React.js Developer

Job Description: React Developer (3–5 Years Experience)

Location: Mumbai

Employment Type: Full-time

Role: Frontend Developer (React.js)

About the Role

We are looking for a highly skilled React Developer with 3–5 years of hands-on experience in building modern, scalable, and responsive web applications. The ideal candidate should be proficient in React.js, frontend architecture, state management, and UI best practices.

Key Responsibilities

• Develop responsive, high-performance web applications using React.js, JavaScript/TypeScript.
• Build reusable components and front-end libraries for future use.
• Work closely with UI/UX designers to convert wireframes and prototypes into functional user interfaces.
• Optimize applications for maximum speed, scalability, and cross-browser compatibility.
• Integrate RESTful APIs and work collaboratively with backend teams.
• Participate in code reviews and contribute to continuous improvement of best practices.
• Troubleshoot, debug, and enhance existing applications.
• Ensure high code quality through proper testing and documentation.

Required Skills & Experience

• 3–5 years of professional experience in React.js development.
• Strong proficiency in JavaScript (ES6+) and TypeScript.
• Hands-on experience with Redux, Context API, or other state-management libraries.
• Good understanding of HTML5, CSS3, SASS, and modern UI frameworks.
• Experience working with REST APIs, JSON, and asynchronous programming.
• Familiarity with build tools like Webpack, Vite, Babel, etc.
• Understanding of Git and version control workflows.
• Knowledge of React hooks, performance optimization, and component lifecycle.
• Experience with testing frameworks (Jest, React Testing Library) is a plus.

Good to Have

• Experience with Next.js or server-side rendering.
• Knowledge of UI libraries such as Material-UI, Ant Design, or Chakra.
• Familiarity with Agile/Scrum methodologies.
• Basic exposure to DevOps tools and CI/CD pipelines.

Why Join Us?

• Opportunity to work on cutting-edge technologies.
• Collaborative, fast-paced, and growth-oriented environment.
• Competitive compensation and employee benefits.

We are looking for a Frontend Engineer who is passionate about building clean, performant, and intuitive user interfaces.

This role is ideal for someone who has expertise in React and Next.js, enabling you to architect and build scalable, high-performance, and user-centric web applications. You will leverage modern frontend patterns to deliver clean, maintainable, and production-grade interfaces.

• 1-2 years of work experience with JavaScript
• 1-2 years of work experience with React.js/Next.js

Apply with : https://app.skillbrew.ai/jobs/?id=93

Responsibilities

• Take ownership of frontend features from development to release
• Build responsive, reusable, and high-quality UI components using React / Next.js
• Convert designs into production-ready code with clean and maintainable standards
• Collaborate with backend engineers and designers to deliver features
• Integrate frontend applications with backend APIs, ensuring secure and efficient data flow
• Optimize component rendering, state management, and overall UI performance
• Implement lazy loading, code splitting, and caching strategies to improve Core Web Vitals
• Debug and fix cross-browser and cross-device UI issues
• Apply frontend security best practices (XSS, CSRF, secure input handling, authentication flows)
• Contribute to frontend architecture decisions for scalability and maintainability
• Continuously improve UI/UX based on feedback and analytics

Job Requirements / Skills

• Bachelor’s degree in Computer Science, Computer Engineering, or equivalent practical experience
• 1–2 years experience building modern frontend applications
• Strong fundamentals in HTML, CSS, JavaScript, and OOP concepts
• Hands-on experience with React.js / Next.js and state management
• Understanding of performance optimization, accessibility, and security best practices
• Familiarity with REST APIs and frontend-backend integration
• Problem-solving mindset with attention to detail
• Strong ownership, collaboration, and communication skills
• Eagerness to learn new technologies and contribute to product vision

Responsibilities include:

• You will design and build web applications
• Collaborate with cross-functional teams to define, design, and ship new features
• Do Unit-test code for robustness, including edge cases, usability, and general reliability
• Participate in all phases of development, from design to implementation, unit testing, and release.
• In close collaboration with project teams, you will have the chance to redefine the development process for modern web-based applications.
• You will work highly customer-focused and be given the time to learn and experiment with the latest frontend technologies

ESSENTIAL SKILLS / EXPERIENCE REQUIRED:

• Bachelor's degree in Computer Science or equivalent
• 3 - 8 years of experience
• Experience in HTML, JavaScript, CSS, and JavaScript frameworks.
• Experience with the latest frontend technologies (e.g. ECMAScript, Webpack, ESLint, Service workers, etc.)
• In-depth knowledge of at least one JavaScript framework (e.g. React, Vue, Angular, etc.)
• Experience or Knowledge of web application optimizations.

