React.js Developer

Position Title : Frontend / Chrome Extension Developer (React + TypeScript)

Experience : 3+ years

Location : Remote

Job Role Summary :

Build and ship production-ready Chrome extensions that inject UI into existing web apps. Own content scripts, DOM integration, performance, and accessibility (WCAG 2.1 AA).

Mandatory Skills :

React, TypeScript, Chrome Extensions (MV3), Content Scripts, DOM Injection, MutationObserver, TailwindCSS/CSS Modules, Accessibility (WCAG 2.1 AA).

Key Responsibilities :

• Develop Chrome extensions using React + TypeScript.
• Inject and manage UI components within third-party web app DOMs.
• Write and maintain content scripts; handle dynamic pages via MutationObserver.
• Implement clean, responsive styling with TailwindCSS or CSS Modules.
• Ensure accessibility (WCAG 2.1 AA), keyboard navigation, and ARIA semantics.
• Integrate with APIs, manage extension permissions, storage, and messaging.
• Optimize performance, handle edge cases across sites, and write basic tests.

Required Skills :

• Strong React + TypeScript in production.
• Chrome Extension architecture: manifest v3, content/background scripts, messaging, permissions.
• DOM manipulation and safe UI injection strategies.
• MutationObserver, event delegation, handling SPA route changes.
• TailwindCSS or CSS Modules; solid CSS fundamentals.
• Accessibility (WCAG 2.1 AA) and cross-browser compatibility (Chromium/Firefox optional).
• Familiarity with build tooling (Vite/Webpack), linting, and Git.

Nice-to-Have :

• Experience with service workers, storage (sync/local), and i18n.
• Testing with Jest/RTL/Playwright.
• Security basics for extensions (CSP, sandboxing).

·      7+ years of professional experience in front-end development.

·      5+ years of hands-on experience with React.js and its ecosystem (Redux, Context API, Hooks, etc.)

·      Strong understanding of JavaScript (ES6+), HTML5, and CSS3.

·      Experience with RESTful APIs, GraphQL, and WebSocket integration.

·      Proficiency in modern build tools (Webpack, Vite, Babel, etc.).

·      Expertise in state management libraries (Redux, MobX) and React Query.

·      Solid understanding of UI/UX principles and responsive design.

·      Experience with testing frameworks (Jest, React Testing Library, Cypress, etc.).

·      Familiarity with modern CI/CD pipelines and version control tools (Git).

About Gyaan:

Gyaan empowers Go-To-Market teams to ascend to new heights in their sales performance, unlocking boundless opportunities for growth. We're passionate about helping sales teams excel beyond expectations. Our pride lies in assembling an unparalleled team and crafting a crucial solution that becomes an indispensable tool for our users. With Gyaan, sales excellence becomes an attainable reality.

About the Job:

Gyaan is looking for a Senior React JS developer to join our dynamic team! As a Senior React JS developer, you will be responsible for building components and modules using React and associated tooling (Redux, React-query, Indexed-DB, Material-UI). Team management and Mentoring experience is required.

Responsibilities:

• Build components and modules using React.
• Building the core front-end infrastructure, design systems, and libraries.
• Convert Figma designs into reusable front-end components.
• Translation of designs and wireframes into high-quality code.
• Collaborate closely with designers, engineers, founders, and product managers.
• Take ownership of products and features & releases, Should be able to mentor junior developers, Code reviews, Feature Review & Allocation of tasks.

Must-Have Skills:

• 4-6 years of production experience with React JS and associated tooling (Redux, React-query, Indexed-db, Material-UI)
• 3+ years of Typescript experience, including asynchronous programming, closures, types, and ES6/ES7.
• Thorough understanding of React.js and its core principles, including virtual DOM, data binding, State & Props and React Lifecycle and Redux.
• Experience with front-end technologies such as HTML5, JSS, CSS etc.
• Experience consuming and transforming internal and 3rd party API's using REST
• Experience with code quality and reusability practices (eslint, prettier, CI/CD for front-end repos)
• Knowledge of cross-browser compatibilities, responsiveness, and web accessibility standards.
• Good experience of Front-end/React best practices, code reviews, design documentation, debugging, troubleshooting, and agile development
• Communication: You like discussing a plan upfront, welcome collaboration, and are an excellent verbal and written communicator.
• Good to have If you have implemented complex features like authentication/authorization, I18N, logging, security, and testing into developer boilerplates to minimize production errors.

Qualifications:

• Bachelor’s degree in Computer Science or equivalent experience.

