Mobile Engineer, Fintech & Web3 Trading

OKX; San Jose, Northern (CA, KY); Hybrid; USD 134,000 - 201,000; Full time

Benefits offered by this job

L&D programs

Education subsidy

Team building programs

Wellness and meal allowances

Comprehensive healthcare schemes

Job summary

OKX is hiring a Mobile Engineer on the Trading team to design and build end‑to‑end mobile experiences for millions of users. You will work across iOS and Android, applying crypto and Web3 knowledge to deliver scalable features with maintainable code and solid test coverage.

You will collaborate with product, design, and business teams, leverage AI tools to accelerate development, and mentor colleagues while advancing the crypto ecosystem.

Qualifications

• Proven experience shipping production‑quality mobile code on iOS and/or Android.
• Strong proficiency in Swift, Kotlin, or React Native.
• Experience in fintech, crypto, or Web3 environments.
• Ability to integrate AI tools to optimize workflows and drive impact.
• Ongoing AI skill development and staying current with technologies.
• Ability to communicate technical concepts to non‑technical audiences.

Responsibilities

• Design and build end‑to‑end mobile systems across iOS and Android, from architecture to launch.
• Understand crypto products and blockchain tech to deliver scalable solutions.
• Ship production‑quality code with documentation and test coverage.
• Break down complex projects and coordinate with cross‑functional teams.
• Identify stakeholders and align partners toward project completion.
• Conduct code reviews and act on feedback promptly.
• Apply AI coding tools to accelerate development and improve quality.
• Serve as a subject matter expert within the mobile team.
• Build relationships with internal stakeholders and share updates with data‑driven insights.
• Participate in interviewing and onboarding of new team members.

Skills

Mobile development

Swift

Kotlin

React Native

Fintech / Crypto

AI tools

Prompt engineering

Technical communication

Education

B.S. or M.S. in Computer Science or equivalent

Job description

OKX is hiring a Mobile Engineer on the Trading team to design and build end‑to‑end mobile experiences for millions of users. You will work across iOS and Android, applying crypto and Web3 knowledge to deliver scalable features with maintainable code and solid test coverage.

You will collaborate with product, design, and business teams, leverage AI tools to accelerate development, and mentor colleagues while advancing the crypto ecosystem.