UI Developer :

Experience in developing Web Applications/websites using HTML5, CSS3, and Bootstrap4 or above is essential

Experience in CSS preprocessors like Less, Sass

Experience in developing Responsive and Mobile First design products/websites using wireframes & mock-ups is essential

Experience in tailwind CSS is a must (config, create custom util function)

Experience in the latest design principles and animations is essential

Experience in Photoshop / Sketch tools and collaborative products like Invision / Figma is desirable

A fair understanding of JavaScript programming / Jquery is essential

Experience in working with React

Good knowledge of web standards and SEO principles is desirable

Responsibilities:

• Build the foundation of our supply side (enterprise) product from scratch. Maintain high standards of pixel perfect Ui’s and efficient User Experiences. 
• Our Supply Side ecosystem involves a plethora of products such as Catalog Management, Analytics Dashboard, Orders Processing, Finance Reconciliation, Notification centres etc. Develop a deep understanding of the mentioned use cases and build the systems for scale.
• Coordinate with Product managers, Product Designers & Backend Developers and outline sprints and tasks on a weekly basis.
• Conduct Comprehensive Unit tests before passing features to QAs. This requires a good top level understanding of backend infrastructure.
• Maintain High level of Code Quality and constantly optimize for performance and user experience.
• Be Collaborative. Self reliant and always keep pushing the limits of your knowledge.

Job Requirements/Responsibilities :

- Participate as a team member in all phases of software development lifecycle.

- Coordinating with the team on individual responsibilities and roadblocks.

- Perform design, development and testing on individual tasks

- Managing initiatives on UI/UX work

- Transparently share the challenges & feedback.

- Participate in integrated testing of product/ package.

- Designing a modern highly responsive web-based enterprise application component user interface.

- Building reusable components and front-end libraries for future use.

- Translating designs and wireframes into high-quality code.

- Learn and understand user interactions.

- Optimizing components for maximum performance across a vast array of web-capable devices and browsers

- Coordinating with various teams working on distinct layers.

- Providing technical assistance to the other teammates.

- Keep compliance with Quality Systems and Procedure

What You Will Be Doing:

• Create highly responsive B2C web-app using a wide range of open source frontend and backend technology.
• Create single page applications using wide range of javascript & cutting edge libraries/frameworks.
• Responsible for the full lifecycle of a project, including development, unit testing, system testing and change management.
• Research technical issues and provides recommendations to enhance JavaScript products.
• Working with multiple projects.

What we are looking for:

• Bachelor’s degree in Computer Science or equivalent preferably from IIT,NIT & other premier institutes.
• Rockstar JavaScript developer, who appreciates the intricacies of JS as well as passionate to follow new trends in JS.
• Experience with product companies.
• 4-9 yrs of software development on advanced JavaScript stack (Native JavaScript, Asynchronous Request Handling, AJAX, HTML5, CSS3, etc).
• In-depth knowledge in ReactJS & NodeJS
• Proficiency in any other modern web frameworks will be a plus.
• A solid knowledge of advanced data structures & algorithms.
• Proficient in Computer Science fundamentals & object-oriented design.
• Solid understanding of cross-browser compatibility issues and ways to tackle those.
• Must possess a track record of building Single Page responsive UI.
• Experience with Databases such as NoSQL and any RDBMS will be a plus.
• Experience with transport protocols such as TCP, HTTP & WebSocket.
• Expressing and appreciating design patterns is a real addition.
• Critical of coding practices and development methodologies

• You will be part of a growing high functional team, responsible for delivering various frontend products to the end-users. Simplifying complex workflow and make it easy for the end-users.
• The team designs and develops various products from - financial apps targeted to invoice users, data-heavy app oriented to operational and support teams, a productivity app for sales teams,
• SDK that will be integrated into third-party apps, etc.
• You will work with business, product, and backend teams to work on new features and products.
• You are expected to drive the products to maximize its business impact and customer delight.
• You are expected to stay on top of tech innovations in the Web development space, experiment them and make suitable suggestions to enhance tech stack. Research and propose software programs that are compatible with future technologies.

• Design and implement Single Page Applications (SPAs) using modern JavaScript frameworks
• Integrating data from various back-end services
• Develop a simple-to-use user interface for a complex product, apply new technologies, best design practices and usability patterns
• Contribute to end-to-end system architecture, working with/as cross-functional teams
• Collaborate with UX teams, product managers and other technical teams to create optimized and delightful user experiences
• Apply expertise of HTML5, bootstrap/foundation CSS frameworks
• Analyze the performance of layers in the frontend, backend and engineer designs/code to solve them
• Work with the product team to build flow and detail out the requirements
• Conversant with development for desktop and mobile browsers and hybrid apps.

• Proven working experience in web programming
• Top-notch programming skills and in-depth knowledge of modern HTML/CSS
• Solid understanding of how web applications work including security, session management, and best development practices
• Working with respectable size Single Page Application (SPA) project
• Expert in MVC like design patterns, modern JavaScript frameworks
• Hands-on experience with network diagnostics, network analytics tools
• Solid CS, OOP/OOD, design patterns
• Good grasp on usability and interaction design
• Track record in large-scale system software development
• Aggressive problem diagnosis and creative problem-solving skills
• Ability to work and thrive in a fast-paced environment, learn rapidly and master diverse web technologies and techniques

• Any framework - ReactJS, AngularJS, Backbone, Ember, VueJS
• DOM and Virtual DOM understanding
• API Integration. Understanding of session management. 

• Experience with server-side processing such as templating, packaging and delivery
• Some end-to-end system design experience, sensitive to security
• Experience working with webviews on Android and iOS
• Exposure to React Native
• Demonstrated visual design and layout skills
• Design and development of backend REST endpoint applications