Requirements

• Deep, senior-level expertise in React (React 19 and modern React), including render model, hooks discipline, memoization, effect timing, and performance optimization for frame-based applications.
• Production experience with Three.js and React Three Fiber, including command of the scene graph, geometry, materials, the useFrame render loop, and proper memory/WebGL leak management.
• Real-time performance discipline: account for frame budgets, profile render loops, understand GPU vs. CPU trade-offs, and optimize for lower-spec target devices.
• Ability to manage application state at scale using Zustand.
• Accessibility as a core requirement: full keyboard navigation, focus management, ARIA standards, WCAG AA compliance, and screen-reader testing.
• Use TypeScript, Vite, and modern testing strategies that validate real application behavior over excessive mocking.

Benefits

• Medical, Dental, and Vision Insurance
• 401(k) Retirement Plan
• Health Savings Account (HSA)
• Disability Insurance (Short-Term and Long-Term)
• Life and AD&D Insurance
• Paid Sick Leave (where required by applicable state or local law)
• Supplemental Insurance Plans
• Identity Theft Protection
• Pet Insurance
• Employee Wellness Programs
• Employee Assistance Program (EAP)
• Career Growth and Professional Development Opportunities