LLM (Large Language Model) Engineer, TikTok Search Intern - 2025 Start

Responsibilities

About the team
Our Search Team is responsible for TikTok search LLM application algorithms, covering multiple scenarios including AI Search, and TikTok AI Bot. We generate search question-answer cards to provide a better search experience and develop TikTok's official AI assistant, applying LLM ChatBot capabilities to help users better utilize TikTok. By closely integrating with business scenarios, we connect people, information, and services, driving TikTok's business growth.

Candidates can apply to a maximum of two positions and will be considered for jobs in the order you apply. The application limit is applicable to TikTok and its affiliates' jobs globally.
Applications will be reviewed on a rolling basis - we encourage you to apply early.
Successful candidates must be able to commit to at least 3 months long internship period.

Responsibilities
- Build large-scale high-quality data, train and optimize machine learning models for search, integrate state-of-the-art large language models (LLMs) into traditional video search systems, and reduce costs and latency through self-developed models and inference optimization.
- Utilize LLMs to understand users' complex queries, support multi-round conversations, conduct semantic analysis on queries and documents, and provide users with accurate and objective search results.
- Establish an AI search infrastructure, optimize the retrieval and ranking algorithms in Retrieval Augmented Generation (RAG), be responsible for the training and optimization of the large language models used for answer generation, and enhance the richness of search results and structured presentation.