Where does Clément Nguyen work?

Clément Nguyen is CTO of Lemrock.

What companies did Clément Nguyen found?

Clément Nguyen founded Lemrock.

Where did Clément Nguyen go to school?

Clément Nguyen studied at Y Combinator; ENS Paris-Saclay (Master 2 (M2) - MVA, Mathematics and Computer Science); École nationale des ponts et chaussées (Master of Science - MS, Mathematics and Computer Science).

Clément Nguyen

Founder

CTO at Lemrock

San Francisco, California, United States

FoundedLemrock

Find your path to Clément

2,068 people in our graph share verified history with Clément — schools, employers, funds. One of them is your warm intro.

Anne BouverotunlockedClément: together at Ecole normale supérieure (2021)

×4Clément: together at Ecole normale supérieure

×2Clément: together at Entrepreneur First 2025

×2Clément: together at Jumia Group

About

Clément is a returning Y Combinator founder who previously worked as a data scientist at Rakuten Advertising, building recommendation systems and scaling AI across the advertising technology stack. His technical background covers infrastructure, data pipelines, ad bidding, and agentic AI systems.

Likely email· guessed from name + firm domain, not firm-published

c•••@lemrock.comreveal75% confident

CTO at Lemrock

Intro paths

→

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

Lemrock's investors · 7

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

Co-founders at Lemrock

Roxane LaigleCEO

Sasha CollinCPO

Experience

LemrockCo-Founder & CTOcurrent2025 — presentSan Francisco Bay Area
Mindely (YC S24)Co-Founder2024 — 2025San Francisco, California, United States
Rakuten AdvertisingSenior Full-Stack Data Scientist2023 — 2024Paris, France
Rakuten AdvertisingData Scientist2021 — 2022Paris, Île-de-France, France
Ecole normale supérieureResearch Scholar2021Paris, Île-de-France, France
VEDECOMResearch Scholar2020Versailles, Île-de-France, France
Jumia GroupData Scientist2019Porto, Portugal
EuroviaCivil Construction Engineer2017Paris, France

Skills & more

Object Detection4Digital Image Processing3Natural Language Processing (NLP)4TTS4Machine Learning1MLOps1Full-Stack Development1PyTorch6Google Cloud Platform (GCP)1Node.js1C++6Python7

+6 more

Pack OfficeLaTeXSQLReact.jsHTMLFeuilles de style en cascade (CSS)

Languages Anglais · Espagnol · Français · Vietnamien

From Clément's professional profile.

Frequently asked questions

Who is Clément Nguyen?: Clément is a returning Y Combinator founder who previously worked as a data scientist at Rakuten Advertising, building recommendation systems and scaling AI across the advertising technology stack. His technical background covers infrastructure, data pipelines, ad bidding, and agentic AI systems.
Where does Clément Nguyen work?: Clément Nguyen is CTO of Lemrock.
What companies did Clément Nguyen found?: Clément Nguyen founded Lemrock.
Where did Clément Nguyen go to school?: Clément Nguyen studied at Y Combinator; ENS Paris-Saclay (Master 2 (M2) - MVA, Mathematics and Computer Science); École nationale des ponts et chaussées (Master of Science - MS, Mathematics and Computer Science).

Founder mafias

Y Combinator mafia10,444

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 OhanianPartnerFounded Reddit Fred EhrsamYC Summer 2012Founded Nudge +1 Matt HuangYC Winter 2011Founded Paradigm +1

+ 10,437 more →

Entrepreneur First mafia907

Also came through, then founded or led a company.

Reid HoffmanBoard MemberFounded LinkedIn +3 Matthew WilsonVenture PartnerFounded Veratrak +2 Rashid MansoorEntrepreneur, Inaugural CohortFounded HADEAN +2 Eugene CheahEntrepreneur First 2017Founded Recursal AI, Inc. +2 Ruban KanapathippillaiEntrepreneur First 2024Founded Iterate AI +1 Alice BentinckGeneral PartnerFounded Entrepreneurs First +1

+ 900 more →

ENS Paris-Saclay mafia20

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

+ 13 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 Carbon Farm Sasha CollinMaster of Science - MSFounded Lemrock

+ 9 more →

Collège Stanislas Paris mafia15

Also came through, then founded or led a company.

Anh-Tho ChuongClasse préparatoireFounded Get Lago +1 Pierre-Louis BiojoutAdmitted to École PolytechniqueFounded NanoCorp +1 Marie BardinetCPGE en filière ECSFounded Norma Alexis BonnafontClasses préparatoires aux grandes écolesFounded Excellence Learning Mattia MauroBachelor of Science - BSFounded Excellence Learning Paul-Henri BiojoutAdmission à l'école CentraleSupelecFounded .Wave

+ 8 more →

Same school

Also attended Y Combinator2,000

Tarek MansourCo-founder & CEO of Kalshi Suhail DoshiFounder of Mixpanel; founder of Particle Subomi OluwalanaCo-founder & CEO of Convoy Arhaan A.Deeptech Fellow at Clear Ventures Collin WallaceGeneral Partner at Lobby Capital Victor SantosVictor Scout at One Way Ventures

+ 1,994 more

Also attended ENS Paris-Saclay23

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

+ 17 more

Also attended École nationale des ponts et chaussées39

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

+ 33 more

Also attended Collège Stanislas Paris40

Marie BardinetInvestor at Daphni Louis DessalSenior Associate at Partech Ventures Pauline AnconaSenior Associate - Venture at Iris Capital Juliette Raoul-FortésaInvestment Manager at Capagro Louis DussartVP, Europe at RTP Global Marc WeillVC Analyst Intern at OneRagtime

+ 34 more

Shared employers

Also worked at Lemrock1

Sasha CollinCPO at Lemrock

Also worked at Rakuten Advertising7

Justin HallPartner at Golden Gate Ventures Greg ParsonsChairman of the Investment Committee at Alta Semper Capital Yvette LuiPartner at F7 Ventures Ulysse MizrahiFounder at Mindmesh Gregg GallettaPresident at Truthset Rick OkinExecutive Officer at Integral Ad Science

+ 1 more

Also worked at Ecole normale supérieure25

Arthur MenschCo-founder & CEO of Mistral AI Sofia DahouneInvestor at Daphni Christophe JurczakPartner at Quantonation Alexander Sinclair-Wilson执行董事 at Qiming Venture Partners Sasha LuccioniInvestor at Blue Tulip Ventures Elisabetta VesconiInvestment Manager at Planven Entrepreneur Ventures

+ 19 more

Also worked at VEDECOM1

Thomas CrochetFounder at Blaxel