Frontend Developer Jobs (Senior) – React.js

Winzons; India; On-site; INR 1,200,000 - 1,800,000; Full time

Job summary

Sumanas Technologies is seeking a Senior Frontend Developer with strong React.js expertise to build scalable, high-performing web applications. The role focuses on clean code, testing, and responsive design.

You will work with React.js and Next.js, manage state with Redux RTK, write tests with Jest/Cypress/Mocha, utilize Material-UI, optimize performance, and collaborate with backend teams over RESTful APIs and WebSockets. PHP/Laravel experience is a plus.

Qualifications

• 4+ years of proven frontend experience with React.js.

Responsibilities

• Develop and maintain frontend applications using React.js and Next.js.
• Implement state management with Redux and RTK.
• Write and maintain unit and end-to-end tests (Jest, Cypress, Mocha).
• Use Material-UI (MUI) for UI components and libraries for consistency.
• Optimize performance and ensure cross-browser compatibility.
• Collaborate with backend developers to integrate RESTful APIs and WebSockets.

Skills

React.js

Redux RTK

Testing

RESTful APIs

WebSockets

Tools

Next.js

Material-UI (MUI)

Git

Job description

Company Name: Sumanas Technologies Position: Senior Frontend Developer Work Type: Full-Time Experience: 4-10 Years Location: Madurai / Coimbatore

About the Role

We are looking for a skilled Senior Frontend Developer with strong expertise in React.js to join our dynamic team. The ideal candidate will have hands‑on experience in building scalable, high-performing web applications with a focus on clean code, testing, and responsive design.

Key Responsibilities

• Develop and maintain high-quality, scalable frontend applications using React.js and Next.js.
• Implement state management using Redux and Redux Toolkit (RTK).
• Write and maintain unit and end-to-end tests using frameworks like Jest, Cypress, or Mocha.
• Work with Material‑UI (MUI) and reusable component libraries to deliver consistent UI.
• Optimize performance and ensure cross-browser compatibility.
• Collaborate with backend developers to integrate with RESTful APIs and WebSockets.
• Utilize advanced JavaScript concepts (Web Workers, Promise Pool, IndexedDB, Canvas, etc.) for performance optimization.
• Participate in Agile ceremonies, ensuring timely delivery of high‑quality features.
• (Optional) Contribute to backend integration with PHP and Laravel (Blade templating) when required.

Required Skills

• Excellent verbal and written communication skills.
• 4+ years of proven experience in frontend development with React.js.
• Proficiency in testing frameworks (Jest, Cypress, Mocha, etc.).
• Strong expertise in Redux & Redux Toolkit (RTK).
• Knowledge of Material-UI (MUI) or similar component libraries.
• Advanced understanding of JavaScript concepts (Web Workers, IndexedDB, Promises, Canvas, etc.).
• Solid understanding of RESTful APIs and WebSockets.
• Basic knowledge of PHP & Laravel (preferred but not mandatory).

Preferred Skills

• Experience in responsive design and cross‑browser compatibility.
• Familiarity with Git/version control systems.
• Knowledge of Agile methodologies.