Senior Software Engineer – Global E-Commerce Search Infrastructure (TikTok Shop)

What you'll do

• Design and ship search agents, RAG pipelines, and agent workflows across Q&A, chatbot, and visual search.
• Improve multi-turn and cross-lingual query understanding and optimize answer generation for relevance and latency.
• Build personalized memory and feature-serving infrastructure, and help bring agent and LLM research into production.

What they ask for

• Bachelor’s or Master’s in Computer Science, Computer Engineering, or a related technical field.
• At least 5 years of industry experience building large-scale distributed systems, search infrastructure, or low-latency online services.
• Proficiency in C++, Go, or Java; strong systems fundamentals including data structures, OS, networking, multithreading, and Linux performance tuning.
• Solid grasp of LLM and agent technologies, including RAG, tool use, and multi-turn reasoning, with production AI systems experience.

Nice to have

• Experience in large-scale search, recommendation, advertising, or personalization; agentic systems or production RAG pipelines.
• Familiarity with LLM inference optimization, post-training workflows, or research publications at the listed conferences.

Tools

C++, Go, Java, RAG, MCP, vLLM, TensorRT-LLM, SGLang

AI focus

Build production AI search agents and LLM-powered shopping experiences; develop query understanding, personalized memory, RAG, post-training, and inference optimization.