Senior / Lead Algorithm Engineer, Overseas Growth

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 Role

We're looking for a Senior/Lead Algorithm Engineer to build our overseas growth algorithm capabilities from the ground up. You'll design and implement end-to-end ML systems that optimize paid advertising (Google, Meta), intelligent user targeting, and LTV prediction across 100+ countries and millions of users.

This is a high-impact role with significant ownership - you'll define the technical direction, build scalable systems, and directly influence how OKX acquires and retains high-value users globally. As the area matures, you'll have the opportunity to scale the team and grow into Staff Engineer or Engineering Manager roles.

What You'll Build

Paid Ads Optimization

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Design intelligent bidding algorithms for Google Ads, Meta Ads, and other paid channels to optimize CPA, ROAS, and user quality

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Build automated budget allocation systems across campaigns, geos, and channels based on real-time performance and predicted LTV

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Develop creative performance prediction models to guide A/B testing

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Implement multi-touch attribution models to accurately measure channel contribution

User Targeting & Selection

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Build lookalike modeling and audience expansion algorithms to identify high-value user segments

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Design propensity models for conversion prediction at different funnel stages (registration, KYC, deposit, first trade)

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Develop real-time user scoring systems to optimize bid adjustments and personalized experiences

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Create behavioral clustering models to identify user personas and refine targeting strategies

LTV Prediction & Retention

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Build LTV prediction models incorporating user behavior, market conditions, and engagement patterns

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Develop early signals detection to identify high-LTV users within 24-72 hours

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Design churn prediction and reactivation models to optimize retention campaigns

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Implement cohort analysis to track performance across channels and time periods

Requirements

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3+ years of hands-on experience in growth algorithms, performance marketing, or user acquisition optimization

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Strong expertise in ML frameworks: PyTorch, TensorFlow, XGBoost, LightGBM

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Proficiency in Python and SQL; experience with big data processing (Spark, Flink, or similar)

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Demonstrated ability to work independently and drive 0→1 projects

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Strong communication skills in English; Chinese proficiency is a plus

Preferred

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Background in fintech, cryptocurrency, or high-growth tech companies

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Knowledge of blockchain technology and crypto user behavior

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Experience with deep learning for sequence modeling and user behavior prediction

What We Offer

Impact & Growth

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High ownership role with autonomy to build and define technical direction

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Direct impact on OKX's global growth (millions in marketing spend optimization)

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Opportunity to scale the team and hire as the platform grows

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Work on cutting-edge ML problems at massive scale

Location Details

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China (Remote): Work remotely from major cities with occasional travel to HK/SG for collaboration

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Hong Kong: Office-based

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Singapore: Office-based

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.

#LI-DY #LI-ONSITE

Notice:

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