TikTok
Research Scientist Graduate (Conversational AI)- 2027 Start (PhD)
Seattle, Washington · Full-time · Posted Oct 28, 2026
- Education
- PhD in CS/AI/Math/Quantitative degree or a related discipline; completing or recently completed.
About the job
Build and ship production conversational AI agents for TikTok e-commerce customer service, improving their runtime, memory, training, evaluation, safety, and performance across 30+ languages.
What you'll do
- Develop agent runtime, context and memory systems, tools, and safety controls.
- Build post-training, evaluation, and self-improving workflows using conversation data and rigorous experimentation.
- Own an end-to-end product surface and ship it to production, measuring outcomes such as CSAT and resolution or containment rate.
What they ask for
- Completing or recently completed a PhD in CS, AI, Math, a quantitative degree, or a related discipline.
- Strong Python and one of C++, Go, Rust, or Java.
- Solid ML, DL, and NLP fundamentals, with hands-on LLM or agent experience.
- Basic statistical literacy and ability to turn research or engineering writing into working code.
Nice to have
- Experience building agent runtimes, memory or context systems, RAG or tool-use agents, or fine-tuned/post-trained models.
- Relevant post-training, agent systems, evaluation, experimentation, self-improving systems, inference/serving, publications, competition results, or open-source contributions.
Tools
Python, C++, Go, Rust, Java, MCP, vLLM, TensorRT-LLM
AI focus
Develop conversational AI agents, including agent runtimes, memory and context engineering, post-training, evaluation, tool use, safety, and self-improving feedback loops.
Model-written summary · the original posting is authoritative