Where does Sasha Collin work?

Sasha Collin is CPO of Lemrock.

Where did Sasha Collin go to school?

Sasha Collin studied at Y Combinator (S24 batch); ENS Paris-Saclay (Master 2 (M2) - MVA, Mathematics and Computer Science); Harvard University (Computer Science).

Sasha Collin

Founder

CPO at Lemrock

Greater Paris Metropolitan Region

FoundedLemrock

Find your path to Sasha

14,936 people in our graph share verified history with Sasha — schools, employers, funds. One of them is your warm intro.

Laura BuhlerunlockedSasha: together at McKinsey & Company

×5Sasha: together at Harvard University

×5Sasha: together at Y Combinator

Sasha: together at École nationale des ponts et chaussées

About

Sasha is a returning Y Combinator founder whose background combines artificial intelligence engineering with product leadership. He has developed AI agents and personalization models for major consumer companies, with hands-on experience in large language models and agentic pipelines.

CPO at Lemrock

Intro paths

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In turn, Sasha can intro founders to Lemrock's investors below.

Lemrock's investors · 6

AgoranovParis Entrepreneur FirstBengaluru · $1M – $7M checks Galion.exe$275K – $2.8M checks · since 2026 Sie VenturesLondon SonorcapParis Transpose Platform ManagementHouston

Co-founders at Lemrock

Roxane LaigleCEO

Clément NguyenCTO

Experience

LemrockCo-Foundercurrent2025 — presentParis, Île-de-France, France
Mindely (YC S24)Co-Founder & CTO2024 — 2025San Francisco Bay Area
McKinsey & CompanyLead Data Scientist2024Paris, Île-de-France, France
McKinsey & CompanySenior Data Scientist2023 — 2024Paris, Île-de-France, France
McKinsey & CompanyData Scientist2021 — 2023
QuantumBlack, AI by McKinseyLead Data Scientist2021 — 2024Paris, Île-de-France, France
Institut du Cerveau – Paris Brain InstituteResearch Scholar2021Paris, Île-de-France, France
InriaResearch Scholar2021Paris, Île-de-France, France
Harvard Medical SchoolResearch Assistant2019 — 2020Boston, Massachusetts, United States
Jumia GroupData Scientist2019Porto Metropolitan Area

Skills & more

Team Leadership2Python (Programming Language)6genAI6Optimization7Machine Learning3Quantum Computing3Luxury Brand Marketing1kedro1Software Development1MLOps1Python11C++9

+11 more

LaTeXGestion de projetAnalyse de donnéesSQLRGitFrenchEnglishGermanHebrewPortuguese

Languages English · French · German · Hebrew · Portuguese

From Sasha's professional profile.

Frequently asked questions

Who is Sasha Collin?: Sasha is a returning Y Combinator founder whose background combines artificial intelligence engineering with product leadership. He has developed AI agents and personalization models for major consumer companies, with hands-on experience in large language models and agentic pipelines.
Where does Sasha Collin work?: Sasha Collin is CPO of Lemrock.
What companies did Sasha Collin found?: Sasha Collin founded Lemrock.
Where did Sasha Collin go to school?: Sasha Collin studied at Y Combinator (S24 batch); ENS Paris-Saclay (Master 2 (M2) - MVA, Mathematics and Computer Science); Harvard University (Computer Science).

Founder mafias

Y Combinator mafia10,218

Also came through, then founded or led a company.

Sam AltmanPresidentFounded Tools for Humanity +3 Garry TanPresident & CEOFounded Y Combinator +1 Jessica LivingstonCo-founderFounded Y Combinator Alexis OhanianAmbassador to the EastFounded Reddit Fred EhrsamYC Summer 2012Founded Nudge +1 Matt HuangYC Winter 2011Founded Paradigm +1

+ 10,211 more

Entrepreneur First mafia886

Also came through, then founded or led a company.

Reid HoffmanBoard MemberFounded LinkedIn +2 Matthew WilsonFounder In ResidenceFounded Veratrak +2 Rashid MansoorEntrepreneur, Inaugural CohortFounded HADEAN +2 Eugene CheahEntrepreneur First 2017Founded Recursal AI, Inc. +2 Steven RenwickCohort memberFounded Tilores +2 Ruban KanapathippillaiEntrepreneur First 2024Founded Iterate AI +1

+ 879 more

McKinsey & Company mafia725

Also came through, then founded or led a company.

