Senior ML Engineer — E‑commerce LLM & Multimodal AI

TikTok USDS Joint Venture; Seattle (WA); On-site; USD 178,000 - 342,000; Full time

Benefits offered by this job

Medical insurance

Dental & Vision insurance

401(k) with company match

Parental leave

Disability coverage

Life insurance

Wellbeing benefits

Paid holidays

Paid sick days

Paid personal time

Job summary

TikTok USDS Joint Venture seeks a senior ML/AI engineer to architect and build LLM-based systems that process high-dimensional data from diverse sources. You will define semantic frameworks with fine-grained intent classification and entity extraction, and apply cutting-edge techniques like RLHF/DPO and Contextual Prompt Engineering.

On-site position in the Seattle area with a strong governance and security focus.

Qualifications

• MS or PhD in Computer Science, AI, Mathematics, or related field.
• 5+ years of professional experience in Machine Learning, NLP, or Computer Vision.
• Proficiency in C++, Python, Go, or Java.

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, including Instruction Tuning, RLHF/DPO, and Contextual Prompt Engineering.
• Optimize model serving for production environments using quantization, distillation, and efficient attention mechanisms.

Skills

Machine Learning

NLP

Computer Vision

Education

MS/PhD in CS/AI/Math

Tools

C++

Python

Go

Java

Job description

TikTok USDS Joint Venture seeks a senior ML/AI engineer to architect and build LLM-based systems that process high-dimensional data from diverse sources. You will define semantic frameworks with fine-grained intent classification and entity extraction, and apply cutting-edge techniques like RLHF/DPO and Contextual Prompt Engineering.

On-site position in the Seattle area with a strong governance and security focus.