Machine Learning Engineer — Risk & AI

<div data-page-id="XXUqdS7ngoHvyXxEAHrlisvDgxg" data-lark-html-role="root" data-docx-has-block-data="false"> <h2 class="heading-2 ace-line old-record-id-doxlgmkZ5e6IhJ9nkgYS2m1xxGb"><strong>Who We Are</strong></h2> <div class="ace-line ace-line old-record-id-doxlgDrOby1nBbDDVfrOObtnGKq">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: <em>We Before Me</em>, <em>Do the Right Thing</em>, and <em>Get Things Done</em>. These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er.</div> <h2 class="heading-2 ace-line old-record-id-doxlgdz9z1zQb8tUHyzuaWpI7dh"><strong>About the Opportunity</strong></h2> <div class="ace-line ace-line old-record-id-Ko1wd2h6hoMsRrxVCzrlT217gld">Building machine learning systems for risk at a global crypto exchange is fundamentally different from conventional ML engineering. The data spans on-chain activity, fiat deposits and withdrawals, trading behaviour, account access patterns, device intelligence, identity information, and customer interactions—signals that very few organizations can analyze together.<br><br></div> <div class="ace-line ace-line old-record-id-E2JpdWwZEo4P4Ax3gpulLNXqgth">The problems are complex, adversarial, and constantly evolving. Models must identify emerging fraud patterns, scams, account takeovers, payment abuse, and other forms of financial risk while minimizing disruption to legitimate customers. Success is not measured only through offline model <span style="color: rgb(0, 0, 0);">metrics. It is measured through prevented losses, improved approval rates, reduced false positives, faster investigations, and more reliable customer experience.<br><br></span></div> <div class="ace-line ace-line old-record-id-R5kGdpvusoyyUsxuqxqlusw5gwh"><span style="color: rgb(0, 0, 0);">This role sits within a multidisciplinary risk team of machine learning engineers, data scientists, risk strategy specialists, analytics engineers, product managers, and operations teams. You will work across the full ML lifecycle — from problem formulation, feature engineering, and model development to real-time deployment, monitoring, experimentation, and continuous iteration.<br><br></span></div> <div class="ace-line ace-line old-record-id-KSNsdBsHwoUyUQx2EQjlHtNSg0g"><span style="color: rgb(0, 0, 0);">You will also help shape how AI is used across the risk organization. LLM-assisted development, automated model workflows, AI-powered investigations, and intelligent review agents are part of the team’s daily work. We are looking for engineers who already use these tools effectively and can help establish safe, scalable, and production-ready AI practices.</span></div> <div class="ace-line ace-line old-record-id-doxlgWMp20q262cOC9QYqGTNPXf">&nbsp;</div> <h2 class="heading-2 ace-line old-record-id-doxlgK5IMX5llurO9anrnqzOPGg"><span style="color: rgb(0, 0, 0);"><strong>What You’ll Be Doing </strong></span></h2> <div class="ace-line ace-line old-record-id-doxlgm2vGZVqc2g0n4ks5rSndfh"><span style="color: rgb(0, 0, 0);">We’re looking for a Machine Learning Engineer to build models and AI tools that help detect fraud and protect users at a global crypto exchange. You’ll apply deep learning and XGBoost, develop practical AI agents, and use AI coding tools in your daily work.</span></div> <ul class="list-bullet1"> <li class="ace-line ace-line old-record-id-Xq6SdsQ2KoqKACxJHMTlNqXhgkg" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Build, evaluate, and deploy machine learning models for fraud and risk detection.</span></div> </li> <li class="ace-line ace-line old-record-id-AlA4dm3PjoMTPWxfuNMleELUgVd" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Improve data quality, features, and model performance, balancing fraud detection with customer experience.</span></div> </li> <li class="ace-line ace-line old-record-id-W7cUd1vzno6h6Px865wlM0atgCc" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Develop AI agents to support investigations, summarize cases, retrieve evidence, and automate routine workflows.</span></div> </li> <li class="ace-line ace-line old-record-id-AnvydMIpboObQ9xNfBdlmcMfgGh" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Use AI coding tools to accelerate development, testing, and debugging while reviewing and validating their output.