Senior Mobile Engineer (Card & Payment)

The role

You will own and improve the global card issuance process. You will work with product and engineering partners in the US and Asia to build mobile features using Swift, Kotlin, or Rust.

What you will do

• Own the end-to-end global card issuance process.
• Translate business, user, payment, and regulatory requirements into architecture and delivery plans.
• Own features from discovery through production with focus on security, reliability, and test coverage.
• Drive ambiguous, cross-functional initiatives to completion.
• Collaborate with product and engineering teams in the US and Asia.
• Build with Swift, Kotlin, or Rust.
• Use AI coding tools throughout the development lifecycle.
• Build and maintain reusable AI workflows and engineering harnesses.
• Review code, mentor teammates, and make decisions to improve engineering quality.
• Contribute to hiring, onboarding, and team practices.

Required qualifications

• B.S. or M.S. in Computer Science, or equivalent practical experience.
• Proven experience shipping and operating production-quality mobile applications, with deep expertise in iOS or Android.
• Strong proficiency in at least one of Swift, Kotlin, or Rust.
• Exceptional ownership and self-direction.
• Demonstrated, regular use of AI coding tools.
• Team-first mindset.
• Professional proficiency in English and Mandarin Chinese is required.

Nice to have

• Hands-on experience with global card issuance flows, card processing, payments, fintech, crypto, or other high-trust financial products.
• Experience launching products across multiple countries or regulatory environments.
• Knowledge of mobile security, payment authentication, risk controls, or transaction lifecycle design.
• Experience improving mobile architecture, shared components, developer tooling, or engineering productivity at team scale.
• Experience mentoring engineers or leading cross-functional technical initiatives.

Benefits

• Competitive total compensation package
• L&D programs and Education subsidy
• Various team building programs and company events
• Wellness and meal allowances
• Comprehensive healthcare schemes for employees and dependants

About the company

OKX is a leading crypto exchange and the developer of OKX Wallet. It is part of OKG, a group that brings the value of Blockchain to users around the world.