About
Seiji Yamamoto spent nine years at Meta as a Senior Staff Research Scientist, focusing on large language model development, inference optimization, speech models, and computer vision. He holds a PhD in Physics with published research in top-tier journals and completed postdoctoral work at a national laboratory.
Founder at PerfectBit, Inc.YC X26
Intro paths
YC
Seiji went through Y Combinator (Spring 2026) — any YC alum in your network can reach them through the YC community.
GP
Their group partner at YC was Garry Tan, President & CEO of Y Combinator — the partner who ran PerfectBit, Inc.'s batch and knows the company first-hand. YC profile ↗
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In turn, Seiji can intro founders to PerfectBit, Inc.'s investors below.
PerfectBit, Inc.'s investors · 3
Co-founders at PerfectBit, Inc.
PV
Peter VajdaFounder
Experience
- PerfectBitco-Founder and co-CEOcurrent2025 — presentSan Francisco Bay Area
- MetaResearch Scientist Manager (Senior Staff)2023 — 2025San Francisco Bay Area
- MetaEngineering Manager2020 — 2023San Francisco Bay Area
- SalesforceDirector of Engineering2019 — 2020San Francisco Bay Area
- FacebookNews Feed (ranking and recommendations)2016 — 2019Menlo Park
- Grand Rounds, Inc.Various roles2015 — 2016San Francisco
- Palantir TechnologiesForward Deployed team and later product team2013 — 2015Palo Alto, Chicago, New York, London, Paris
- UBSInvestment Strategy2013Greater New York City Area
- National High Magnetic Field LaboratoryPostdoctoral Associate2009 — 2011Tallahassee, Florida Area
Skills & more
Deep Learning
From Seiji's professional profile.
Frequently asked questions
- Who is Seiji Yamamoto?
- Seiji Yamamoto spent nine years at Meta as a Senior Staff Research Scientist, focusing on large language model development, inference optimization, speech models, and computer vision. He holds a PhD in Physics with published research in top-tier journals and completed postdoctoral work at a national laboratory.
- Where does Seiji Yamamoto work?
- Seiji Yamamoto is Founder of PerfectBit, Inc..
- What companies did Seiji Yamamoto found?
- Seiji Yamamoto founded PerfectBit, Inc..
- Where did Seiji Yamamoto go to school?
- Seiji Yamamoto studied at Stanford University (Bachelor of Science - BS, Physics); Rice University (Doctor of Philosophy - PhD, Physics); Columbia University (Master of Science - MS, Financial Engineering).
Founder mafias
Y Combinator mafia8,773
Also came through, then founded or led a company.
Sam AltmanPresidentFounded Tools for Humanity +3Jessica LivingstonCo-founderFounded Y CombinatorAlexis OhanianYC Summer 2005Founded RedditFred EhrsamYC Summer 2012Founded Nudge +1Matt HuangYC Winter 2011Founded HotspotsTrae StephensYC Winter 2022Founded Pursuit +1
+ 8,766 more
Stanford University mafia903
Also came through, then founded or led a company.
Peter ThielJ.D.Founded PayPal +1Reid HoffmanB.S.Founded LinkedIn +2Joe LonsdaleBSFounded Opto +3Mike Maples JrBSFounded Pattern BreakersSteve JurvetsonMSEEFounded Mojo VisionBalaji SrinivasanGraduate StudentFounded Counsyl +1
+ 896 more
Columbia University mafia200
Also came through, then founded or led a company.
Ben HorowitzBAFounded OpswareChris DixonBachelor of Arts - BAFounded HunchKai-Fu LeeA.B.Founded 01Robin ChanB.A.Founded Operator +2Kevin M. SlawinB.A.Founded Perseus SENOLYTIX +2Joey LevyBachelor of Arts (B.A.)Founded Draftpot +2
+ 193 more
Salesforce mafia88
Also came through, then founded or led a company.
Alexander BruehlCo-Investor ⇨ ContentfulFounded Geckoboard +3Eric TobiasVice President, ProductFounded Opendate +1John DillonCEOFounded Hyperion Solutions +1Dave KelloggSVP/GM of Service CloudFounded Marklogic +1Paul HsiaoInvestorFounded PipeDreams +1Howie LiuProductsFounded Etacts +1
+ 81 more
Rice University mafia52
Also came through, then founded or led a company.
Brian ArmstrongMaster’s DegreeFounded Coinbase +1Chris GibsonBachelor of Science (B.S.)Founded Recursion (NASDAQ: RXRX) +1Web SmithStudy: RussianFounded Mizzen+Main +1Jonathan BehrB.S.Founded Tilos Therapeutics +1Jeffrey DietrichBSFounded Rarebird +1Rebecca LeeBachelor’s DegreeFounded Elayne +1
+ 45 more
Same school
Also attended Stanford University2,000
Peter ThielCo-founder & Partner at Founders FundReid HoffmanCo-founder of LinkedIn; Partner at GreylockDavid SacksCo-founder & General Partner at Craft Ventures; former White House AI & Crypto CzarKeith RaboisManaging Director at Khosla VenturesGarry TanPresident & CEO of Y CombinatorAlfred LinPartner at Sequoia Capital
+ 1,994 more
Also attended Rice University139
Brian ArmstrongCo-founder & CEO of CoinbaseAbigail JohnsonPartner, Chief Operating Officer at Sapphire VenturesEdi DanalacheSenior Associate at Scale Venture PartnersJim BridenstineManaging Partner, Artemis Group at Cortado VenturesPatrick OkoraforDirector of Finance at Mercury FundSharon KedarCo-Founder, Partner at Northpond Ventures
+ 133 more
Also attended Columbia University726
Ben HorowitzCo-founder & General Partner at Andreessen HorowitzDoug LeonePartner at Sequoia Capital; former Global Managing PartnerChris DixonFounder & Managing Partner of a16z crypto at Andreessen HorowitzKai-Fu LeeChairman of Sinovation Ventures and CEO of 01.AIGabriella GiglioHR & Executive Talent at General CatalystScott BillerInvestor at GV (Google Ventures)
+ 720 more
Shared employers
Also worked at PerfectBit1
Also worked at Meta304
Nat FriedmanCo-lead of Meta Superintelligence Labs; co-founder of NFDGDaniel GrossMeta Superintelligence Labs; co-founder of NFDG and Safe SuperintelligenceDrew HoustonCo-founder & CEO of DropboxGabriel PereyraCo-founder & President of HarveyTinaInvestments & Portfolio Services Team Member at Clear VenturesMike ArpaiaComputer scientist working on machine learning and data infrastructure
+ 298 more
Also worked at Salesforce253
Mark SusterManaging Partner at Upfront VenturesMarc BenioffCo-founder, Chair & CEO of SalesforceParker HarrisCo-founder of SalesforceViviana FagaGeneral Partner at Felicis VenturesJob SimonVenture Partner and CTO at Monta Vista CapitalWesley BarrowPartner at Correlation Ventures
+ 247 more
Also worked at Grand Rounds, Inc.7
Sam KirschnerVice President at Village GlobalCraig ShermanPartner at Meritech Capital PartnersKingsley ClementsPartner at Dragoneer Investment GroupJoseph AnsanelliPartner at Greylock PartnersMike MatteoVenture Partner at Oak HC/FTAnu VoraManaging Director, Candid Ventures & CEO, PayTile at Cintrifuse Capital
+ 1 more