Machine Learning Engineer, E-commerce Governance Algorithms

About the Team- Shaping the Future of Global E-Commerce Experience We are the Governance & Experience Algorithm Team — a trailblazing AI force at the forefront of building a trusted, efficient e-commerce ecosystem. Established in 2020, we leverage Graph Neural Networks, Multi-Objective Optimization, Time Series Prediction, and Large Language Models (LLM) to tackle some of the most complex challenges in e-commerce: Quality Revolution Combat low-quality products and fraudulent practices across millions of listings: - Detect low-quality items, counterfeit goods, and false advertising. - Identify "not-as-described" discrepancies between product claims and actual quality. - Flag risky sellers through comprehensive quality assessments. Fulfillment & Logistics Experience Reinvention Enhance delivery reliability and operational efficiency: - Resolve delivery delays and non-receipt issues. - Prevent inventory shortages via predictive analytics. - Optimize warehouse operations for faster order fulfillment. Why Our Work Matters: - We protect users globally, ensuring safe shopping experiences in international markets and beyond. - Our innovations power TikTok’s mission to “Inspire Creativity, Bring Joy” by fostering trust and delight in every transaction. - We’re not just solving problems—we’re redefining industry standards for e-commerce product, service, and logistics experiences. What You’ll Do

1. Lead Cutting - Edge AI Projects - Build graph-powered risk networks to uncover similar product clusters and high-risk seller/creator groups in emerging markets, reducing false advertising incidents in global regions. - Develop LLM-based multi-modal systems using cross-modal fusion (text, images, behavioral data) to detect false advertising and low-quality products. Deploy AI-powered product business suggestions to improve seller compliance and user trust. - Lead time-series forecasting innovation for logistics performance metrics (e.g., delivery delays, cancellation rates), driving improvement in the e-commerce experience through predictive analytics.
2. Solve Complex Business Challenges - Develop multi-task models using MMoE and dynamic loss functions, driving measurable improvements in platform product, service, and logistics health. - Transform supply chains by optimizing warehouse product quality qualification strategies to cut missing recalls and reduce warehouse costs. - Unleash RPD/RPR growth through causal inference frameworks, identifying hidden correlations between CCR and user behavior to design personalized recommendations.
3. Redefine Industry Standards - Optimize LLM reasoning with DPO/GRPO to enhance fraud detection, outperforming traditional SFT methods. Enhance tabular data modeling for better explainability in e-commerce risk assessments. - Construct heterogeneous graphs modeling product - seller - creator - video - user relationships, enabling improvements in product lifecycle insights and detection of similar product patterns. - Build unified time-series forecasting models across products, sellers, creators, videos, and users, achieving SOTA performance in predicting inventory shortages and demand surges.

Minimum Qualifications: Technical Mastery: - Proficient in Python/C++ and machine learning frameworks (PyTorch/TensorFlow). - Deep experience with graph neural networks, time series analysis, or LLM. Domain Expertise: - 3+ years in anti-fraud, prediction/forecasting, e-commerce governance, or related fields. - Track record of delivering AI solutions with measurable business impact. Preferred Qualifications Problem - Solving Mindset: - Passion for tackling ambiguous challenges and translating ideas into scalable solutions. - Strong communication skills to collaborate cross - functionally and influence stakeholders.