Mobile Software Engineer (Web3)

Location: Hong Kong (Applicants must have the current right to work in Hong Kong; no visa sponsorship is provided)

Company

OKX is a leading crypto exchange and the developer of OKX Wallet, providing millions of users and institutions access to crypto trading and decentralized applications.

What you will do

• Develop new features for all-in-one iOS and Android applications as part of a global team.
• Optimize app performance to maximize customer satisfaction for millions of daily active users.
• Collaborate with design and product teams to translate ideas into scalable, high-quality features.
• Deliver customized solutions for international users while maintaining architectural consistency.
• Maintain high-quality technical documentation to improve cross-timezone cooperation.

Requirements

• Experience in native iOS/Android development or cross-platform solutions like ReactNative, Flutter, or Lua.
• Proficiency in at least one of: Java, Objective-C, Swift, Kotlin, or JavaScript.
• Ability to build AI-leveraged engineering workflows using tools like Claude Code or Codex.
• Strong understanding of common data structures and algorithms.
• Experience with agile development processes, including TDD, CI, and Scrum.
• Must possess a current right to work in Hong Kong without requiring sponsorship.

Nice to have

• Strong understanding of blockchain fundamentals, including wallets, smart contracts, and tokens (ERC-20, ERC-721, ERC-1155).
• Experience building production-grade Web3, DeFi, NFT, or GameFi applications.

Culture & Benefits

• Competitive total compensation package.
• L&D programs and education subsidies for professional growth.
• Comprehensive healthcare schemes for employees and their dependents.
• Wellness and meal allowances.
• Diverse team building programs and company events.