Senior Frontend Developer
1 week ago
About the RoleWe 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 Responsibilities1. Frontend Architecture & DevelopmentDesign 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 CommunicationIntegrate 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 & PrivacyCollaborate 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 OptimizationOptimize the app for performance, accessibility, and responsiveness across browsers and screen sizes.Ensure smooth operation on Chrome, Firefox, Safari, and Edge.5. Testing & Quality AssuranceWrite 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 & DeploymentWork 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 Qualifications6+ 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 QualificationsPrior 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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