Senior Mobile Trading Engineer - Crypto Fintech

Okx; San Jose (CA); On-site; USD 224,000 - 322,000; Full time

Benefits offered by this job

Competitive total compensation package

L&D programs and Education subsidy

Team events and wellness support

Healthcare schemes for employees and/’

Job summary

OKX is seeking a Mobile Engineer for the Trading team to design and build end-to-end mobile systems for iOS and Android, delivering scalable crypto trading experiences. You will work at the intersection of finance and technology, applying AI tools to accelerate development and improve quality.

The role requires strong Swift/Kotlin/React Native skills and prior production mobile code shipping in fintech or crypto contexts, with a focus on maintainability and cross-functional collaboration.

Qualifications

• Proven experience shipping production mobile code on iOS/Android.
• Strong proficiency in Swift, Kotlin, or React Native.
• Experience in fintech, crypto, or Web3 environments.
• Experience integrating AI tools to optimize workflows.
• Ongoing AI skill development and prompt engineering.
• 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 strategy.
• Understand and apply knowledge of crypto products, blockchain technologies, and market dynamics to deliver solutions at scale.
• Ship production-quality code with an emphasis on long-term maintainability, with relevant documentation and test coverage.
• Break down complex engineering projects into executable tasks and partner with applicable cross-functional teams.
• Independently identify stakeholders and align cross-functional partners toward project completion.
• Conduct code reviews and provide constructive feedback; action feedback from reviews of your own code promptly.
• Apply AI coding tools to accelerate development, improve code quality, and optimise engineering workflows.
• Serve as a subject matter expert within the mobile engineering team and provide consultation on domain-level projects.
• Build relationships with internal stakeholders; share project updates and influence decision-making through data-driven insights.
• Participate in interviewing and onboarding of new team members.

Skills

Swift

Kotlin

React Native

Fintech experience

AI workflow optimization

Prompt engineering

Communication

Education

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

Job description

OKX is seeking a Mobile Engineer for the Trading team to design and build end-to-end mobile systems for iOS and Android, delivering scalable crypto trading experiences. You will work at the intersection of finance and technology, applying AI tools to accelerate development and improve quality.

The role requires strong Swift/Kotlin/React Native skills and prior production mobile code shipping in fintech or crypto contexts, with a focus on maintainability and cross-functional collaboration.