If you are passionate about solving problems and have the required qualifications, we want to hear from you! You must be an excellent verbal and written communicator, enjoy collaborating with others, and welcome discussing a plan upfront. We offer a competitive salary, flexible work hours, and a dynamic work environment.

Apply now and join our team of skilled professionals!

If this role interests you, kindly apply on below link & also review JD & company details:

https://gyaan.keka.com/careers/jobdetails/17678

Job Title: UI Developer

Experience: 4 to 6 Years

Location: Bangalore

Notice Period: Immediate to 30 Days

Job Description:

We are seeking a skilled and passionate UI Developer to join our growing team. The ideal candidate will have strong experience in front-end development with a focus on creating dynamic, responsive, and user-friendly interfaces using JavaScript, HTML, CSS, and AngularJS.

Key Responsibilities:

• Develop and maintain scalable and high-performance UI components.
• Collaborate with UX designers, product managers, and backend developers to deliver high-quality user interfaces.
• Ensure consistent styling and responsive design across platforms and devices.
• Optimize application for maximum speed and scalability.
• Debug and troubleshoot UI-related issues and performance bottlenecks.
• Participate in code reviews and contribute to best practices in UI development.

Required Skills:

• 4–6 years of hands-on experience in JavaScript, HTML5, and CSS3.
• Strong working knowledge of AngularJS and ability to work on Angular-based projects.
• Experience with responsive design principles and cross-browser compatibility.
• Proficiency in version control tools like Git.
• Familiarity with RESTful APIs and integration with backend services.
• Good understanding of UI/UX principles.

About Deqode

At Deqode, we work on cutting-edge solutions that are redefining the digital frontier. Our team thrives on innovation, collaboration, and creating next-gen products that solve real-world problems. We are now looking for a skilled and passionate React.js Developer to join our growing frontend team.

Roles & Responsibilities

• Take complete ownership and delivery of front-end applications.
• Ensure optimized performance across mobile and desktop platforms.
• Write clean, tested, and well-documented code using JavaScript, HTML, and CSS.
• Collaborate with UI/UX designers, HTML coders, and backend developers to bring designs to life.
• Integrate RESTful APIs and work seamlessly with backend teams.
• Communicate and integrate with third-party web services.
• Build and manage infrastructure for serving frontend apps and assets.
• Maintain frontend application deployment and ensure build pipeline automation.
• Use JSDoc or similar tools for inline documentation of code.
• Write extensive unit tests following Test-Driven Development (TDD) best practices.
• Design and automate the frontend build process using tools like Webpack/Gulp/Grunt.

Required Skills & Qualifications

• 3+ years of experience developing production-level web applications.
• Strong command over React.js or Vue.js, JavaScript, HTML5, CSS3.
• Deep understanding of DOM APIs, native JavaScript, and popular libraries.
• Proficiency in CSS preprocessors (SASS/LESS) and modular CSS (CSS Modules).
• Familiarity with build tools like Webpack, Gulp, or Grunt.
• Experience creating modular, self-contained, and reusable components.
• Strong understanding of cross-browser compatibility and performance optimizations.
• Clean, organized, and maintainable code practices.
• Bonus: Working knowledge of Node.js and backend concepts like APIs, databases, caching layers, and proxies.
• Comfort in implementing pixel-perfect designs, animations, and smooth transitions.
• Excellent communication and teamwork skills.
• A proactive mindset with the ability to work both independently and in a team.

Qapita is a SaaS-Net startup with offices in India & Singapore. Qapita’s vision is to transform how equity is managed and traded in the private capital markets in this region. Qapita’s software solution seeks to automate the equity management process for startups including workflows around CapTables, ESOPs, Due-diligence, and transactions. Qapita’s market place solution seeks to facilitate liquidity to ESOP holders and shareholders via structured liquidity programs and secondary transactions. Qapita seeks to automate all processes for equity matters in private markets via its digital platform.

We are looking for a Senior Frontend Developer who is curious, craves for new challenges and loves to solve problems using latest technology. In this role, you will be responsible for developing and implementing user interface components using React.js concepts and workflows such as Redux, Flux, and Webpack.

You will also be responsible for profiling and improving front-end performance and documenting our front-end codebase.

Our Tech stack:

Frontend: React, Typescript, Html, SCSS

Backend: Linux (Ubuntu), ASP.NET Core, C#, Nginx, MongoDB, EventStoreDB

Responsibilities: As a Senior Frontend Developer, you will be

• Meeting with the development team to discuss user interface ideas and applications.

• Reviewing application requirements and interface designs.

• Identifying web-based user interactions.

• Developing and implementing highly-responsive user interface components using React concepts.

