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Senior Frontend Developer - React.js
Senior Frontend Developer - React.jsQUARKS TECHNOSOFT PRIVATE LIMITED • Gurugram
Senior Frontend Developer - React.js

Senior Frontend Developer - React.js

QUARKS TECHNOSOFT PRIVATE LIMITED • Gurugram
17 days ago
Job description

Description :

We are looking for a skilled and experienced Senior Frontend Developer to lead the development of our real-time messaging web application. Youll be responsible for building a high-performance, responsive, and secure web client that mirrors the mobile experience complete with messaging, notifications, media sharing, and end-to-end encryption.

Key Responsibilities :

1. Frontend Architecture & Development :

  • Design and implement a performant, modular, and scalable web app using React, TypeScript, Next.js, or other modern frameworks.
  • Build and maintain core messaging features : real-time chat, group messaging, media sharing, typing indicators, read receipts, and notifications.
  • Create reusable UI components and ensure consistent design across the platform.

2. Real-Time Communication :

  • Integrate WebSockets, WebRTC, or similar real-time communication protocols to support live chat and media sharing.
  • Ensure message syncing, delivery tracking, offline handling, and real-time UI updates.
  • 3. Security & Privacy :

  • Collaborate with backend / security teams to implement end-to-end encryption, secure session management, and authentication workflows.
  • Ensure secure data handling in the browser local storage, cookies, tokens, and message caching.
  • 4. Cross-Platform Optimization :

  • Optimize the app for performance, accessibility, and responsiveness across browsers and screen sizes.
  • Ensure smooth operation on Chrome, Firefox, Safari, and Edge.
  • 5. Testing & Quality Assurance :

  • Write unit, integration, and end-to-end tests using tools like Jest, Cypress, or Playwright.
  • Participate in code reviews, test automation, and bug triaging.
  • 6. Collaboration & Deployment :

  • Work with backend (Java / Erlang) and mobile teams (iOS / Android) to align feature development.
  • Integrate frontend with RESTful and WebSocket APIs.
  • Contribute to CI / CD pipelines, release management, and production monitoring.
  • Required Qualifications :

  • 6+ years of professional experience in web development, building production-grade applications.
  • Proficient in JavaScript / TypeScript and modern frontend frameworks (preferably React and Next).
  • Experience with real-time communication using WebSockets, Firebase, or similar technologies.
  • Strong understanding of HTML5, CSS3, Responsive Design, and Cross-Browser Compatibility.
  • Familiarity with REST APIs, WebSocket APIs, and frontend state management (Redux, Zustand, etc.).
  • Good grasp of security principles XSS, CSRF, CQRS, HTTPS, token handling, and secure storage.
  • Experience with performance profiling, lazy loading, code-splitting, and network optimization.
  • (ref : hirist.tech)

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