Seiji Yamamoto

Startup Founder

Co-founder

PerfectBit, Inc.· Spring 2026 San Francisco Bay Area

in LinkedIn

2025Co-founder· PerfectBit

Founder · since 2025

Company

PerfectBit

Role

co-Founder and co-CEO

current

Stage

—

no public source

Raised

—

no public source

Based

San Francisco Bay Area

current

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

Source: LinkedIn work history

Profile coverage5 of 7 · missing posts, contact

PerfectBit, Inc.

Correct by construction AI training data

Spring 2026

Experience

Career

PerfectBit
Co-founder
co-Founder and co-CEO · San Francisco Bay Area · 2025 – Present
2025
Meta
Research Scientist Manager (Senior Staff) · San Francisco Bay Area · 2023 – 2025
2023
Meta
Engineering Manager · San Francisco Bay Area · 2020 – 2023
2020
Salesforce
Director of Engineering · San Francisco Bay Area · 2019 – 2020
2019
Facebook
News Feed (ranking and recommendations) · Menlo Park · 2016 – 2019
2016
Grand Rounds, Inc.
Various roles · San Francisco · 2015 – 2016
2015
Palantir Technologies
Forward Deployed team and later product team · Palo Alto, Chicago, New York, London, Paris · 2013 – 2015
2013
UBS
Investment Strategy · Greater New York City Area · 2013
2013
National High Magnetic Field Laboratory
Postdoctoral Associate · Tallahassee, Florida Area · 2009 – 2011
2009

Bio

Led teams in the Core Llama group at Meta Superintelligence Labs. Senior Staff Research Scientist across 9 years at Meta spanning LLM pre-training and post-training, inference optimization, full-duplex speech models, and computer vision vision models. Before tech: PhD in Physics, published in Proceedings of the National Academy of Sciences and Physical Review Letters, co-authored with Fields Medalist. Educated at Stanford, Rice, Columbia, post-doc at a National Lab.