Senior Staff Software Engineer, Mobile P2P & Fiat

OKX · Hong Kong, Hong Kong SAR

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.

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 Senior Staff Mobile Engineer to join our P2P & Fiat team, where you will own the mobile engineering for OKX's peer-to-peer trading and fiat payment experiences across multiple markets. This is a high-ownership role sitting at the intersection of mobile engineering and cross-border payments — you will work closely with compliance, legal, and regional business teams to build localised, regulation-aware payment flows for users across Southeast Asia, LATAM, MENA, and beyond.

You bring deep familiarity with P2P trading mechanics, cross-regional fiat payment integrations, and the compliance considerations that govern them. You are also fluent in AI-assisted development and bring the discipline to build, maintain, and continuously improve your own AI engineering workflows.

What You'll Be Doing

Own the mobile engineering for P2P trading flows — including trading channel mechanics, payment methods, and buy/sell transaction journeys 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 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, articulating trade-offs clearly across speed, maintainability, and compliance.
Apply AI coding tools actively in your workflow — not just for code generation, but to build and maintain repeatable personal AI development workflows.
Mentor engineers on the team and contribute to a culture of ownership, technical rigour, and high engineering standards.

What We Look For In You

8+ years of software engineering experience with a track record of shipping production-quality mobile systems at scale.
Strong familiarity with P2P trading channels, payment methods, and buy/sell transaction flows in a consumer-facing mobile context.
Hands-on experience with cross-regional fiat payment integrations — local bank transfers, e-wallets, and third-party PSPs across markets such as Southeast Asia, LATAM, or MENA.
Working knowledge of fiat channel compliance — KYC tiers, transaction limits, and regional regulatory constraints.
Proficient in AI-assisted development — able to independently build and maintain personal AI engineering workflows, not just use AI tools ad hoc.
Strong cross-functional communication — comfortable working with compliance, legal, product, and regional market teams to align on requirements and hold the line on engineering quality.
Able to balance speed, quality, and compliance in a fast-paced, high-trust environment.

Nice-To-Haves

Mobile development experience in iOS (Swift/Objective-C) or Android (Kotlin/Java).
Experience integrating with specific PSPs or payment rails commonly used in Southeast Asia, LATAM, or MENA markets.
Background in fintech, crypto, or regulated consumer financial products.
Familiarity with anti-fraud mechanisms in P2P or fiat payment contexts.
Experience operating across multiple regulatory environments simultaneously.

Perks & Benefits

Competitive total compensation package
L&D programs and Education subsidy for employees' growth and development
Various team building programs and company events
Wellness and meal allowances
Comprehensive healthcare schemes for employees and dependants
More that we love to tell you along the process!

#LI-ML1 #LI-ONSITE

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.

Notice:

All official OKX vacancies are published on this website. While roles may appear on selected third-party platforms from time to time, information on other sites may be inaccurate or outdated. If in doubt, please apply directly through our official careers website.

Information collected and processed as part of the recruitment process of any job application you choose to submit is subject to OKX's Candidate Privacy Notice.

Mobile pay context

Based on 126 disclosed Mobile salaries on RoleSuite, the role pays a median of $193K/year, with most offers between $173K and $223K (10th–90th percentile: $149K–$254K).

See the full Mobile salary breakdown →

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