AI Search Engineer: LLM & Multimodal, Full-Stack

TikTok; Singapore; On-site; SGD 120,000 - 170,000; Full time

Job summary

TikTok is seeking talented individuals to join the Search Team responsible for building and owning our search engine, delivering the best user search experience. You will work on full-stack search engine systems, leveraging information retrieval, NLP, CV, multimodal and recommender technologies, in a culture that values self-direction, curiosity, openness, and problem-solving.

As a graduate or early career professional, you will contribute to AI Search Agents, LLM-based query understanding, and

Qualifications

• Bachelor's or Master's degree in Software Development, Computer Science, Computer Engineering, or a related technical discipline.
• Proficient in C++/Python, with solid foundation in algorithms and data structures.
• Basic understanding of LLM fundamental principles (e.g. prompt engineering, fine-tuning workflows).
• Strong problem-solving skills with proven experience delivering technical projects.
• Solid foundation in machine learning and deep learning, with practical experience in NLP, CV or related domains.

Responsibilities

• Build AI Search Agents with planning, memory, and tool-use capabilities, applying reinforcement learning, knowledge representation, and automated decision-making technologies to solve complex problems end-to-end.
• Optimize LLM-based query understanding capabilities, process multi-turn conversation semantic analysis, and ensure accurate and objective search results through LLM reasoning.
• Develop LLM technologies to adapt to diverse search scenarios, including pre-training strategies and efficient RLHF algorithms, to improve core metrics such as search relevance and timeliness.
• Utilize multimodal large models for visual representation learning and video understanding, strengthening search retrieval capabilities.
• Optimize RAG and LLM pipelines, improve retrieval ranking algorithms, train and optimize LLM answer generation capabilities (e.g. fine-tuning, inference optimization), and enhance the relevance and structured presentation of search results.
• Translate cutting-edge LLM/Agent technology research outcomes into production environments, collaborating with cross-functional teams to drive product iteration and upgrades.

Skills

C++/Python proficiency

LLM / RLHF basics

NLP / CV / Multimodal understanding

Algorithmic problem solving

Research collaboration

Education

Bachelor's or Master's in Computer Science/Software Engineering

Job description

TikTok is seeking talented individuals to join the Search Team responsible for building and owning our search engine, delivering the best user search experience. You will work on full-stack search engine systems, leveraging information retrieval, NLP, CV, multimodal and recommender technologies, in a culture that values self-direction, curiosity, openness, and problem-solving.

As a graduate or early career professional, you will contribute to AI Search Agents, LLM-based query understanding, and