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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 Experienced Flutter Developers with Strong knowledge of the Flutter framework, Background Services, Third-party libraries, Rest API.
The Flutter Mobile Developer will create multi-platform apps for iOS and Android using Google's new Flutter development framework.
Key Responsibilities:
- At least 2 yrs. of Flutter development experience are mandatory.
- Experience developing with Dart, whether with Flutter or for the web, is required.
- Deep experience contributing to and managing high-scale production mobile apps is desired.
- Be proficient in using version control and continuous integration, with tools such as Git and Bitbucket.
- Experience with third-party libraries and API implementation.
What we require:
- Able to self-manage and learn on his own.
- Can build Android and/or iOS apps using Flutter
- Proven working experience in Mobile app development
- Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies
- Solid understanding of the full mobile development life cycle
- Experience working in an agile development process.
- Good communication skills.
- Excellent knowledge of core Java and Flutter framework.
- Familiar with Android Studio.
- Good command over code standards and code and query optimization.
- Able to use third-party libraries if required.
- Ready to take on new challenges and problems too.
Job Summary:
Core Technical Skills
Strong JavaScript OR TypeScript experience (minimum 2 years)
Angular OR good balance of JS/TS + Angular skills
Understanding of HTTP requests & web technologies
Hands-on project experience in JavaScript ecosystem
Good to have (not mandatory):
Node.js
XPath
Puppeteer
Automation scripting exposure
Coding & Development Skills
Building and maintaining UI components
Writing clean, maintainable code
- Debugging & troubleshooting in production/test environments
Share Cv to
Thirega@ vysystems dot com - WhatsApp - 91Five0033Five2Three
React.js Developer Responsibilities:
● Identifying web-based user interactions.
● Developing and implementing highly responsive user interface components using react
concepts.
● Writing application interface codes using JavaScript following React.js workflows.
● Troubleshooting interface software and debugging application codes.
● Monitoring and improving front-end performance.
React.js Developer Requirements:
● In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.
● Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.
● Experience with browser-based debugging.
● Excellent troubleshooting skills
.
Job Location - Bangalore
Responsibilities
- Developing new user-facing features using React.js
- Building reusable components and front-end libraries for future use
- Translating designs and wireframes into high-quality code
- Optimizing components for maximum performance across a vast array of web-capable devices and browsers
Skills:
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
- Experience in GraphQL
- Thorough understanding of React.js and its core principles
- Experience with popular React.js workflows (Redux)
- Familiarity with newer specifications of ECMAScript
- Experience with data structure libraries (e.g., Immutable.js)
- Knowledge of isomorphic React is a plus
- Familiarity with RESTful APIs
- Knowledge of modern authorization mechanisms, such as JSON Web Token
- Familiarity with modern front-end build pipelines and tools
- Ability to understand business requirements and translate them into technical requirements
- A knack for benchmarking and optimization
- Familiarity with code versioning tools (such as Git, SVN, and Mercurial)
As a Senior Experience Technologist, you’ll be working as part of an agile team with other passionate, driven, and talented people, creating innovative solutions for our clients. Your primary responsibilities will include developing interactive web-based, mobile, and/or desktop applications using Sapient as well as industry best practices to deliver high value and quality to Publicis Sapient clients.
What are we looking for in you?
• Technical end-to-end design for stories by collaborating with business analyst/product owner, technical architect and clients
• Implement stories end-to-end, which includes Frontend, Backends for Frontend (BFF), Caching and also service orchestration in some cases) using best engineering practices like test-driven development, SOLID principles and consideration of non-functional requirements like performance, scalability, security or cloud readiness (as applicable) at the story level
• Automates testing at unit, module and integration level as needed using tools relevant for the platform (e.g. Jasmine, Jest, Karma, Webdriver.io etc.)
• Focus on quality by implementing best practices like logging, calling out technical debt, meeting KPIs using code quality tools like SonarQube, ESLint (customize and sync with Sonar), Stylelint/Sasslint and so on.
• Hands-on with automating redundant work, like common component structure, both in terms of scaffolding as well as using the right design patterns / creating abstractions.
• Mentor junior engineers in helping review code, guiding on technical decision making
Key Requirements:
• 4-9 years’ experience
• Hands-on knowledge of HTML5, CSS3, JavaScript
• Hands-on experience working with Object Oriented JavaScript (OOJS), JavaScript - and practical uses in building complex interactive experiences, primarily with ECMAScript 2015+. You should be up-to-date with new specifications (different stages), and also, using transpilers like Babel to use features from all stages
• Good understanding of creational and structural design patterns in JavaScript
• Experience working with Single Page Applications (SPA) with universal rendering capabilities.
• Good understanding of React.js, its core principles - lifecycle methods, virtual DOM etc. and at least 6 – 12 months hands-on experience with the same
• Understanding of one-way data flow and the Flux architecture.
• Understanding of stateful (container) vs stateless (presentational) components and how to break down the application page into components
• Core understanding of how React’s state management works out of the box.
• Understanding of different CSS architectures that go hand-in-hand with React.js application development. Pros and cons of component-level CSS vs global and where to apply each
• Thorough understanding of Webpack bundler (version 2+).
• Good understanding of the Web Components standard.
• Hands-on experience with building Progressive Web Apps (PWAs) on any framework.
• Hands-on experience with Frontend Performance Optimization – especially in a React application with respect to resource loading strategy, CPU/Memory profiling on the browser.
