Software Engineer, Mobile, Web3

P2P; Hong Kong; On-site; HKD 500,000 - 800,000; Full time

Benefits offered by this job

Competitive total compensation package

L&D programs and education subsidy

Wellness and meal allowances

Comprehensive healthcare schemes

Job summary

OKX is seeking a Mobile Software Engineer who will build and maintain our core apps for iOS and Android, serving millions of users. This role involves developing features, optimizing performance, and collaborating across teams and functions.

The ideal candidate is experienced in either native development or cross-platform solutions and is passionate about mobile technology and blockchain fundamentals. Join us to empower users interacting with digital assets.

Qualifications

• Experience in native iOS/Android development or cross-platform solutions.
• Fluent with Java, Objective-C, Swift, Kotlin, or JavaScript.
• Understanding of data structures and algorithms.

Responsibilities

• Develop new features for iOS and Android apps.
• Optimize performance and enhance customer satisfaction.
• Evaluate new solutions for business needs.
• Collaborate with design and product teams.
• Maintain high-quality technical documentation.

Skills

Native iOS/Android development

Cross-platform solutions (ReactNative/Flutter/Lua)

Java

Objective-C

Swift

Kotlin

JavaScript

Data structures and algorithms

Agile development (TDD, CI, Scrum)

Job description

OKX will be prioritising applicants who have a current right to work in Hong Kong, and do not require OKX's sponsorship of a visa.

Who We Are

At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom.

OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves.

Across our multiple offices globally, we are united by our core principles: We Before Me, Do the Right Thing, and Get Things Done. These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er.

OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more.

About The Opportunity

As a mobile software engineer, you will build and maintain a core OKX app with millions of daily active users. You will work cross-functionally with design, product and other engineering teams to identify customer needs, and ship high-quality new features through fast iterations. This is an opportunity to learn the full life cycle of crypto mobile applications including pro/retail trading, asset management and wallet. Join us in building the next generation of mobile-first Web3 experiences, empowering millions of users to seamlessly interact with digital assets, decentralized applications, and blockchain-powered services through secure and intuitive products.

What You’ll Be Doing

• Part of a global mobile team, developing new features for the all-in-one iOS and Android apps.
• Strive for performance optimization and maximize customer satisfaction.
• Stay on top of industry trends, and evaluate new solutions to address our unique and fast-growing business needs.
• Work closely with design and product teams, and turn design ideas into quality features that scale to millions of users.
• Collaborate with global development teams, and deliver customized solutions targeting international users while maintaining consistency with the overall architecture.
• Maintain high-quality technical documentation and improve efficiency in cross-office / timezone cooperation.

What We Look For In You

• Experience in either native iOS/Android development, or cross-platform solutions like ReactNative/Flutter/Lua.
• Builds AI-leveraged engineering workflows, curating domain knowledge bases, harnessing context, and codifying repeatable agent skills/workflows, so AI tools like Claude Code / Codex deliver reliably on real production work.
• Fluent with at least one of the following languages: Java, Objective-C, Swift, Kotlin, JavaScript.
• Understanding of common data structures and algorithms.
• Embrace agile development process including TDD, CI and Scrum.
• Passionate about mobile technology and building applications for a large user base.

Nice-To-Haves

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

Perks & Benefits

• Competitive total compensation package
• L&D programs and education subsidy for employees' growth and development
• Various team building programs and company events
• Wellness and meal allowances
• Comprehensive healthcare schemes for employees and dependants
• More that we love to tell you along the process!

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