2x founder

Mason Pierce

Cofounder/CTO @ TrainLoop (YC W25)

Founder

TrainLoop· Winter 2025 🇺🇸 San Francisco, California, United States

in LinkedIn 𝕏 @mlpierce22

2024Founder· Second

Founder · since 2024

Company

Second

Role

Founding Engineer

Stage

—

no public source

Raised

—

no public source

Based

San Francisco, California, United States

Founder / co-founder — the company's markEmployee / research role

Source: LinkedIn work history

Profile coverage5 of 7 · missing posts, contact

TrainLoop

Reasoning Fine-Tuning

Winter 2025

Experience

Career

TrainLoop
Co-founder
Co-Founder/CTO · San Francisco, California, United States · 2024 – Present
2024
Second
Founder
Founding Engineer · San Francisco, California, United States · 2024
2024
Camio
Senior Software Engineer · San Mateo, California, United States · 2023
2023
Camio
Software Engineer · San Mateo, California, United States · 2021 – 2023
2021
Camio
Front-End Engineer Intern · San Mateo, California, United States · 2020 – 2021
2020
Tech4Good
Tech4Good Fellow · University of California, Santa Cruz · 2019 – 2020
2019
Tech4Good
Undergraduate Research Assistant · Santa Cruz, California · 2018 – 2020
2018
Tech4Good
Undergraduate Research Assistant · Santa Cruz, California · 2018 – 2020
2018
University of California, Santa Cruz
Grader · Santa Cruz, California · 2018
2018
The Moving Crew
Mover · Auburn, California · 2014 – 2017
2014

Bio

My background is in applying AI models to business use-cases and have always found fine-tuning to be way harder than it should be - My mission is to unlock fine-tuning for all builders :)