Frontend Developer

Frontend Engineer

React, TypeScript & Production Web Applications

📍 Mumbai (On-site) | Full-time | 3-5 years

About the Role:

Unico Connect is an AI-first technology partner that builds custom mobile, web, and AI products for clients across multiple geographies.

We are hiring a Frontend Engineer who will build production-grade web applications across customer engagements, partnering closely with designers, backend engineers, and AI engineers.

The mandatory requirement for this role is hands-on production experience shipping React applications, with ownership of at least one feature area end to end including state, API integration, and testing.

The role is hands-on.

Expect to implement complex flows, integrate with backend and AI services, contribute to a shared design system, write tests, and review the work of others.

A typical week includes a design handoff review, implementation of a new flow, a code review session, and a working call with a backend engineer on API contracts.

Responsibilities:

Production UI Development

Build production-grade React UI for customer engagements, including complex forms, dashboards, data-dense views, and AI-driven interactions.

API Integration

Integrate with REST and GraphQL APIs.

Handle authentication, streaming responses (Server-Sent Events, WebSockets), retries, and graceful error states.

State Management

Build state architecture using Redux, Zustand, Jotai, or equivalent.

Handle async state, optimistic updates, and cross-component coordination.

Design System Contribution

Implement components within an established design system.

Maintain token discipline and contribute back to shared components.

Testing

Write unit, integration, and end-to-end tests using Jest, React Testing Library, and Playwright or Cypress.

Performance and Accessibility

Profile and optimise rendering and bundle size.

Apply WCAG 2.1 AA practices in everyday work.

AI-Assisted Development

Use Claude, Cursor, and similar tools day to day.

Build discipline for reviewing and validating AI-generated code.

Requirements:

Hands-on Production React Experience (Mandatory)

Must have personally shipped at least one feature area end to end in a production React application, owning state, API integration, and testing.

POCs and internal tools alone do not qualify.

3 to 5 Years of Professional Frontend Engineering Experience

Strong JavaScript, TypeScript, and React

Solid with hooks, context, and modern patterns.

Working comfort with Next.js (SSR, SSG, app router).

State Management

Production experience with Redux, Zustand, Jotai, or equivalent.

CSS and Styling

Strong with Tailwind, CSS Modules, or CSS-in-JS.

Comfortable building responsive layouts.

REST and GraphQL

Comfortable consuming both.

Working knowledge of streaming responses and async patterns.

Testing Fluency

Jest, React Testing Library, and at least one of Playwright or Cypress.

Git and CI/CD Basics

Comfortable with feature branching, pull requests, and CI-integrated test runs.

Strong Written and Spoken English Communication

Nice to Have:

• Experience with editor or canvas UIs
• Storybook
• Animation libraries (Framer Motion, GSAP)
• Exposure to AI-driven UI patterns
• Visual regression testing tools

• 3+ Years of total experience in JavaScript related technologies including ReactJS, JQuery, front end integration with CSS3 and HTML5 .
• experience in HTML5 , CSS3 , & Web application development
• Strong understanding of modern development methodologies and best industry standards
• Experience writing/completing Unit Testing
• Experience working with APIs & RESTful APIs
• Experience working in Agile3

• Fullstack technical expertise with 9+ years of experience in Angular 2+ Versions and NodeJS having led front-end development team.
• Work experience as Architect for 3 or more years. Able to set a tech road map for the entire product/project.
• Previous experience with systems integration projects
• Experienced in the usage and development of REST APIs
• Knowledge and experience in implementing commercial web applications
• Experienced with JavaScript (ECMAScript 6), HTML5, Semantic Markup and CSS 3
• Writing testable object-oriented software using best development practices
• Designing, building, and maintaining developer-friendly HTTP-based APIs
• Agile methodologies and practices (including Scrum, Kanban, Extreme Programming)
• Test-Driven Development or Behavior Driven Development
• Writing Clean Code & decoupled modules using the power of Design Patterns
• Pair Programming
• Experience in AWS
• Experienced in designing scalable solutions, writing efficient code, optimizing performance, and debugging issues.
• Good communication skills with the ability to present complex technical information in a clear and concise manner to technical teams.

