2 months ago
Hong Kong, Hong KongSenior / Staff+
Responsibilities
- Own authentication, MFA, Passkey/WebAuthn, session and device trust, registration, and account recovery subsystems from requirements through production.
- Design secure, low-friction mobile account flows for millions of daily active users.
- Define architecture, technical tradeoffs, and long-term evolution for account systems.
- Partner with risk and security teams to translate threat models into shipped mobile defenses.
- Build automated AI-native development workflows and harnesses involving agents, evaluations, guardrails, and CI integration.
- Conduct design and code reviews, mentor engineers, and raise team engineering standards.
- At Staff level, set technical direction across the account platform and drive cross-team, cross-time-zone decisions.
Requirements
- Deep hands-on experience building native iOS and/or Android applications.
- Experience with a cross-platform or shared business-logic layer; Rust and UniFFI experience is a strong plus, while KMP, Flutter, and React Native experience is valued.
- Fluency in at least one of Swift, Kotlin, Rust, Objective-C, Java, or JavaScript, along with strong computer science fundamentals.
- Experience architecting large-scale mobile applications and owning solutions from requirements through production.
- Hands-on experience with mobile authentication and security, including OAuth/OIDC, MFA, secure storage, and biometrics.
- Passkey, WebAuthn, or FIDO2 experience is a strong advantage.
- Understanding of threat modeling and the mobile attack surface.
- Hands-on experience applying AI engineering workflows, including LLM fundamentals, prompt engineering, RAG, agents, and taking an AI pipeline from concept to production.
- Ability to debug issues under real production load and work effectively with ambiguity and high scale.
- Demonstrated mentoring, team leadership, and ability to grow into a technical anchor.
- Experience with fraud or risk, cryptography, regulated industries, mini-programs, dynamic or hot-update frameworks, crypto trading, or Web3 is a plus.
Benefits
- Competitive total compensation package.
- Learning and development programs and an education subsidy.
- Team-building programs and company events.
- Wellness and meal allowances.
- Comprehensive healthcare schemes for employees and dependants.
- Applicants are prioritised if they have current Hong Kong work rights and do not require visa sponsorship.
Tech Stack
Categories
Mobile
About OKX
OKX builds a global cryptocurrency exchange and Web3 wallet used by retail and institutional traders for spot, derivatives, and DeFi access, with developer APIs. Its business model centers on trading and financing fees, plus wallet and on-chain services. Founded in 2017 and privately held, OKX publishes monthly proof-of-reserves and operates as part of the OKG group serving crypto markets worldwide.