Staff / Senior Staff Software Engineer, Mobile

As a Staff or Senior Staff Software Engineer, Mobile at OKX, you own the mobile engineering for peer-to-peer trading and fiat payment experiences across multiple markets. You join the P2P & Fiat team and work at the intersection of mobile engineering and cross-border payments, collaborating closely with compliance, legal, and regional business teams to build localised, regulation-aware payment flows for users across Southeast Asia, LATAM, MENA, and beyond.

What you'll do

• Own the mobile engineering for P2P trading flows, including trading channel mechanics, payment methods, and end-to-end buy and sell transaction journeys.
• Build and maintain cross-regional fiat payment integrations, including local bank transfers, e-wallets, and third-party PSP integrations across markets such as Southeast Asia, LATAM, and MENA.
• Ensure mobile payment flows and user data handling comply with local and international regulatory requirements, including KYC tiers, transaction limits, and regional compliance constraints.
• Collaborate closely with compliance, legal, product, and regional market teams to translate local regulatory requirements into reliable, user-friendly mobile experiences.
• Drive technical decision-making on payment architecture, clearly articulating trade-offs across delivery speed, maintainability, and compliance.
• Apply AI coding tools actively in your workflow to build and maintain repeatable personal AI development workflows, not only for code generation.
• Mentor engineers on the team and contribute to a culture of ownership, technical rigour, and high engineering standards.

What you bring

• 5+ years of professional software engineering experience, including hands-on experience building and maintaining production mobile applications.
• Proficiency in either iOS development using Swift or Objective-C, or Android development using Kotlin or Java.
• Solid software engineering fundamentals, including data structures, algorithms, API design, testing, debugging, and system design.
• Experience delivering reliable mobile features and addressing practical challenges in areas such as performance, stability, architecture, or user experience.
• Ability to take ownership of engineering work, collaborate effectively with others, and drive solutions from design through production.
• Good judgment when balancing delivery speed, product requirements, technical quality, and maintainability.

Nice to have

• Experience in crypto, fintech, digital payments, or another regulated product environment.
• Experience building large-scale or multi-market consumer mobile applications.
• Experience in one or more areas such as mobile architecture, infrastructure, performance, security, or cross-platform development.
• Practical experience using AI-assisted development tools and validating AI-generated output.

What we offer

• Competitive total compensation package
• Learning and development programs and education subsidy for your growth and development
• Various team building programs and company events
• Wellness and meal allowances
• Comprehensive healthcare schemes for employees and dependants

About OKX

OKX is a leading crypto exchange and developer of OKX Wallet, giving millions access to crypto trading and decentralised crypto applications. OKX is also trusted by hundreds of large institutions seeking access to crypto markets. Part of OKG, the group brings the value of blockchain to users globally through its products OKX, OKX Wallet, OKLink, and more.

OKX prioritises applicants who have a current right to work in Hong Kong and do not require visa sponsorship. Please note that Hong Kong is a group-level service hub, and OKX does not operate a virtual asset trading platform in Hong Kong.