About this role

▸about OKX — company background

OKX will be prioritising applicants who have a current right to work in Hong Kong, and do not require OKX's sponsorship of a visa. Please note that Hong Kong is a group-level service hub, and OKX does not carry on a business of operating a virtual asset trading platform in Hong Kong.

Who We Are

At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom.

OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves.

Across our multiple offices globally, we are united by our core principles: We Before Me, Do the Right Thing, and Get Things Done. These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er.

OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more.

About The Opportunity

We are looking for a Staff Mobile Engineer to join our P2P & Fiat team, where you will own the mobile engineering for OKX's crypto fiat on/off-ramp experience across offshore and international markets. This is a high-ownership role at the intersection of mobile engineering and cross-border payments — you will build and scale the end-to-end fiat-to-crypto conversion journeys that serve users across Southeast Asia, LATAM, MENA, and beyond.

You bring hands-on experience building crypto on/off-ramp products, deep familiarity with cross-regional fiat payment integrations, and the technical discipline to own complex, multi-step transaction flows in a consumer-facing mobile product. You are also fluent in AI-assisted development and bring the rigour to build, maintain, and continuously improve your own AI engineering workflows.

What You'll Be Doing

Own the mobile engineering for the crypto fiat on/off-ramp experience — including quote flows, payment method selection, transaction status, and failure handling end-to-end.

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 are compliant with offshore crypto market requirements — including KYC tiers, transaction limits, and regional regulatory constraints.

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