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).

Strong React Native Frontend / Mobile Developer Profile

Mandatory (Experience 1) – Must have minimum 5+ YOE in React Native with JavaScript (including ES6+ syntax).

Mandatory (Experience 2) – Must have 4+ years of hands-on native mobile development experience for both Android and iOS platforms

Mandatory (Skills 1) – Must have expertise in state management using React Hooks & Redux for efficient data flow.

Mandatory (Skills 2) – Must have experience in publishing apps to Play Store and App Store.

Mandatory (Education) - B.E / B.Tech

Mandatory (Note) - Considering candidates from South India only

React JS Developer

📍 Location: Bangalore

💼 Experience: 4+ Years

📅 Notice Period: Immediate to 30 Days

Job Summary:

Experienced React JS Developer with 4+ years of hands-on experience in building scalable, high-performance web applications. The ideal candidate should have strong expertise in modern JavaScript, React ecosystem, and front-end best practices.

Key Responsibilities:

• Develop and maintain responsive web applications using React.js
• Build reusable components and front-end libraries
• Optimize components for maximum performance across devices and browsers
• Work closely with backend developers and UI/UX designers
• Integrate REST APIs and third-party services
• Write clean, maintainable, and scalable code
• Participate in code reviews and Agile ceremonies

Required Skills:

• 4+ years of experience in front-end development
• Strong proficiency in JavaScript (ES6+)
• Hands-on experience with React.js, Redux / Context API
• Experience with HTML5, CSS3, Bootstrap / Tailwind
• Knowledge of RESTful APIs integration
• Familiarity with Git and version control systems
• Understanding of Agile/Scrum methodology

Software Engineering

• 4+ years of experience in designing, developing, and maintaining React-based applications
• 4+ years of hands-on experience in developing medium to large-scale applications using Javascript frameworks
• Experience with projects that involve, improving the reliability and performance of your web-apps, by leveraging different observability tools like Lighthouse, Sentry, and Datadog.
• Good understanding of functional programming paradigms and UI architecture patterns
• A decent understanding of cloud infrastructure like AWS to orchestrate and manage our applications.
• Experience with testing frameworks like JEST, modern auth mechanisms, and server-side rendering through frameworks like NextJS
• Experience with backend technologies like JAVA, and Kotlin would be good to have.

Product Development

• Ability to scope, review and refine user stories for technical completeness and to resolve dependency risks.
• Well-versed in working in an agile environment and being involved in different stages of SDLC - Design, Development, Code Review, Testing, and Release Management
• Ability to work with different CI/CD frameworks, with hands-on experience with Git or any similar source code management tools
• Continuously refactor applications so that they are easy to maintain, easy to extend, and contribute to

Your Tech Stack

Web Application Frameworks: React, Ruby on Rails

Programming Languages: ReasonML/Rescript, Typescript, Javascript, Kotlin, HTML, CSS

Tools and Libraries: Webpack, Sentry, NextJS, NodeJS, Jest, Figma

Communication: HTTP, GraphQL, Amazon SQS, Amazon SNS

Observability: Google Analytics, Lighthouse, Sentry, Kibana, Datadog

What you will build with us?

The front-end platform at Porter is geared toward developing a variety of products for customers, partners, and our internal teams. You will be a part of Porter’s Web Engineering Platform team.

What will be your primary focus?

1. enabling our engineering teams to create highly reliable and scalable software systems, reduce client and server outages and increase system hygiene.
2. building the right set of tooling and flows for our web and mobile teams, for improving developer productivity. This will enable our application teams to churn out user features rapidly and will help them build the best-in-class product solutions for our business teams.
3. work on security initiatives, to protect information and information systems from unauthorized access, use, disclosure, disruption, modification, or destruction in order to provide confidentiality, integrity, and availability.

What will you closely influence?

1. Providing the right user experience to our customers, partners, and cc agents when they reach out to us
2. Building tools to help boost user growth on our platform including our driver onboarding, training and certification system, referral system, and lead management models. A step towards sustainable user growth and providing personalized experiences, on our platform
3. Unlocking new growth levels for Porter, in form of our new vibrant customer base through business initiatives like Packers and Movers, Part-Load, and help Porter on its journey to becoming a super Logistic App.
4. Enabling us to engage our partner ecosystem better with our fast-moving initiatives in the Insurance and Lending segments. Your work here will directly impact the livelihood of our partners
5. Solving problems related to optimal pricepoint for partners and customers, matchmaking with supply and demand, and building confidence around payment experience and location tracking.

• 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.

Our client is India's first one-stop-shop for corporate benefits. They create mutually rewarding relationships between employers and businesses by managing corporate discounts. They enable organizations to incentivize their employees beyond just salary by providing benefits related to Travel, Entertainment, Dining, Education, Shopping and many more spheres of life.

Founded in 2014, this Gurugram based employee rewards platform is led by young founders who are UCLA alumni with experience in companies like Microsoft US, Oracle, Symantec, Amazon, and Reliance. They've partnered with over 10000+ brands across dining, shopping, entertainment, wellness and many more providing exclusive employee discounts, brands like CCD, Samsung, Lifestyle, Flipkart, PVR Cinemas, Zoomcar, OYO, Lifestyle, Mother's Pride, Max Healthcare and more. Our client is leading the $2 billion rewards market in India with 250+ corporate clients including giants like Concentrix, EY, DXC and Mphasis, and they've raised $2 million to date from prominent VCs like GrowX Ventures, Sprout Ventures, and Axilor Ventures.

As a Software Engineer - VP Front End, you will be building world-class websites using JS frameworks.

What you will do:

• Creating modern flat UI.
• Development of the front-end of our application and our public websites.
• Testing the website to ensure it is working.
• Taking ownership of the code your write & features you build.
• Pioneering product ideas, participating in the design and implementing them.
• Strengthening and improving the architecture of our front-end.
• Strengthening and improving development and releasing processes within the team.
• Collaborating with the team and communicate effectively.

What you need to have:

Experience: 2 to 7 years