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React.js Developer - Redux/Javascript
React.js Developer - Redux/JavascriptISPG Technologies India Private Limited • Kolkata
React.js Developer - Redux / Javascript

React.js Developer - Redux / Javascript

ISPG Technologies India Private Limited • Kolkata
30+ days ago
Job description

Description :

We are seeking a skilled React.js Front-End Developer with over 5 years of hands-on experience to join a cutting-edge banking technology team.

This role is best suited for developers confident with modern front-end stacks and comfortable working independently in a hybrid Agile environment.

The role focuses on building scalable, responsive user interfaces using React (with Hooks), ES6+ JavaScript, and RESTful APIs, with an emphasis on performance and maintainability.

Key Responsibilities :

  • Build responsive and reusable UI components using React.js
  • Integrate frontend logic with REST APIs
  • Collaborate with backend, design, and QA teams in Agile sprints
  • Maintain high performance and cross-browser compatibility
  • Participate in code reviews, estimations, and daily standups
  • Migrate class-based components to functional with Hooks when needed

Must-Have Technical Skills Required Depth :

React.js (Hooks) :

  • Strong command of React Hooks such as useState, useEffect, and useContext for managing state, lifecycle, and side effects in functional components.
  • Able to differentiate class vs. functional patterns, migrate legacy codebases, and explain the Virtual DOM vs. Real DOM.

    • JavaScript (ES6+) :

  • Deep familiarity with closures, hoisting, async / await, Promises, destructuring, arrow functions, and handling asynchronous API logic.
  • Comfortable debugging JS behavior, explaining runtime output, and writing modular, reusable logic.

    • Redux (Relaxed Depth) :

  • Experience managing global state using Redux or Context API.
  • Able to configure basic reducers / actions, use useSelector / useDispatch, and understand unidirectional data flow. Middleware experience (Thunk / Saga) is a plus but not mandatory.

    • HTML5 / CSS3 :

  • Proficient in writing semantic, accessible HTML5. Capable of building responsive layouts using Flexbox, Grid, and media queries.
  • Strong understanding of the CSS box model and positioning schemes (relative, absolute, fixed, sticky).

    • API Integration :

  • Skilled in making fetch or axios calls to REST APIs, managing loading states, and handling success / error scenarios.
  • Able to decouple UI logic from data-fetching logic for maintainable code.

    • Agile Collaboration :

  • Experience working in Agile environments.
  • Comfortable participating in standups, effort estimations, and collaborating using Git and task boards (e.g., JIRA). Strong verbal and written communication skills.

    • Nice-to-Have Skills :

  • Basic testing using Jest or React Testing Library
  • Familiarity with React performance optimizations (useMemo, useCallback)
  • Knowledge of React Router for SPA navigation
  • Experience with CSS Frameworks like Bootstrap, SCSS
  • Understanding of Git, branching, and CI / CD pipelines

    • (ref : hirist.tech)

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