Senior JavaScript Front-End Developer

Job Title: Senior JavaScript Front-End Developer

Job Location:Hoboken, NJ

Job Type: Contract

Pay Range: $45.00hr - $50.00hr

Job Overview:

The candidate will serve as a Senior Front-End Developer responsible for building complex 3D interactive applications using modern React, Three.js, and React Three Fiber. The role focuses on real-time performance optimization, scalable state management, and accessible user interfaces for interactive platforms.

Front-End Engineering Foundations:

• Demonstrate deep, senior-level expertise in React (React 19 and modern React), including the render model, hooks discipline, memoization, effect timing, and performance optimization for frame-based applications.
• Utilize Three.js and React Three Fiber in production environments with strong command over the scene graph, geometry, materials, the useFrame render loop, and proper memory/WebGL leak management.
• Apply real-time performance discipline by accounting for frame budgets, profiling render loops, understanding GPU vs. CPU trade-offs, and optimizing for lower-spec target devices.
• Manage application state at scale using Zustand to maintain a clean, coherent architecture.
• Implement accessibility as a core requirement, including full keyboard navigation, focus management, ARIA standards, WCAG AA compliance, and screen-reader testing.
• Utilize TypeScript, Vite, and modern testing strategies that favor validating real application behavior over excessive mocking.

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 effectively by breaking down work into well-specified tasks, reviewing generated output, and writing custom logic when required.
• Help maintain repository structure and coding guidelines to keep codebase contributions consistent and secure.
• Collaborate with the 3D technical artist to integrate assets and shaders efficiently.

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• 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