Senior Frontend Developer

6 days ago

Gurugram, India Hawk MarTech Full time

About the Role We are looking for a skilled and experienced Senior Frontend Developer to lead the development of our real-time messaging web application. You’ll 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. You’ll work closely with the product, design, backend, and mobile teams to deliver a world-class communication experience that works across devices and platforms. 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. Preferred Qualifications - Prior experience in messaging platforms, chat applications, or collaboration tools. - Familiarity with end-to-end encryption, cryptography libraries (e.g., libsodium, OpenPGP.js). - Experience with Service Workers, IndexedDB, or Progressive Web Apps (PWA). - Exposure to WebRTC, media streaming, or video/audio calling libraries. - Contributions to open-source projects or strong personal GitHub portfolio. - Experience working in agile teams with tools like Jira, Figma, and Git.

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