FrontEnd Developer (OL61)

CareSphere; Woodcliff Lake (NJ); On-site; USD 90,000 - 150,000; Full time

Job summary

CareSphere is hiring an in-office Front-End Developer to join our New Jersey team. You’ll build modern, high-performance web applications using React and Tailwind CSS, integrating with external APIs and services.

Responsibilities include crafting reusable components, optimizing performance, and collaborating with backend teams to deliver scalable interfaces that are easy to maintain and extend as the product grows. Strong English communication and UI attention are essential.

Qualifications

• Strong proficiency in React with hooks and component architecture.
• Mastery of Tailwind CSS for responsive layouts and theme customization.
• Solid JavaScript/TypeScript fundamentals and async programming.
• Experience consuming RESTful APIs and handling JSON and CORS.
• Experience integrating third-party services (auth providers, payment gateways, webhooks).
• Ability to build scalable, modular architecture with reusable components.
• Familiarity with modern build tools such as Vite.
• Experience with environment variables and secure config across dev/stage/prod.

Responsibilities

• Develop scalable, high-performance front-end applications using React.
• Integrate with external APIs and ensure robust error handling and security.

Skills

React

Tailwind CSS

JavaScript/TypeScript

REST APIs

Git & Workflows

Performance Optimization

CI/CD Tools

Tools

Vite

Job description

IMMEDIATE HIRE – IN-OFFICE POSITION

Please do not apply unless you currently live within commuting distance of the office and are available to start immediately.

Candidates must have strong English communication skills and be able to speak clearly and be easily understood.

Are you passionate about building modern, high-performance web applications? We're looking for a talented Front-End Developer with strong React and Tailwind CSS experience to help develop scalable, user-friendly applications that integrate seamlessly with external APIs and third-party services.

What You'll Bring

Required Technical Skills

React

• Strong proficiency in React (Hooks, Custom Hooks, Functional Components, State Management, and Component Architecture).

Tailwind CSS

• Mastery of utility-first CSS styling

• Responsive layout design

• Theme customization

• Reusable component styling

JavaScript / TypeScript

• Solid foundation in modern ECMAScript (ES6+)

• Asynchronous programming (Async/Await, Promises)

API & Backend Integration

RESTful API Consumption

• Proven experience fetching data from and sending data to external REST APIs

• Handling JSON payloads

• Understanding standard error response codes

• Managing CORS

• Implementing authentication header strategies

External Third-Party APIs

• Track record of integrating third-party services such as:

• Authentication providers

• Payment gateways

• Webhooks

• Experience handling rate limiting, API keys, and error states gracefully

Scalability & Architecture

Modular Architecture

• Ability to structure scalable and maintainable project directory layouts

• Write clean, reusable components

Extensibility & Adaptability

• Experience integrating new libraries, state management tools, and UI utilities as applications scale

Build Tools & Performance

• Familiarity with modern build tools (e.g., Vite)

• Web performance optimization techniques, including:

• Lazy loading

• Code splitting

Development Practices & Collaboration

Git & Version Control

• Proficiency with Git workflows

• Branching strategies

• Pull requests

• Code reviews

Environment Configuration

• Experience managing environment variables (.env) securely across:

• Development

• Staging

• Production environments