The Role
Own and build OKX's in-app messaging platform and multi-platform IM SDK. Implement real-time delivery (WebSocket/long connections), offline push (APNs/FCM/China vendors), optimize mobile performance, platformize the IM engine, build user-to-agent AI chat, and drive architecture, code quality, and cross-team technical direction at senior/staff level.
Summary Generated by Built In
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.
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 TeamWhat We Look For In YouNice-To-Haves
Own OKX's in-app messaging end to end — from a fully in-house IM engine to a messaging platform powering community chat, payments, VIP service, and user-to-agent (AI) chat for millions. The more senior you are, the more you set the technical direction others build on.
- Build our multi-platform unified IM SDK — unify the logic core across platforms and push performance and stability as a lever for growth.
- Platformize the engine — turn it into a platform that product teams build business scenarios on (community chat, payments, VIP service).
- Build user-to-agent (AI) chat — the conversational AI surface on top of IM, from real-time delivery to the agent interaction experience.
- Own delivery end-to-end — real-time WebSocket long-connection and offline push across overseas + China vendor channels — so messages reach users whether the app is open or not.
- Push latency, reliability, and battery/memory to their limits under real production and weak-network conditions.
- Build our AI-native engineering practice — design automated development workflows and harness systems (agents, evals, guardrails, CI integration) that let AI do real engineering work, while safeguarding delivery quality and efficiency.
- Raise the bar through design and code review, and by making the engineers around you better.
- At the Staff level: set technical direction beyond your own area and drive cross-team decisions that shape the IM platform.
- Deep, hands-on experience building native iOS and/or Android — you understand the platform, not just a framework on top of it.
- Experience with a cross-platform / shared business-logic layer. We build ours in Rust + UniFFI; direct Rust-on-mobile experience is a strong plus, but experience with any shared-logic approach — KMP, Flutter, or React Native — transfers well and is valued.
- Fluent in at least one of: Swift / Kotlin / Rust / Objective-C / Java / JavaScript, with strong CS fundamentals.
- Architecture experience with large-scale mobile apps — you've applied maintainable design patterns and own solutions from requirements through to production.
- Depth in at least one layer of the messaging stack, and the ability to work across both — whether your strength is chat/feature-level UX or real-time / networking internals: WebSocket / long-connection, and/or offline push delivery across overseas + China channels (APNs, FCM, and China vendor push). Bonus if you have the depth to reason about a messaging engine from the ground up, not just consume one.
- Strong mobile performance chops (memory, battery, concurrency, weak-network).
- You apply AI deeply in your own engineering — not just code generation. You've built, or are driven to build, automated development workflows and harnesses that make delivery both faster and more reliable. Solid grasp of LLM fundamentals, prompt engineering, RAG, and agent concepts, with hands-on experience taking an AI pipeline from scratch to shipped — and you're excited to build user-facing conversational / agent-chat experiences too.
- Comfortable with ambiguity and high scale — you've debugged problems that only appear under real production load.
- Signals we value: you naturally raise the standard of teams you join, mentor without being asked, and can grow into a technical anchor for the group.
- Built or maintained an IM / chat product, or an SDK consumed by other teams.
- Experience with mini-program or dynamic/hot-update frameworks.
- Crypto trading / Web3 experience.
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!
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.
Skills Required
- Deep, hands-on experience building native iOS and/or Android
- Experience with a cross-platform/shared business-logic layer (Rust + UniFFI, KMP, Flutter, or React Native)
- Fluent in at least one: Swift, Kotlin, Rust, Objective-C, Java, or JavaScript
- Architecture experience with large-scale mobile apps and maintainable design patterns
- Depth in messaging stack and ability to work across both chat UX and real-time networking internals (WebSocket/long-connection)
- Experience with offline push delivery across APNs, FCM, and China vendor push channels
- Strong mobile performance skills (memory, battery, concurrency, weak-network conditions)
- Practical experience applying AI in engineering: LLM fundamentals, prompt engineering, RAG, agent concepts, and shipping AI pipelines
- Proven ability to deliver end-to-end features at scale and debug production-only issues
- Mentorship, raising engineering standards, and driving cross-team technical decisions (Staff level)
- Current right to work in Hong Kong / do not require employer visa sponsorship (candidate prioritization)
- Direct Rust-on-mobile experience (strong plus)
- Built or maintained an IM/chat product or an SDK consumed by other teams
- Experience with mini-program or dynamic/hot-update frameworks
- Crypto trading / Web3 experience
OKX Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about OKX and has not been reviewed or approved by OKX.
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Fair & Transparent Compensation — Pay is considered competitive or above market, especially in engineering, product, and legal roles across major hubs. This positioning is consistently cited as a major attraction for candidates.
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Healthcare Strength — Role descriptions indicate comprehensive medical, dental, vision, life, and disability coverage, with employer-paid premiums in some cases. Health coverage is highlighted alongside core benefits like PTO and parental leave.
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Wellbeing & Lifestyle Benefits — Allowances for education and fitness, meal perks and snacks, team-building budgets, and structured learning programs are described across locations. These extras enhance the total rewards package beyond base pay.
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The Company
What We Do
Founded in 2017, OKX is one of the world’s leading cryptocurrency spot and derivatives exchanges. OKX innovatively adopted blockchain technology to reshape the financial ecosystem by offering some of the most diverse and sophisticated products, solutions, and trading tools on the market. Trusted by more than 20 million users in over 180 regions globally, OKX strives to provide an engaging platform that empowers every individual to explore the world of crypto. In addition to its world-class DeFi exchange, OKX serves its users with OKX Insights, a research arm that is at the cutting edge of the latest trends in the cryptocurrency industry. With its extensive range of crypto products and services, and unwavering commitment to innovation, OKX’s vision is a world of financial access backed by blockchain and the power of decentralized finance.
