Frontend 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).

Job Summary:

We are looking for a passionate Frontend Engineer with 2 to 4 years of experience to build high-quality, scalable, and user-friendly web applications. You will work closely with cross-functional teams to bring ideas to life using modern JavaScript frameworks, maintaining best-in-class UI standards, performance, and code quality.

Website: https://www.thealteroffice.com/about

Key Responsibilities:

• Develop and maintain modern, high-performance, and responsive web applications using JavaScript frameworks such as React, Vue, or Next.js.
• Translate product designs from tools like Figma into pixel-perfect, accessible, and consistent UI components.
• Build reusable components and contribute to shared design systems or UI libraries.
• Manage state effectively using tools like Redux, Zustand, or Context API.
• Ensure applications are responsive, cross-browser compatible, and adhere to accessibility standards (WCAG).
• Optimize frontend performance using tools like Lighthouse, Web Vitals, and browser profiling.
• Use TypeScript to write type-safe and scalable code.
• Write unit, integration, and E2E tests using frameworks like Jest, Testing Library, Cypress, or Playwright.
• Work with backend teams to design APIs and ensure efficient, secure frontend-backend integration.
• Implement frontend security best practices, such as XSS protection and CSP.
• Use tools like Tailwind CSS, Framer Motion, and Styled Components for rapid, modern UI development.
• Contribute to CI/CD workflows, version control using Git, and deploy applications using platforms like Vercel, Netlify, or Firebase.
• Participate in code reviews, share knowledge, and help drive technical excellence across the team.

Requirements:

• 2 to 4 years of experience building and shipping frontend applications in a professional setting.
• Proficiency in JavaScript (ES6+), HTML5, and CSS3, with a strong understanding of modern frontend architecture.
• Hands-on experience with at least one JavaScript framework/library (React preferred).
• Strong knowledge of TypeScript and state management tools.
• Solid understanding of UI/UX best practices, including responsive design, performance, and accessibility.
• Experience with testing methodologies and automation tools.
• Familiarity with design systems, component libraries, and modern build/deployment tools (Webpack, Vite, Vercel, etc.).
• Comfortable working in agile teams, collaborating with designers, product managers, and backend engineers.

Experience: 3.5 - 5 years

Description :

- Very good experience in design and development on UI front end Technologies.

- Minimum 3+ Years of web application development using HTML 5, CSS3, Bootstrap, JavaScript.

- Experience in development of Angular 2/4/6.

- Expertise in Responsive web design, HTML5, and CSS pre-processors SASS and LESS

- Good in UML, OOPS, design principles and patterns, architectural trends and data modeling.

- Strong in JavaScript (object oriented concepts) & JavaScript optimization

- Experience on JavaScript frameworks such as AngularJS, ReactJS, NodeJS etc.

- Ability to convert Wireframes in to UI design

- Good designing capabilities using Bootstrap framework, SEO and using strategies for cross-platform design initiatives with a 360-degree digital design

- Strong experience with debugging skills and fixing Cross Browser Compatibility issues and Optimization for web by using best practices

- Good Communication

- Good knowledge of quality standards and best practice

• Ability to program in JavaScript 
• Knowledge of markup languages like HTML and XML 
• Familiarity with stylesheet languages like CSS
• Web development tools and techniques like .NET and AJAX 
• Cloud computing expertise

Job for Front end Developer

WFH

Lead Front end engineers

Skill sets are:

• Typescript
• Javascript
• React
• Redux - global state management experience.

Good to have Back End Javascript experience as well as there might be times when the front end team has to do some back end work (which is the bulk of engineering work).

• Front End Lead (who is a PM / Scrum Master)
• Sr. Front End person who can do Client Interaction i.e. good Communication Skills.
• UI Engineer / Architect who has evolved as a Manager who can take care of Delivery of Front End team only.
• This role will interact with the Product Team to understand the product requirements so that he can be the point of contact for Product Requirements.

• Experience in developing apps using Reactjs with Redux, React hooks, react-router with Javascript ES6

• Developing new user-facing features using React.js

• Integrate APIs with frontend components using React.js

• Ensuring user experience determines design choices.

• Developing features to enhance the user experience.

• Striking a balance between functional and aesthetic design.

• Ensuring web design is optimized for smartphones.

• Building reusable code for future use.

• Optimizing web pages for maximum speed and scalability.

• Utilizing a variety of markup languages to write web pages.

• Maintaining brand consistency throughout the design.

• Degree in computer science or related field.

• Understanding of key design principles.

• Proficiency in React.js,HTML, CSS, JavaScript, and jQuery.

• Understanding of server-side CSS.

• Experience with graphic design applications such as Adobe Illustrator.

• Experience with responsive and adaptive design.

About CercleX:-

CercleX is a digital technology platform which is a leading https://cerclex.com/blog/waste-management-in-india/">waste management company in India  with an extended outlook of circularity through its various ventures into the field of sustainability.

We have received FICCI Impactful Cleantech Startup Award, MeitY Emerging Startup Award, TVS Capital Budding Nxt Gen Entrepreneur Award, and many more for our digital solutions enabling transactions between waste generators, and aggregators, processors, and bringing in complete transparency, traceability to the waste ecosystem.

https://play.google.com/store/apps/details?id=com.scrapmarketCCX">Cercle X ScrapMarket is an app that helps you buy and sell scrap by connecting 100% verified buyers and sellers of scrap across India. CercleX helps brands to accomplish their sustainability targets with https://cerclex.com/extended-producer-responsibility/">Extended Producer responsibility and research solid waste managemet on the environment to ensure the environment is eco-free.

Looking for a dynamic go-getter attitude UI developer with at least 3+ years of product development experience in building great UI with neat code.

RESPONSIBILITIES
Product design and development
Work on different areas of the platform
Build, optimise and enhance the UI performance

• 3+ years of experience in product development
• Experience with Angular 2+, Ionic 3+ is must
• Working with RESTful web services within web applications
• Should be comfortable working with git
• Should enjoy hacking things together to create a proof of concept, but always good at quality production code
• Capable of executing tasks with minimal guidance