Machine Learning Engineer, TikTok - Business Governance

• About the Team We are building next-generation Trust & Safety systems powered by large language models and multimodal foundation models to protect TikTok, Lemon8, and short-form video platforms. Our team focuses on multimodal reasoning, content understanding, and large-scale risk detection across text, image, audio, and video. We actively explore and productionize cutting-edge technologies such as LLM post-training, multimodal models, and AI Agents to build intelligent, scalable, and adaptive content moderation systems.

• Responsibilities - What You II Do

• Develop content safety algorithms for TikTok, Lemon8, and short-form drama platforms, covering multimodal understanding and risk detection across video, text, image, and audio

• Leverage machine learning, deep learning, and large model technologies to improve content moderation pipelines, enhance operational efficiency, and ensure model robustness and production stability

• Own the training and application of LLMs and MLLMs for content safety use cases, including post-training techniques such as SFT, RLHF, DPO, and safety alignment

• Drive the exploration and productionization of emerging capabilities such as AI Agents, multimodal reasoning, and video understanding to build next-generation intelligent moderation systems Minimum Qualifications:

• Bachelor degree or above in Computer Science, Software Engineering, Artificial Intelligence, Mathematics, or related fields

• Strong understanding of machine learning and deep learning, with familiarity with Transformer architectures, LLMs, and MLLMs

• Hands-on experience in Python, PyTorch, distributed training, and large-scale data processing, with solid algorithmic and engineering capabilities

• Proven ability to solve complex problems and collaborate effectively in cross-functional teams, with a track record of driving projects to high-quality execution

Preferred Qualifications:

• Hands-on experience with LLM post-training, multimodal understanding, AI Agents, or Trust & Safety systems is desirable
• Publications in academic conferences such as NeurIPSICMLICLRCVPRECCVICCVACLEMNLPNAACLInterspeechICASSP, and others are a strong plus