Machine Learning Engineer on TikTok's Business Governance team focused on building content safety systems using multimodal understanding and large language model technologies.
Responsibilities
- Develop content safety algorithms for TikTok, Lemon8, and short-form drama platforms, enabling multimodal understanding and risk detection across video, text, image, and audio
- Leverage machine learning, deep learning, and large model technologies to improve moderation pipelines, boost operational efficiency, and ensure model robustness and production stability
- Own the training and deployment of LLMs and MLLMs for content safety use cases, including post-training techniques such as SFT, RLHF, DPO, and safety alignment
- Drive exploration and productionization of emerging capabilities like AI Agents, multimodal reasoning, and video understanding to build next generation intelligent moderation systems
Requirements
- Bachelor degree or higher in Computer Science, Software Engineering, Artificial Intelligence, Mathematics, or related fields
- Strong understanding of machine learning and deep learning, with familiarity of Transformer architectures, LLMs, and MLLMs
- Hands-on experience with Python, PyTorch, distributed training, and large-scale data processing, plus solid algorithmic and engineering capabilities
- Proven ability to solve complex problems and collaborate effectively in cross-functional teams, with a track record of delivering high quality results
Technologies
Compensation and Benefits
- Salary: USD 156,000 - 387,600 per year
- Location: San Jose, CA onsite
Benefits
- Medical, dental, and vision insurance
- 401(k) savings plan with company match
- Paid parental leave
- Short-term and long-term disability coverage
- Life insurance
- Wellbeing benefits
- 10 paid holidays per year
- 10 paid sick days per year
- 17 days of Paid Personal Time prorated upon hire with increasing accruals by tenure
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
About TikTok
TikTok is the leading destination for short-form mobile video. Our mission is to inspire creativity and bring joy. Our global headquarters are in Los Angeles and Singapore, with offices in New York City, London, Dublin, Paris, Berlin, Dubai, Jakarta, Seoul, and Tokyo.
Why Join Us
Joining TikTok means contributing to a product that enables authentic expression, discovery, and connection. Our diverse teams collaborate to create value for communities, foster curiosity, and drive meaningful impact through innovation in a rapidly growing tech company.
Diversity and Inclusion
TikTok is committed to building an inclusive space where employees are valued for their skills, experiences, and perspectives. We celebrate diverse voices and strive to reflect the communities we reach in our workplace and products.
TikTok Accommodation
TikTok provides reasonable accommodations in our recruitment processes for candidates with disabilities, pregnancy, sincerely held religious beliefs, or other protected reasons. For assistance or accommodation requests, please visit: https://tinyurl.com/RA-request
For Los Angeles County (Unincorporated) Candidates
- Qualified applicants with arrest or conviction records will be considered under applicable laws, including the Los Angeles County Fair Chance Ordinance and the California Fair Chance Act
- Criminal history may affect duties such as unsupervised client contact, handling confidential information, and exercising sound judgment
Job Information
- Base salary range in San Jose, CA: USD 156,000 - 387,600 annually
- Compensation may vary by qualifications, skills, and location; total package may include discretionary bonuses and stock units
- Benefits include day one medical, dental, and vision coverage, 401(k) with company match, paid parental leave, disability coverage, life insurance, wellbeing benefits, 10 holidays, 10 sick days, and 17 days of paid personal time prorated by tenure