• Responsible to develop web application using Angular 2 or above.
• To Create functional requirements and design documents for new features in web application.
• Write and maintain the front end code of web applications & To work in UI development.
• Must have developed web application.
• Hands on experience in Angular 2 or above , JavaScript, JQuery, HTML, HTML5, CSS, Bootstrap.
• Knowledge in jasmine or karma (optional)

•  Lead the design and implementation of our new web-based user interface for our partner management service
  •    Work effectively with product management, UX designers and backend engineers
  •    Commit to deliver high quality, robust, and accessible user interface
  •    Follow software development best practices including writing unit tests and perform code reviews
  •    Build reusable components and libraries and optimize for maximum performance
  •    Provide production deployment support and troubleshooting

What you need to be ready: 

•  Minimum 3+ years of experience in UI Development
•  Thorough understanding of React.js and its core principles with minimum 2 years of experience
•  Prior experience in building customer facing web Application
  •    In-depth knowledge of HTML, Typescript/JavaScript, CSS/Sass, and related frameworks and libraries
  •    Thorough understanding of React.js and its core principles with minimum 2 years of experience
  •    Experience in Single Page Application architecture
  •    Proficient in writing tests using Jest, Mocha or any similar framework
  •    Strong computer science fundamentals in design, data structures, and problem solving
  •    Excellent troubleshooting skills

React Native / React JS Developer

We're looking for a React Native Developer to join our growing frontend team. As a React Developer, you will help develop the next generation of our apps using tools such as React.js, Redux, Enzyme, and Webpack. You should be familiar with React and its ecosystem. 

Responsibilities

- Actively aid the consulting team in different phases of the project including problem definition, effort estimation, diagnosis, solution generation, design develop and deployment.,

- Contribute to unit-level and organizational initiatives.,

- Adherence to the organizational guidelines and processes

- Design, build and maintain efficient, reusable, and reliable codes by setting expectations and features priorities throughout the development life cycle

Requirement

- 2+ years' experience working with a Javascript framework, React Native, ReactJS, Typescript, Node JS

- In-depth understanding of Javascript, the DOM, and relevant concepts

- Must have experience in Web services, Web API, REST services, HTML, CSS3

- Proficiency with browser-based debugging and performance testing

- Identify bottlenecks and bugs, and recommend system solutions by comparing advantages and disadvantages of custom development.

- Contributing to team meetings, troubleshooting development, and production problems across multiple environments and operating platforms.

Frontend Developer - React JS/progressive Web App (2+ yrs experience)

Experienced in developing applications using Javascript, ReactJS, AngularJS, NodeJS, HTML5, CSS3/CSS4 and other UI technologies.
Experience in building rich PWA applications.
Understanding and experience with asynchronous processing, partial page refresh, DOM traversal and manipulation 
Deliver across the entire app life cycle - concept, design, built, deploy, test
In depth data structure and algorithm developement experience

Qualifications:

• Minimum one year of experience in React, Redux 
• Experience with Build systems e.g. Webpack/Grunt/Gulp 
• In-depth knowledge of HTML/XHTML/HTML5 
• Experience with Testing frameworks e.g. Karma/Jasmine/Protractor/Cucumber/Mocha/Jest 
• Experience with interface development toolkits: e.g. Less/SASS 
• Experience with web service integration protocols such as REST & GraphQL 
• In-depth knowledge of Javascript e.g. ES5/ES6/Typescript 
• Strong Knowledge of CSS 3 
• Must be a strong team player 
• Have a good understanding of design and user experience principles. 
• Experience in dealing with cross-browser compatibility requirements 
• Understanding of mobile development best practices (e.g. responsive design, graceful degradation, etc.) 
• Ability to work independently as well as on a team and learn from colleagues 
• Open-minded, flexible and willing to adapt to changing situations 
• Good designing & color combination skills 
• Experience with Git or other version control systems.