Senior React JS Developer

Job Title :- Senior React JS Developer

Location :- Lords Building, Lords Sinha Road, Kolkata – On-site (Monday to Friday)

Employment Type :- Full Time (Office Hours: Monday to Friday)

Experience Required :- Minimum 3 years of professional experience in front-end development with React.js (or equivalent) required.

Role Summary :-

We are looking for a highly skilled and motivated Senior React JS Developer to join our team at our Kolkata office. In this role you’ll be responsible for developing robust, scalable and high-quality web applications using React.js. You’ll collaborate closely with product, UX/UI, backend teams and assist in building user-facing features, reusable components, and optimizing performance and user experience.

Key Responsibilities :-

• Design, develop, test and deploy web applications and features using React.js and related front-end technologies (JavaScript/ES6+, HTML5, CSS3).
• Build reusable UI components and front-end libraries for future use.
• Translate design wireframes and prototypes into high-quality code with optimal performance across devices and browsers.
• Collaborate with backend engineers to integrate RESTful APIs or GraphQL endpoints.
• Work with UX/UI designers and product managers to conceptualise and implement intuitive user interfaces.
• Optimize application performance (rendering, load time, responsiveness) and ensure best practices in front-end architecture.
• Conduct code reviews, provide constructive feedback to other developers, mentor junior team members.
• Maintain and improve existing code base: refactor, debug, resolve performance bottlenecks.
• Stay up to date with latest front-end trends, tools, frameworks, and propose improvements to the tech stack and workflow.
• Participate in agile development process: sprint planning, stand-ups, retrospectives.

Required Skills & Qualifications :-

• Bachelor’s degree in Computer Science, Engineering or a related discipline – or equivalent professional experience.
• Minimum of 3 years of experience in front-end development, with substantial hands-on experience using React.js.
• Strong proficiency in JavaScript (ES6+), including DOM manipulation, object model, functional programming concepts.
• Solid experience with React core concepts (components, state, props, hooks, context, lifecycle).
• Experience with state management patterns/libraries such as Redux, Context API or equivalent.
• Skilled in HTML5, CSS3 (including preprocessors such as SASS/LESS) and responsive/adaptive design.
• Familiarity with build tools and bundlers (Webpack, Babel, npm/yarn) and version control (Git).
• Experience integrating front-end with RESTful APIs (or GraphQL) and working with JSON.
• Good understanding of cross-browser compatibility, performance tuning, web accessibility (WCAG) and responsive design best practices.
• Excellent problem-solving skills, attention to detail, ability to work independently and as part of a team.
• Strong communication skills and ability to work with cross-functional teams.

Preferred (Nice to Have) :-

• Experience with TypeScript in a React environment.
• Familiarity with testing frameworks/tools such as Jest, React Testing Library, Cypress.
• Experience with UI component libraries (Material-UI, Ant Design, Tailwind CSS) or design systems.
• Understanding of CI/CD pipelines, agile methodologies (Scrum/Kanban).
• Knowledge of Node.js or backend fundamentals, micro-frontends, SSR (Next.js).
• Previous experience mentoring or leading a small team.

Work Schedule & Location Notes :-

• This is an on-site role at our Kolkata office (Lords Building, Lords Sinha Road).
• Work days: Monday to Friday.
• Standard office hours; however, occasional flexibility during project deliveries may be required.

What We Offer :-

• Opportunity to work on meaningful projects in a collaborative environment.
• Professional development—we encourage staying updated with trends/tech and will support learning.
• A dynamic team and office location in central Kolkata (Lords Sinha Road).
• Competitive compensation (to be discussed) and benefits as per company policy.

Job Types: Full-time, Permanent

Pay: From ₹40,000.00 per month

Work Location: In person