The Role
Design and own account-system subsystems for a high-scale crypto mobile platform: authentication, MFA/Passkey, sessions, device trust, registration and recovery. Build secure, low-friction flows at millions DAU, partner with risk/security, and lead AI-native engineering practices (automated workflows, agents, evals). Mentor engineers, raise technical standards, and set cross-team technical direction at Staff level.
Summary Generated by Built In
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.
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 Team What We Look For In YouNice-To-Haves
Own the account backbone of a CeFi platform trusted by millions — login, registration, account security, MFA, Passkey — where a single security regression is measured in real user funds. The more senior you are, the more you set the technical direction others build on.
What You'll Be Doing
- Own account-system subsystems end-to-end — authentication, MFA, Passkey/WebAuthn, session & device trust, account registration and recovery — including architecture, tradeoffs, and long-term evolution.
- Design flows that are secure and low-friction at millions-of-DAU scale — the hardest tradeoff in this space.
- Partner with risk & security teams to turn threat models into shipped mobile defenses.
- Build our AI-native engineering practice — design automated development workflows and harness systems (agents, evals, guardrails, CI integration) that let AI do real engineering work, while safeguarding delivery quality and efficiency.
- Raise the bar through design and code review, and by making the engineers around you better.
- At the Staff level: set technical direction beyond your own subsystem and drive cross-team, cross-timezone decisions that shape the account platform.
- Deep, hands-on experience building native iOS and/or Android — you understand the platform, not just a framework on top of it.
- Experience with a cross-platform / shared business-logic layer. We build ours in Rust + UniFFI; direct Rust-on-mobile experience is a strong plus, but experience with any shared-logic approach — KMP, Flutter, or React Native — transfers well and is valued.
- Fluent in at least one of: Swift / Kotlin / Rust / Objective-C / Java / JavaScript, with strong CS fundamentals.
- Architecture experience with large-scale mobile apps — you've applied maintainable design patterns and own solutions from requirements through to production.
- Hands-on with mobile authentication & security — OAuth/OIDC, MFA, secure storage (Keychain/Keystore), biometrics. Direct experience with Passkey / WebAuthn / FIDO2 is a strong advantage — it's live in our stack and central to what you'll work on.
- Solid grasp of threat modeling and the mobile attack surface.
- You apply AI deeply in your own engineering — not just code generation. You've built, or are driven to build, automated development workflows and harnesses that make delivery both faster and more reliable. Solid grasp of LLM fundamentals, prompt engineering, RAG, and agent concepts, with hands-on experience taking an AI pipeline from scratch to shipped.
- Comfortable with ambiguity and high scale — you've debugged problems that only appear under real production load.
- Signals we value: you naturally raise the standard of teams you join, mentor without being asked, and can grow into a technical anchor for the group.
- Fraud / risk, cryptography, or regulated-industry (fintech) experience.
- Experience with mini-program or dynamic/hot-update frameworks.
- Crypto trading / Web3 experience.
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!
Please note that Hong Kong is a group-level service hub, and OKX does not carry on a business of operating a virtual asset trading platform in Hong Kong.
Notice:
All official OKX vacancies are published on this website. While roles may appear on selected third-party platforms from time to time, information on other sites may be inaccurate or outdated. If in doubt, please apply directly through our official careers website.
Information collected and processed as part of the recruitment process of any job application you choose to submit is subject to OKX's Candidate Privacy Notice.
Skills Required
- Deep hands-on experience building native iOS and/or Android applications
- Experience with cross-platform/shared business-logic layers (Rust + UniFFI, KMP, Flutter, React Native)
- Direct Rust-on-mobile experience
- Fluent in at least one: Swift, Kotlin, Rust, Objective-C, Java, or JavaScript
- Architecture experience with large-scale mobile apps (maintainable design patterns to production)
- Hands-on experience with mobile authentication and security: OAuth/OIDC, MFA, secure storage (Keychain/Keystore), biometrics
- Direct experience with Passkey / WebAuthn / FIDO2
- Solid grasp of threat modeling and the mobile attack surface
- Practical experience building AI-native engineering workflows: LLM fundamentals, prompt engineering, RAG, agent concepts, CI integration
- Proven ability to debug high-scale production issues and operate under ambiguity
- Demonstrated leadership: mentor peers, raise engineering standards, and set technical direction
- Fraud/risk, cryptography, or regulated-industry (fintech) experience
- Experience with mini-program or dynamic/hot-update frameworks
- Crypto trading or Web3 experience
OKX Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about OKX and has not been reviewed or approved by OKX.
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Fair & Transparent Compensation — Pay is considered competitive or above market, especially in engineering, product, and legal roles across major hubs. This positioning is consistently cited as a major attraction for candidates.
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Healthcare Strength — Role descriptions indicate comprehensive medical, dental, vision, life, and disability coverage, with employer-paid premiums in some cases. Health coverage is highlighted alongside core benefits like PTO and parental leave.
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Wellbeing & Lifestyle Benefits — Allowances for education and fitness, meal perks and snacks, team-building budgets, and structured learning programs are described across locations. These extras enhance the total rewards package beyond base pay.
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The Company
What We Do
Founded in 2017, OKX is one of the world’s leading cryptocurrency spot and derivatives exchanges. OKX innovatively adopted blockchain technology to reshape the financial ecosystem by offering some of the most diverse and sophisticated products, solutions, and trading tools on the market. Trusted by more than 20 million users in over 180 regions globally, OKX strives to provide an engaging platform that empowers every individual to explore the world of crypto. In addition to its world-class DeFi exchange, OKX serves its users with OKX Insights, a research arm that is at the cutting edge of the latest trends in the cryptocurrency industry. With its extensive range of crypto products and services, and unwavering commitment to innovation, OKX’s vision is a world of financial access backed by blockchain and the power of decentralized finance.
