Client Full-Stack Engineer — IM Chat Platform, Android Focus

Binance is a leading global blockchain ecosystem behind the world’s largest cryptocurrency exchange by trading volume and registered users. We are trusted by 300+ million people in 100+ countries for our industry-leading security, user fund transparency, trading engine speed, deep liquidity, and an unmatched portfolio of digital-asset products. Binance offerings range from trading and finance to education, research, payments, institutional services, Web3 features, and more. We leverage the power of digital assets and blockchain to build an inclusive financial ecosystem to advance the freedom of money and improve financial access for people around the world. Responsibilities

Design, develop, and maintain client-side applications for an instant messaging platform, with Android as the primary focus

Build core messaging features: real-time chat, group chat, media messaging, message sync, offline messaging, push notifications

Participate in client-side architecture design, ensuring consistent UX across Android, iOS, and Web

Use AI-powered tools (Cursor, GitHub Copilot, ChatGPT, Claude, etc.) to support cross-stack frontend development — read, debug, and modify iOS/Web codebases

Integrate RESTful APIs and WebSocket/MQTT/gRPC real-time communication protocols

Handle local storage, offline-first experience, message state management, and cross-platform sync logic

Optimize client performance: startup speed, memory, battery, network efficiency, UI responsiveness

Collaborate with backend teams on API design, integration, and production issue investigation

Senior level: mentor junior engineers, contribute to technical design decisions

Requirements

Bachelor's degree in Computer Science, Software Engineering, or a related discipline

Engineer: 1-3+ years of experience; Senior Engineer: 3-5+ years

Solid production experience in Android development (Kotlin and/or Java)

Good understanding of Android SDK, Jetpack components, asynchronous programming, and modern client-side architecture

Required: ability to use AI-powered development tools (Cursor, GitHub Copilot, ChatGPT, Claude, or similar) for cross-stack frontend development

Able to read, understand, debug, and make reasonable changes in iOS or Web codebases with AI tool support

Familiarity with WebSocket, MQTT, gRPC, or similar real-time communication protocols

Understanding of messaging concepts: message delivery, read status, sync, local persistence, offline support, push notifications

Good understanding of client-side performance optimization, memory management, multithreading, and security best practices

Familiar with Git, CI/CD pipelines, automated testing, and Agile processes

Strong debugging, problem-solving, ownership, and communication skills

Preferred Qualifications

Experience building IM products or communication platforms (WhatsApp, Telegram, WeChat, Discord, Slack, Messenger, etc.)

iOS development experience (Swift, SwiftUI, Objective-C)

Web frontend experience (TypeScript, React, Vue, Next.js)

Cross-platform client or mobile full-stack development experience

End-to-end encryption, message security, or cryptographic protocols experience

Voice/video calling or RTC technologies experience

Large-scale distributed messaging infrastructure experience

Fintech, payments, or Web3 applications experience

Open-source contributions or published apps on Google Play/App Store