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).

Hi,

Please refer to the below Job description and revert with you updated resume –

About Client: Digital accelerator to Startups, SMEs, MSMEs, and large enterprises with a significant contribution across 22+ industries including BFSI, Healthcare, Ecommerce & Retail, Education & eLearning, Insurance, Tech Startups, Government & Semi-Government, and more. Backed with an impressive experience of 25+ years and a fast-growing family of 4000+ engineering professionals our capabilities span across IT Consulting, Strategy Planning & Execution, Business Process Re-engineering, IT Modernization, and Business Analysis Consulting, our solutions are devised meticulously to address the needs of specific industries.

We are a CMMI Level 5 organization global IT Solution provider and Outsourcing company headquartered in Mumbai and footprints with 10 delivery centres in India and 15 global offices. Our success portfolio boasts of 7500+ projects accomplished across 1500+ clients in 50+ countries with client retention rate as high as 85%

Location: Navi Mumbai, CBD Belapur

Domain: Banking (Payment Gateway Project)

NOTE: 1st and 3rd Saturdays working as per banking norms

Education: B.E. or Graduation in Computer Science or related field

job Summary:

We are seeking a talented and motivated React.js Developer to join our development team. The ideal candidate will be responsible for designing and developing user interface components using React.js concepts and workflows such as Redux, Flux, and Webpack. You will ensure that these components and the overall application are robust and easy to maintain.

You will coordinate with the rest of the team working on different layers of the infrastructure, including back-end services and APIs. Therefore, a commitment to collaborative problem-solving, sophisticated design, and quality products is essential.

Key Responsibilities:

Develop new user-facing features using React.js.

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

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

Translate designs and wireframes into high-quality code.

Write clean, scalable, and maintainable JavaScript code.

Ensure the technical feasibility of UI/UX designs.

Collaborate with back-end developers and web designers to improve usability.

Debugging, troubleshooting, and enhancing application performance.

Stay updated with emerging trends and technologies in front-end development.

Skills and Qualifications:

Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model.

Thorough understanding of React.js and its core principles.

Experience with popular React.js workflows (such as Flux or Redux).

Familiarity with RESTful APIs and integrating them into front-end code.

Knowledge of modern authorization mechanisms, such as JSON Web Token (JWT).

Familiarity with modern front-end build pipelines and tools (e.g., Babel, Webpack, NPM, etc.).

Experience with code versioning tools such as Git.

Familiarity with browser developer tools and debugging.

Understanding of cross-browser compatibility issues and ways to work around them.

Familiarity with unit testing and testing frameworks (e.g., Jest, Enzyme, Cypress).

Ability to understand business requirements and translate them into technical requirements.

Preferred Qualifications:

Bachelor's degree in Computer Science, Software Engineering, or a related field.

Experience with TypeScript and GraphQL.

Experience with other JavaScript frameworks like Next.js or Gatsby.js.

Familiarity with CI/CD pipelines and containerized applications (e.g., Docker).

Good understanding of SEO principles and ensuring that application adheres to them.

Soft Skills:

Strong problem-solving skills and attention to detail.

Excellent communication and teamwork abilities.

Ability to work in a fast-paced environment and meet deadlines.

Open to learning new technologies and frameworks.

Position Overview:

As a Frontend Developer, you will be responsible for creating and implementing innovative user interfaces and ensuring the seamless integration of design and functionality. The ideal candidate should have a minimum of 1.5 years of experience in front-end development, with a strong proficiency in React, JavaScript, SCSS, HTML, frontend architecture design, and design concepts

Responsibilities:

Collaborate with the design and development teams to translate UI/UX designs into interactive web pages or applications.

Develop responsive web interfaces and ensure cross-browser compatibility.

Write clean, modular, and maintainable code using best practices and coding standards.

Optimize application performance and ensure scalability.

Conduct thorough testing and debugging to identify and fix issues.

Collaborate with backend developers to integrate frontend interfaces with server-side logic.

Stay up-to-date with the latest front-end technologies, trends, and frameworks.

Participate in code reviews and provide constructive feedback to improve code quality.

Work closely with stakeholders to understand requirements and propose effective technical solutions

Qualifications:

Bachelor's degree in Computer Science, Engineering, or a related field.

Minimum 1.5 years of experience as a Frontend Developer.

Strong proficiency in React, JavaScript, CSS, and HTML.

Solid understanding of frontend architecture design patterns and concepts.

Experience with frontend frameworks like Redux, Vue.js, or Angular is a plus.

Familiarity with RESTful APIs and asynchronous request handling.

Knowledge of version control systems (e. g., Git) and project management tools (e. g., Jira).

Ability to collaborate effectively with cross-functional teams.

Strong problem-solving skills and attention to detail.

Excellent communication and interpersonal skills.

Job Description

• • Collaborate with developers and UI/UX engineers to build scalable web apps
• • Design, implement and manage large applications with video streaming and complex state and high-frequency data
• • Experiment with large data sets to find interesting and valuable ways to visualize the data
• • Build reusable, testable React components that can be used between projects
• • Contribute towards building the company’s coding culture.
• • Mentor, groom junior developers and participate in code reviews

Requirements

• • 3+ years of relevant industry experience
• • A deep understanding of JavaScript
• • React, Redux or other JS framework experience
• • HTML5, CSS/SASS, Restful APIs, HTTP
• • JEST or other testing experience
• • Experience with android app development
• • Experience with CI/CD
• • Experience with Mathjax/Latex
• • Experience with large scale video streaming
• • Understanding of i18n, A11Y
• • Excellent understanding of cross-browser compatibility issues
•  

• Designing, developing, and testing UI for mobile and web applications
• Build reusable code and libraries for future use
• Accurately translate user and business needs into functional frontend code.
• Developing new user-facing features using React and redux
• Building reusable components and front-end libraries for future use.
• Translating designs and wireframes into high-quality code with proper standards.
• Optimizing components for maximum performance across a vast array of web-capable devices and browsers.
• Work with outside data sources and APIs.
• Added Advantage: Knowledge and experience in Cloud Computing

We are looking for a skilled react.js developer to join our front-end development team. 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.