</span></div> </li> <li class="ace-line ace-line old-record-id-Db9ndC90mo5OjIx0kz7l6uyqgmh" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Work with engineering, product, and risk teams to deploy solutions and monitor their impact.</span></div> </li> </ul> <div class="ace-line ace-line old-record-id-doxlgfBuScAqea8Lc0VGgH4s11g">&nbsp;</div> <h2 class="heading-2 ace-line old-record-id-doxlg74Ujs3hdmIFcwIAaC8mefb"><span style="color: rgb(0, 0, 0);"><strong>What We Look For In You </strong></span></h2> <ul class="list-bullet1"> <li class="ace-line ace-line old-record-id-It8CdlpqRoyDIhxAofRlkP7MgQb" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">A strong foundation in machine learning, with hands-on experience in deep learning and tree-based models such as XGBoost or LightGBM.</span></div> </li> <li class="ace-line ace-line old-record-id-MYNidGi56ocRiUxs1JxlvQAfg9c" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Strong Python skills and experience training, evaluating, and deploying models.</span></div> </li> <li class="ace-line ace-line old-record-id-RWKxdFewAokG3GxNAiFliWMwghd" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Some practical experience building AI agents or LLM applications, including tool calling, retrieval, or workflow automation. Prototypes and personal projects are welcome.</span></div> </li> <li class="ace-line ace-line old-record-id-AxZOdHFZioHaKfxeNXAljOiTgye" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Regular use of AI coding tools, with the ability to understand, test, and improve generated code.</span></div> </li> <li class="ace-line ace-line old-record-id-DwU3dqwrYonyF8xVt9hl4h08gmd" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Familiarity with databases and data pipelines for preparing training data and supporting ML workflows.</span></div> </li> <li class="ace-line ace-line old-record-id-HWxZdx1uwoiiYGxna6NlO8QAg6E" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Good problem-solving, communication, and collaboration skills.</span></div> </li> </ul> <div class="ace-line ace-line old-record-id-doxlgWZK1pBWUGxgdxrXiHQXnIb">&nbsp;</div> <h2 class="heading-2 ace-line old-record-id-doxlgvu0tFLiuP68VQzDLndy0Tc"><span style="color: rgb(0, 0, 0);"><strong>Nice to Haves</strong></span></h2> <ul class="list-bullet1"> <li class="ace-line ace-line old-record-id-YF51dD9yyorpocxgHmilMVFBg2W" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Experience in account takeover (ATO), scam detection, or other fraud and risk use cases.</span></div> </li> <li class="ace-line ace-line old-record-id-YjubdML9CohpmKxisUclTY4mgbh" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Experience with LLM training, fine-tuning, evaluation, and alignment.</span></div> </li> <li class="ace-line ace-line old-record-id-IbFid9fDIo7fTSxxYp2luq28g1e" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Experience with reinforcement learning algorithms and their practical implementation.</span></div> </li> <li class="ace-line ace-line old-record-id-P2oMdCLBLo53IKxTfOjlX1AGgxb" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Experience with real-time ML systems, imbalanced datasets, or model explainability.</span></div> </li> <li class="ace-line ace-line old-record-id-KBy1dgmr9onEhaxAsEglxeDTgdb" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Prior fraud or risk experience is helpful</span></div> </li> </ul> <div class="ace-line ace-line old-record-id-doxlgn7tTu7dtTybg651KJkxjJc">&nbsp;</div> <h2 class="heading-2 ace-line old-record-id-doxlgO24PMCDu44rWWfDSFfg9Eh"><span style="color: rgb(0, 0, 0);"><strong>Perks &amp; Benefits </strong></span></h2> <ul class="list-bullet1"> <li class="ace-line ace-line old-record-id-doxlgDEI6D1FC8wCNSmOHFepR6f" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Competitive total compensation package</span></div> </li> <li class="ace-line ace-line old-record-id-doxlgo6QzlRGhJo1ZzpUO02bSnf" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">L&amp;D programs for employees' growth and development</span></div> </li> <li