• Writing application interface code using TypeScript following React.js workflows.

• Troubleshooting interface software and debugging application code.

• Developing and implementing front-end architecture to support user interface concepts.

• Monitoring and improving front-end performance.

• Documenting application changes and developing updates.

Desired Skills and Experience :

• Bachelor's degree in Computer Science, Information Technology, or a similar field.

• Previous experience working as a React.js Developer (4+ years).

• In-depth knowledge of JavaScript, CSS, HTML and front-end languages.

• Knowledge of TypeScript a plus.

• Knowledge of React tools including React.js, Webpack, Redux.

• Knowledge of performance testing frameworks including Mocha and Jest.

• Experience with browser-based debugging and performance testing software.

• Excellent troubleshooting skills.

• Develop new user -facing features
• Build reusable code and libraries for future use
• Ensure the technical feasibility of UI/UX designs
• Optimize application for maximum speed and scalability
• Assure that all user input is validated before submitting to back-end
• Meeting with the development team to discuss user interface ideas and applications.
• Reviewing application requirements and interface designs.
• 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.
• Developing and implementing front-end architecture to support user interface concepts.
• Monitoring and improving front-end performance.
• Documenting application changes and developing updates.

• Bachelor’s degree in computer science, information technology, or a similar field.
• Minimum 2 years experience working as a react.js developer.
• In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.
• Knowledge of REACT tools including React.js, Web pack, Enzyme, Redux, and Flux.
• Experience with user interface design.
• Knowledge of performance testing frameworks including Mocha and Jest.
• Experience with browser-based debugging and performance testing software.
• Excellent troubleshooting skills.
• Good project management skills.
  
  About Haber
  At HABER, we are solving the challenges of tomorrow, today. We are bringing together the best minds in process, engineering, computing and chemistry to develop solutions to address some of the world’s toughest challenges – water and energy scarcity and sustainability. Over the past few years there has been an explosion in unstructured data across industry driven by affordable sensing technologies and adoption of analytical instrumentation. This sudden increase in data has resulted in industries spending significant amounts of time collecting, organizing and analysing content and very little time driving value with the data. HABER is focused on reversing this trend by helping our customers spend less time collecting and analysing data and more time using HABER’s platform to drive efficiency, identify issues before they happen and uncover hidden potential. Follow us on Twitter @haber_tech or LinkedIn at linkedin.com/company/haber-technologies or visit us at haberwater.com/careers
  
   

• Looking for 0-30 Days and Immediate joiners
• Minimum total experience should be 7 Years
• Overall with 4+ years experience in HTML, CSS and JavaScript and OOJS
• 2+ years' experience working with any JavaScript framework/library, preferably ReactJS or VueJS
• In-depth understanding of JavaScript, HTML5, CSS3 (pre-processors LESS/SASS) and relevant concepts.
• Proficiency with browser based debugging.
• Understanding of progressive web apps.
• Experience with a testing framework (Jest/Mocha).
• Experience using Git

Responsibilities

• Delivering a complete front end application
• Ensuring high performance on mobile and desktop
• Writing tested, idiomatic, and documented JavaScript, HTML and CSS
• Coordinating the workflow between the graphic designer, the HTML coder, and yourself
• Cooperating with the back-end developer in the process of building the RESTful API
• Communicating with external web services

Skills and Qualifications

• Proficiency with JavaScript and HTML5
• Professional, precise communication skills
• Deep knowledge of AngularJS practices and commonly used modules based on extensive work experience
• Creating self-contained, reusable, and testable modules and components
• Ensuring a clear dependency chain, in regard to the app logic as well as the file system
• Ability to provide SEO solutions for single page apps
• Extensive knowledge of CSS and JS methods for providing performant visual effects and keeping the framerate above 30fps at all times
• Thorough understanding of the responsibilities of the platform, database, API, caching layer, proxies, and other web services used in the system
• Validating user actions on the client side and providing responsive feedback
• Writing non-blocking code, and resorting to advanced techniques such as multi-threading, when needed
• Creating custom, general use modules and components which extend the elements and modules of core AngularJS
• Experience with all levels of operation available to the front-end, such as from creating XHRs in vanilla JS to using a custom wrapper around $resource
• Experience with building the infrastructure for serving the front-end app and assets
• Architecting and automating the build process for production, using task runners or scripts
• Documenting the code inline using JSDoc or other conventions
• Writing extensive unit tests using automated TDD tasks
• Creating e2e test suites for all components, and running them with Protractor (or a well reasoned alternative)
• Creating configuration, build, and test scripts for Continuous Integration environments