Ashton Chew
Founding Engineer at Theta (YC X25)
I work on computer use and tool use agents at Theta, building RL infra and researching RL envs.
Before, I was a Machine Learning Engineer Intern at Amazon AGI on the inference team, working on evals and optimized tool use for Nova Sonic.
I also contribute to SGLang and Harbor.
I like to build toward problems.
Theta (YC X25) Aug 2025 – Present
Founding Engineer
Building infra, RL environments, and product for computer use agents.
thetasoftware.com Amazon AGI May 2025 – Aug 2025
Software Development Engineer (AI/ML)
Inference team. Efficient tool use, observability, and model eval infrastructure for Nova Sonic.
Won the first Amazon Global AI Expo Hackathon (600+ employees).