class="ace-line ace-line old-record-id-doxlgt39d0KxUUKWgjwLVvUMqze" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Various team building programs and company events</span></div> </li> <li class="ace-line ace-line old-record-id-doxlgojsUt9Krk1ZLnjoB68Bdmg" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Wellness and meal allowances</span></div> </li> <li class="ace-line ace-line old-record-id-doxlgng9saqpQKmwKJk8UUbG5Mg" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">Comprehensive healthcare schemes for employees and dependants</span></div> </li> <li class="ace-line ace-line old-record-id-doxlgHUZC2HM0F6LqYwFryTBrRc" style="color: rgb(0, 0, 0);" data-list="bullet"> <div><span style="color: rgb(0, 0, 0);">More that we love to tell you along the process!</span></div> </li> </ul> <div class="ace-line ace-line old-record-id-BBu4diqh5oV607xL6PYlVohsgof">&nbsp;</div> <div class="ace-line ace-line old-record-id-AKl1d4gm9oxLOTx5ez8lILMBgTb"><span style="color: rgb(0, 0, 0);"><strong>OKX</strong><strong> Statement:</strong></span></div> <div class="ace-line ace-line old-record-id-DcV1ddJ3voU316xA2KslTUVIgdp"><span style="color: rgb(0, 0, 0);">OKX is committed to equal employment opportunities regardless of race, color, genetic information, creed, religion, sex, sexual orientation, gender identity, lawful alien status, national origin, age, marital status, and non-job related physical or mental disability, or protected veteran status. Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.</span></div> <div class="ace-line ace-line old-record-id-Nf1UdV1zWotHHcxvKDxlJ6c2g2b">&nbsp;</div> <div class="ace-line ace-line old-record-id-LCWPd8JOVozs3yxPxktlgNSKgUb"><span style="color: rgb(0, 0, 0);">The salary range for this position is $214,666 to $321,999</span></div> <div class="ace-line ace-line old-record-id-L5iGdxaBIogXZ3xsKtqlvOsvg1d"><span style="color: rgb(0, 0, 0);">The salary offered depends on a variety of factors, including job-related knowledge, skills, experience, and market location. In addition to the salary, a performance bonus and long-term incentives may be provided as part of the compensation package, as well as a full range of medical, financial, and/or other benefits, dependent on the position offered. Applicants should apply via OKX internal or external careers site.</span></div> <div class="ace-line ace-line old-record-id-VrEKdnOTsopMbtxsnDOlW9MzgzU">&nbsp;</div> <div class="ace-line ace-line old-record-id-YWLldhODgo3lwPxrjOYlSrPngtZ"><span style="color: rgb(255, 255, 255);">#LI-SK1 #LI-HYBRID</span></div> </div><div class="content-conclusion"><div data-lark-html-role="root"><span class="text-only" data-eleid="18"><span class="text-only"><span class="text-only" data-eleid="6">Notice:<br></span></span></span> <div data-lark-html-role="root"><span class="text-only" data-eleid="26"><span class="text-only">All official </span><span class="text-only text-with-abbreviation text-with-abbreviation-bottomline">OKX</span><span class="text-only"> vacancies are published on this website.</span></span> <span class="text-only" data-eleid="28"><span class="text-only">While roles may appear on selected third-party platforms from time to time, information on other sites may be inaccurate or outdated. </span></span><strong><span class="text-only" data-eleid="29"><span class="text-only">If in doubt, please apply directly through our official careers website.</span></span></strong></div> </div> <div data-lark-html-role="root"><span class="text-only" data-eleid="18"><span class="text-only">Information collected and processed as part of the recruitment process of any job application you choose to submit is subject to&nbsp;</span><span class="text-only text-with-abbreviation text-with-abbreviation-bottomline">OKX</span><span class="text-only">'s </span></span><a class="link rich-text-anchor __anchor-intercept-flag__ text-content-link" href="https://www.okx.com/en-eu/help/okx-candidate-privacy-notice" target="_blank" data-eleid="19" data-lark-is-custom="true" data-lark-link="true">Candidate Privacy Notice</a><span class="text-only" data-eleid="20"><span class="text-only">.</span></span></div></div>