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Okx📍 Remote | $178k - $268k | |||
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ISO 9001 Certified | 400+ students | Learn more | by Metana | ||
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Inmobi📍 Remote | $84k - $90k | |||
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Client Full-Stack Engineer — IM Chat Platform, Android Focus
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
What does a React developer in web3 do?
A React developer in the context of web3 is a developer who is using the React JavaScript library to build user interfaces for decentralized applications (dApps) that run on the Ethereum blockchain
These dApps often use smart contracts to facilitate transactions and other interactions on the Ethereum network
Overall, the role of a React developer in web3 involves using your skills in React development to help build cutting-edge decentralized applications that leverage the power of the Ethereum blockchain
As a React developer in web3, some of your responsibilities might include:
- Integrating the dApp with the Ethereum blockchain. This might involve using tools like web3.js and Ethers.js to connect to the Ethereum network and interact with smart contracts.
- Building the user interface for a dApp using React. This could involve creating components for the various elements of the dApp, such as buttons, forms, and other input elements.
- Implementing features that are specific to decentralized applications, such as handling cryptocurrency transactions and displaying data from the blockchain in a user-friendly way.
- Collaborating with other members of the development team, such as blockchain engineers and designers, to ensure that the dApp functions properly and meets the needs of the end users.