Principal/Senior Software Engineer, Mobile, CEX

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 Team The CEX Trading Mobile Team sits at the heart of OKX's flagship exchange product, owning the trading experience for millions of users worldwide. We build and scale the real-time market data infrastructure that powers the OKX App — from live quotes and K-line charting to the full suite of trading scenarios that traders rely on every day. As a team, we care deeply about engineering quality: we hold high standards for technical architecture, move fast without cutting corners on stability or performance, and invest consistently in growing our craft through knowledge-sharing and technical training. We're now at an exciting inflection point, actively integrating AI into our product and engineering workflows — exploring how large language models, on-device inference, and intelligent agents can reshape the trading experience. If you're energized by solving hard technical problems at scale, working in a fast-moving market that never sleeps, and driving real innovation in one of the world's leading crypto platforms, this is the team to be on. What You'll Be Doing • Owning the technical design and delivery of trading market data features for the OKX App — including real-time quotes, K-line charts, and related scenarios: Leading the team through product development, optimization, and ongoing maintenance. • Participate in product requirement discussions, define well-reasoned technical solutions, and safeguard product performance, stability, and user experience. • Stay deeply informed on industry trends, continuously refine the technical architecture, and drive the growth of the team's engineering capabilities. • Organize and take part in technical training and knowledge-sharing sessions to elevate the team's overall technical proficiency. • Coordinate cross-functional resources to keep projects on track and on quality, ensuring smooth, high-quality feature launches. • Continuously improve the user experience, performance, and architecture of the modules under your ownership. • Lead the team in exploring the integration of AI into business scenarios, driving product and technology innovation. What We Look For In You • Hands-on AI engineering/pipeline development experience — Solid understanding of LLM fundamentals, Prompt Engineering, RAG, and core Agent concepts; proven practical experience delivering AI engineering solutions, including building complete AI workflows/pipelines from the ground up. • Track record of leading mid-to-large-scale projects end-to-end — High standards for technical architecture and engineering quality. • Trading business background — Client-side development experience at a crypto exchange, brokerage, or fintech app; familiarity with core domains such as order matching, market data display, and asset management. Nice-To-Haves • Native iOS or Android development background — Solid mobile engineering foundation with knowledge of mainstream platform architecture, performance optimization, and release processes. • Client-side team management experience — Has led a client-side team of 5 or more; capable of mentoring, cross-team collaboration, and technical review. • On-device AI or cross-platform experience — involve on-device AI inference, multimodal client features, or cross-platform architecture with Flutter / React Native. 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.