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Machine Learning Engineer, TikTok Content Recommendation (Ecosystem & Cold-Start)

San Jose, United States of America💼 Full-time🗓 2026-09-28

Core

Design and optimize TikTok's content distribution and author growth mechanisms to ensure a healthy content ecosystem.

Role type

Senior IC machine learning engineer (recommendation systems)

Builds

Large-scale recommendation algorithms and architectures for various scenarios

Domain

Social media, content recommendation, deep learning

Deliverable

production ML models

Required skills

C++, Python, applied machine learning, large-scale recommendation systems, multi-task learning, multi-modal technology, reinforcement learning, causal inference, graph neural networks

Preferred skills

mathematics, computer vision, NLP, meta-learning, active learning, lifelong learning

Responsibilities

Build industry-leading recommendation systems to improve user experience and platform security; deliver end-to-end ML solutions for critical product challenges; own full-stack ML systems and optimize algorithms/infrastructure; collaborate on product strategies to grow TikTok in key markets.

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