Elad GilConsultantFounded Brain Co. +1 Mike SpeiserAssociateFounded Pure Storage Fabrice GrindaConsultantFounded FJ labs Tony XuBusiness AnalystFounded DoorDash Alexandre ProtAssociateFounded Smartven +1 Jagmeet LambaSenior Strategy ConsultantFounded Certa +3

+ 718 more

ENS Paris-Saclay mafia17

Also came through, then founded or led a company.

Arthur MenschMaster of ScienceFounded Mistral AI Jerome de Tycheyéconomie et gestionFounded Cometh Jerry ChenMaster's DegreeFounded Digital Bruno VegrevilleMaster's degreeFounded Hera Geoffrey NegiarMaster of Science (M.S.)Founded The Forecasting Company Raphael KriefMRes MVAFounded Weel

+ 10 more

École nationale des ponts et chaussées mafia16

Also came through, then founded or led a company.

Christophe BarreM1Founded Tandem +1 Cristian BartoloméExchange StudentFounded Factored +1 Bruno Fernandez-RuizApplied Mathematics & Computer ScienceFounded Nexar Antonin ParrotEngineering degreeFounded River Markets Vassily CarantinoMS in Applied Mathematics & EconomicsFounded Carbonfarm Clément NguyenMaster of Science - MSFounded Lemrock

+ 9 more

Same school

Also attended Y Combinator2,000

Ryan SheaCo-founder of Blockstack (Stacks)Suhail DoshiFounder of Mixpanel; founder of Particle Arhaan A.Deeptech Fellow at Clear Ventures Akshat GoenkaInvestor at Moonfire Ventures Jon XuGeneral Partner at Y Combinator Chris GoldaGeneral Partner at Y Combinator

+ 1,994 more

Also attended ENS Paris-Saclay21

Arthur MenschCo-founder & CEO of Mistral AI Mathieu GoudotSenior Partner at Circular Innovation Fund Michal ValkoInvestor at KAYA Jerome de TycheyInvestor at ATKA Louise-Marie RakotoarisonAnalyst at Kurma Partners Sarah LoertscherAssociate at ISALT - Investissements Stratégiques en Actions Long Terme

+ 15 more

Also attended Harvard University2,000

Ron ConwayFounder of SV Angel Alfred LinPartner at Sequoia Capital Chris DixonFounder & Managing Partner of a16z crypto at Andreessen Horowitz Sarah TavelVenture Partner at Benchmark Danny RimerPartner at Index Ventures Laela SturdyManaging Partner at CapitalG

+ 1,994 more

Also attended École nationale des ponts et chaussées38

Julia AndreInvestor at Index Ventures Felipe MendesDirector of Finance Brazil at Valor Capital Group Guillaume SarlatVenture Partner at Axeleo Capital Stéphane VillecrozeManaging Partner at Demeter Antoine VedrennePartner at Citizen Capital Aurore AsparInvestment Director at Citizen Capital

+ 32 more

Shared employers

Also worked at Lemrock1

Clément NguyenCTO at Lemrock

Also worked at McKinsey & Company2,000

Elad GilSolo general partner investing through Gil Capital Ann Miura-KoCo-founding Partner at Floodgate Jeremy LiewPartner at Lightspeed Venture Partners Mike SpeiserManaging Director at Sutter Hill Ventures Jeremy LevinePartner at Bessemer Venture Partners Fabrice GrindaCo-founder & Managing Partner at FJ Labs

+ 1,994 more

Also worked at Institut du Cerveau – Paris Brain Institute2

Julien ElricSenior Principal at Jeito Capital Delphine CharvinFounding Chief Executive Officer & Board Director at Elkedonia

Also worked at Inria53

Arthur MenschCo-founder & CEO of Mistral AI Sandeep BhadraGeneral Partner at Vertex Ventures Kathy PhamInvestor at Blue Tulip Ventures Michal ValkoInvestor at KAYA Philippe JostManaging Director, Head of Product Development and Solutions, Head of Risk at Capital Dynamics Jean KrivineInvestor at ATKA

+ 47 more