Machine Learning Engineer - Multimodal Content Understanding, Intelligent Integrity

About the Team and Role

The Business Integrity team is dedicated to developing highly reliable and scalable platforms with a strong user-centric approach. We focus on delivering superior commercial intelligence through next-generation content understanding systems for TikTok monetization. This role entails collaborating globally across disciplines to build cutting-edge machine learning models that enhance user experience and advertiser value by leveraging advanced AI technologies.

Key Responsibilities

• Lead algorithm research and development focused on ad content comprehension and security, utilizing large models such as LLM/MLLM and other AIGC technologies applied to e-commerce and short-video advertisements to create a next-generation commercial intelligence review system.
• Advance multimodal understanding techniques across text, audio, video, and live streaming, optimize autonomous decision-making models for high accuracy in risk assessment, and develop interpretable chain-of-thought (CoT) generation for transparent decision traceability.
• Investigate reinforcement learning and agent-based methods for multimodal content review scenarios, track emerging AIGC trends, and translate algorithmic innovations into practical engineering solutions aligned with commercial requirements.
• Design specialized multimodal models for ad intent detection, intelligent rule retrieval, and precise risk evaluation to enhance advertiser creative processes, minimize risks of undetected non-compliant content, and safeguard the advertising ecosystem.

Qualifications and Experience

• Master’s degree or higher in Computer Science, Artificial Intelligence, Mathematics, Statistics, or closely related disciplines.
• At least one year of hands-on algorithm research, development, or project implementation experience in content understanding or AI-generated content (AIGC) domains.
• Strong theoretical background in machine learning and deep learning; comprehensive knowledge of MLLM/LLM, computer vision, natural language processing, multimodal fusion, and agent technologies; solid mathematical skills combined with excellent self-learning and analytical problem-solving capabilities.
• Proficiency in PyTorch and TensorFlow frameworks with practical experience training, fine-tuning, and deploying large-scale models; advanced programming skills in Python and C++.
• Familiarity with the technical fundamentals and real-world applications of multimodal large-scale models; prior work involving content understanding, advertising analytics, multimodal representation learning, or intelligent content review is preferred.
• Publication record in recognized computer science or machine learning conferences is an advantage.

About TikTok

TikTok is the premier platform for short-form mobile video content, headquartered in Los Angeles and Singapore with offices worldwide. Its mission centers on inspiring creativity and spreading joy.

Why Join Our Team

At TikTok, innovation and authentic expression drive our product and culture. Our diverse global workforce strives to create value and inspiration each day with curiosity, humility, and resilience. We embrace challenges as opportunities and maintain an "Always Day 1" mindset to achieve significant breakthroughs. Joining us means limitless potential for growth and impact.

Diversity & Inclusion

We are committed to fostering an inclusive environment that respects diverse skills and perspectives. TikTok aims to reflect the varied communities it serves by promoting a culture of mutual respect and belonging.