Liam Chen

AI Engineer · LLMs, Agents & Computer Vision

Available now San Francisco, USAExpertJoined Aug 11, 2026

$90/hr

Fixed projects from $6,000

4.5

(2)

About

I build AI products that actually ship. RAG pipelines, custom agents, fine-tuned models and computer vision systems for production.

Skills

Python· EXPERT

TensorFlow· EXPERT

PyTorch· EXPERT

LangChain· EXPERT

OpenAI API· EXPERT

Computer Vision· EXPERT

NLP· EXPERT

AWS· EXPERT

Portfolio

Defect detection CV

Real-time defect detection at 99.2% accuracy on a factory line.

Vision

RAG support assistant

Enterprise knowledge assistant over 1M+ docs with citations.

RAGLLM

Employment history

ML Engineer

AI Research Lab

Sep 1, 2019 — Present

Building production ML systems.

Education

M.Sc, Artificial Intelligence

UC Berkeley

2015 — 2017

Client reviews

BrightPixel Studio

Aug 11, 2026

Delivered ahead of schedule

Working with this freelancer was a pleasure. Professional, responsive and the quality exceeded our expectations. Communication was clear throughout and the final deliverable was polished.

NovaTech Solutions

Aug 11, 2026

Exceptional work, highly recommend

Working with this freelancer was a pleasure. Professional, responsive and the quality exceeded our expectations. Communication was clear throughout and the final deliverable was polished.