• Hands-on experience with test-driven development using Jest or equivalent. Familiar with snapshot testing, code coverage. Experience working with utilities like Enzyme
• Experience using fluid grids, and building responsive/adaptive websites using Bootstrap etc.
• Understanding of SEO and accessibility and making it part of the development workflow
• Moderate to Strong graphics manipulation/optimization skills using Photoshop is a plus.
Knowledge & experience of the below skills will earn additional brownie points:
• Logically understands relational databases like MySQL and non-relational databases like MongoDB and can manage to work with it.
• Hands-on experience with GraphQL.
• Hands-on experience working with client-side templating languages like Handlebars, Mustache, etc.
• Hands-on experience with Functional Programming (FP)
• Hands-on experience working with frontend build systems and automating the same using any task runner
• Understanding of hybrid vs native mobile apps – and pros/cons with respect to PWA.
Hands-on experience working with server-side JavaScript frameworks like Express, Koa, Hapi etc. (based on Node.js
• Good understanding of REST APIs and Microservices. Should have an understanding of how resources are organized and how an application should align based on the same. You are expected to have an understanding of how CRUD operations map to HTTP methods for a well-designed service.
• Hands-on with DevOps pipeline and able to tweak/change build/deployment pipeline as needed in the context of a module (e.g. Jenkins / Travis / Now.sh / Gitlab)
• Experience with configuring Webpack from scratch and working knowhow of Rollup / Parcel.
Education:
Bachelors in Computer Science or equivalent education covering Math, Algorithms, Data Structures, Networking, Databases, Operating Systems, Graphics.
About us: At Publicis Sapient, we enable our clients to thrive in Next and to create business value through expert strategies, customer-centric experience design, and world-class product engineering. The future of business is disrupting, transforming, platforming, and becoming digital to the core. We see it in every major industry, from financial services to automotive, consumer products, retail, energy, and travel. We are looking for people who have the courage to break out of what has always been to go do what will be. If you have an optimism that says there is no limit to what we can achieve in this exciting time, then we should talk. Our work is fueled by challenging boundaries, multidisciplinary collaboration, highly agile teams, and the power of the newest technologies and platforms. Our people thrive because of the belief that it’s both our privilege and
responsibility to usher our clients and the world into Next. We are seeking those deeply skilled, bold, collaborative, flexible, and who want to reimagine the way the world works to help businesses improve the daily lives of people, and the world. This is the world-class engineering team where you should build your career.
- HTML & Java script. Experience with basic GMB etc. PHP exposure. Willingness to work on app and plug –ins etc is welcome.
- Custom Module development
- Front End Development skills (any of below):
- HTML5, PHP
- Shopify
- Magento (1.x & 2.x)
- Big Commerce
- Wordpress
- Server Setup
- Collaborate with product, design, and other engineering teams to brainstorm and resolve complex problems.
- Ensure the quality of code is up to the highest standard of readability, conciseness, efficiency, modularity, and extensibility.
- Experience with the entire Software Development Life Cycle (SDLC)
- Solid communication skills: Demonstrated ability to explain complex technical issues to both technical and non-technical audiences
- Talking to customers and business teams to suggest improvement areas in product flows.
- Create peer learnings for team members and build context for new teammates
- Help with building the company's tech team and iterating on the hiring framework.
- Provide regular feedback to your team (peers and managers) to ensure continuous improvement.
- Keeping abreast with the latest technologies and working on your skills regularly.
Must-haves
- At least 3 years of experience working in frontend for desktop and mobile web.
- Familiar with design tools and convert them to actual code (HTML+CSS+JavaScript)
- Mastery in DOM Manipulation (including Jquery) and understand components, CTAs.
- Well-versed in other non-vanilla languages (ex. TypeScript)
- Well-versed in standard frontend framework (ex. ReactJS)
- Understanding of GraphQL APIs.
- Deep understanding of web technologies in various mobile systems
- Have empathy for the users you build for
Good to have
- Experience in the fintech industry
- Experience leading design and implementation of robust and secure web services.
Roles & Responsibilities :
- Write high quality code in ReactJS using TypeScript or JSX that is easy to maintain and test.
- Participate in an Agile environment using Scrum software development practices, Automated unit testing, Continuous integration, Code reviews, Version control systems, Automated build processes. Raise issues proactively that might impact delivery commitments.
- Fix production issues and maintain the code as needed .
Basic Qualifications:
- BS degree in CS or equivalent work experience 5+ years professional experience building single page applications in ReactJS using TypeScript or JSX with extensive experience working with HTML5 and CSS3.
- Experience working with cross-browser behaviors and quirks.
Preferred Qualifications:
- Passion for new technologies. Product development experience building large scale web applications.
- Experience designing and developing highly scalable consumer facing web application. Care deeply about writing high-performance, reusable code for components that will be used across our product.
- GraphQL experience is preferred.
- Excellent knowledge of multiple technologies like .NET 4.0-4.6, ASP.NET, MVC, CSS, C# .NET, VB.NET, AJAX, JQuery, AngularJS, ADO .NET, Entity Framework.
- Working Knowledge in MVC Architecture will be preferable.
- Experience in Web Services, WCF, Web API.
- Experience in Windows Forms, WPF.
- Experience in JavaScript, Ajax, JQuery.
- Working knowledge in SQL queries Stored Procedures, with a strong background in SSRS/SSIS report writing.