• 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.
• Previous 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, Webpack, Enzyme, Redux, and Flux.
• Experience with user interface design.
• Experience with browser-based debugging and performance testing software.
• Excellent troubleshooting skills.
• Good project management skills.

JavaScript

- ReactJS

- Redux-Saga

- ES6 (or TypeScript) syntax

- Good problem-solving

- Good debugging

Good to have :

- TypeScript experience

- Material UI experience

- JEST knowledge

- Git and Github/Gitlab/Bitbucket experience

• 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
• Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
• Experience with popular React.js workflows (such as Flux or 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
• Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
• Ability to understand business requirements and translate them into technical requirements
• A knack for benchmarking and optimization
• Ability to work through new and difficult React Native Issues and contribute to libraries as needed.
• Ability to create and maintain continuous integration and delivery of React Native applications.

Purpose of the Role

To design and implement the Peak AI System - a new system of intelligence that allows companies to quickly harness the power of AI.

The Opportunity 

Peak are a Decision Intelligence company - where we are democratising AI for every business and building a great company that everyone loves being part of. We are on a mission to help organisations use AI to make great commercial decisions, all the time. Just as importantly, we are also focused on building an amazing company: one where we truly value our people & culture, and strive to make an amazing and diverse place to work. Our recent Best Companies award & World class accreditation for being one of the top companies to work for is a testament to this.

We have ambitious plans over the coming years - to create and lead a new category of enterprise software; the decision intelligence system (Decision Intelligence), expand our operations and create the best working culture possible. This is a great time to join Peak and the Engineering team, as we start the next stage of our global growth.

The Role

Based in Jaipur or Pune, you will be working in a collaborative team on cutting edge technologies in a supportive and dynamic environment. Ultimately you are responsible for building the CODI and on-boarding new clients - this involves:

• Developing a good understanding of the solutions which Peak delivers, and how these link to Peak’s overall strategy.
• Making suggestions towards shaping the strategy for a feature and engineering design.
• Managing own workload and usually delivering unsupervised. Accountable for their own workstream or the work of a small team.  
• Understanding Engineering priorities and is able to focus on these, helping others to remain focussed too
• Acting as the Lead Engineer on a project. Helps ensure others follow Peak processes, such as release and version control.
• An active member of the team, through useful contributions to projects and in team meetings.
• Supervising others. Deputising for a Lead and/or support them with tasks. Mentoring new joiners/interns and Masters students. Sharing knowledge and learnings with the team.

Required Skills and Experience

We are building a team of world class engineers in Jaipur, essentially we are looking for bright, talented engineers looking to work at the cutting edge of practical AI.

• Acquired strong proven professional Front End Development experience.
• Proven track record and experience working on Javascript and front end frameworks like React (preferred) and Angular
• Knowledge and experience working with Node.js, Go or any other back end programming language is a plus .
• Experience of turning UI/UX designs to applications and keen interest in the UI/UX side of an application. 
• Able to build prototypes quickly and work with the product teams to test a concept. 
• Demonstrable experience in building front end or UI/UX development practices in previous jobs. 
• Building and implementing a product on cloud based infrastructure.
• Good understanding of Microservice Architecture, Cloud Technologies, CI/CD and Serverless.
• Ability to document requirements and specifications.
• A naturally inquisitive and problem-solving mindset.
• Strong experience in using Agile Methodologies such as Kanban or Scrum to build quality software.
• Good communication skills.

As well as doing great work we have created an award-winning, fun and exciting workplace that people love to be, we are looking for people to join us who share our values and are:

• Open - Always up for new ideas and able to take and give feedback in a positive way.
• Driven - sets high goals, doesn’t give up, and make sacrifices to ensure that their job gets done on time and meets/exceeds expectations.
• Curious - Aware of new technologies and uses them to make new improvements in the Engineering ecosystem.
• Smart - Innovative and thinks out of the box, in difficult situations finds a way to succeed no matter what 
• Responsible - takes ownership of tasks given and has a strong work ethic.

About Peak

In an age when becoming AI and data-driven is one of the most important things businesses must do, it can also be one of the most challenging. That’s where Peak comes in; our CODI system sits at the heart of our client’s businesses, enabling the rapid unification, modelling and - most importantly - use of data - helping decision makers make great commercial decisions, powered by AI. All supported by our world-class data science team.

Founded in 2014, Peak has grown rapidly, in line with the world’s fastest growing SaaS companies, winning numerous awards and attracted significant funding to support the company’s ongoing investment in machine learning and AI technologies. All to further our mission to become the world’s leading AI System business.

Headquartered in Manchester, Peak also has offices in London, Edinburgh, Jaipur and Brisbane. Our clients include some of the world's leading retailers, manufacturers and well-known brands alongside highly innovative and tech-savvy businesses. Peak is an Amazon Web Services (AWS) Partner, and holds Machine Learning Competency and Retail Competency status.