LLM & Multimodal AI ML Engineer – E‑Commerce

TikTok USDS Joint Venture; Seattle (WA); On-site; USD 130,000 - 246,000; Full time

Job summary

TikTok USDS Joint Venture LLC is building a world-class team to architect LLM-based systems that process diverse data, from text to logs and conversations, ensuring robust governance and secure ecosystem integrity. On-site Seattle operations leverage a strong risk framework for merchant and user protection in a content-driven e-commerce environment.

Ideal candidates bring ML/NLP expertise, experience shaping production-grade AI services, and proficiency in one of C++, Python, Go, or Java, with

Qualifications

• Experience in ML/NLP/Computer Vision.
• Proficiency in at least one language: C++, Python, Go, or Java.
• Advanced degree in a relevant field is required.

Responsibilities

• Architect and develop sophisticated LLM-based systems to process high-dimensional unstructured data from diverse sources.
• Define and implement complex semantic understanding frameworks, including fine-grained intent classification and entity extraction.
• Apply state-of-the-art techniques to enhance model performance (Instruction Tuning, RLHF/DPO, Contextual Prompt Engineering).
• Optimize model serving for production with quantization, distillation, and efficient attention mechanisms.

Skills

ML/NLP experience

Programming languages

Education

MS or PhD in CS/AI/Math

Job description

TikTok USDS Joint Venture LLC is building a world-class team to architect LLM-based systems that process diverse data, from text to logs and conversations, ensuring robust governance and secure ecosystem integrity. On-site Seattle operations leverage a strong risk framework for merchant and user protection in a content-driven e-commerce environment.

Ideal candidates bring ML/NLP expertise, experience shaping production-grade AI services, and proficiency in one of C++, Python, Go, or Java, with