Fundraising Fox

Theodore Janson

Founder

Founder at FINNY AI

New York, New York, United States

FoundedFINNY AI · YC

30 Under 30 2026 · AI

About

Theodore Janson is co-founder and CTO at FINNY AI. He previously worked as an applied machine learning engineer at an early-stage fintech startup developing statistical models and large language models for financial analysis, and held research positions in LLM explainability and particle physics. He holds degrees in electrical engineering and computer science from École Polytechnique and McGill University.

Founder at FINNY AIYC S24

Intro paths

YC

Theodore went through Y Combinator (Summer 2024) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Jon Xu, General Partner at Y Combinator — the partner who ran FINNY AI's batch and knows the company first-hand. YC profile ↗

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In turn, Theodore can intro founders to FINNY AI's investors below.

FINNY AI's investors · 4

Activant CapitalNew York · $100K – $50M checksMaple VCSan Francisco · $500K – $1.5M checks · since 2025VenrockPalo Alto · $500K – $10M checks · since 2025Y CombinatorSan Francisco · $500K checks · since 2024

Co-founders at FINNY AI

EOEden Ovadia
Eden OvadiaFounder
VTVictoria Toli
Victoria ToliFounder

Experience

  1. FINNY (YC S24)Co-Founder & CTOcurrent2023 — presentNew York, NY
  2. SFJ Technologies LLCML Engineer2022 — 2023New York, NY
  3. Craft AIML Research2023Paris
  4. McGill UniversityResearch Assistant2021Montreal, QC
  5. Sargent's Bay Yacht ClubHead Race Coach2017 — 2019
  6. ValtechMarketing and Data Analytics Intern2018Montreal, Quebec, Canada

Skills & more

Deep Learning5Machine Learning5Natural Language Processing (NLP)2PyTorch4

Languages English · French

From Theodore's professional profile.

Frequently asked questions

Who is Theodore Janson?
Theodore Janson is co-founder and CTO at FINNY AI. He previously worked as an applied machine learning engineer at an early-stage fintech startup developing statistical models and large language models for financial analysis, and held research positions in LLM explainability and particle physics. He holds degrees in electrical engineering and computer science from École Polytechnique and McGill University.
Where does Theodore Janson work?
Theodore Janson is Founder of FINNY AI.
What companies did Theodore Janson found?
Theodore Janson founded FINNY AI.
Where did Theodore Janson go to school?
Theodore Janson studied at Y Combinator; École Polytechnique (Master of Science - MS, Artificial Intelligence); McGill University (Bachelor of Engineering - BE, Major Electrical Engineering).

Founder mafias

Y Combinator mafia8,773

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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

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Y Combinator mafia4,716

Also came through, then founded or led a company.

Ryan SheaEntrepreneurshipFounded StacksTarek MansourFounded KalshiSuhail DoshiEating beans & riceFounded Playground +1Subomi OluwalanaW22Founded ConvoyDarius "Bubs" MonsefS19Founded Sightbox +3Matthew ScholzFounded Oisin Biotechnologies +3

+ 4,709 more

McGill University mafia80

Also came through, then founded or led a company.

Noubar AfeyanBSFounded ProFound Therapeutics +12Avak KahvejianPh.D.Founded ProFound Therapeutics +5Jeffrey KarpBENGFounded Tissium +3Serge MesserlianMaster of Science - MScFounded Creyon +1Natalia BakaevaArtsFounded cashew +1Jonathan LimMDFounded Boundless Bio +1

+ 73 more

École Polytechnique mafia70

Also came through, then founded or led a company.

Arthur MenschMaster of ScienceFounded Mistral AIThomas WolfFounded Hugging FaceRodolphe ArdantPhysicsFounded SpendeskMatt RouifB.SFounded Photoroom +3Anne OsdoitMaster of Science (MS)Founded Moon Surgical +2Jean Yves StephanIngénieur de l'Ecole Polytechnique (Master's degree)Founded Data Mechanics +1

+ 63 more

Selwyn House School mafia2

Also came through, then founded or led a company.

Phil CutlerFounded Paper

Same school

Also attended Y Combinator2,000

Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyArhaan A.Deeptech Fellow at Clear VenturesMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports Ventures

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Also attended École Polytechnique180

Arthur MenschCo-founder & CEO of Mistral AIThomas WolfCo-founder & Chief Science Officer of Hugging FaceRodolphe ArdantFounder & President of SpendeskCyriac ParisotInvestor at Index VenturesMichal NatoraSenior Investment Director - Industrial IT & Robotics at Emerald Technology Ventures AgPascal Levy-GarbouaVenture Partner at Long Journey Ventures

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Also attended McGill University579

Harley FinkelsteinInvestor at Felicis VenturesMattias LjungmanInvestor at Moonfire VenturesNoubar AfeyanInvestor at Flagship PioneeringDavid NaultGeneral Partner at Luge CapitalLaviva MazharPrincipal at Luge CapitalLisa PurcellInvestor at Third Rock Ventures

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Also attended Selwyn House School6

Norman FioreGeneral Partner at Dawn Capital LLPMarcus DanielsCEO and Founding Partner at Highline BetaMax NiederhoferPartner at Heartcore CapitalPhil CutlerFounder at Paper at Lalotte VenturesChristophe RainvillePrincipal at Mosaic VenturesEmmanuel FerreiraAssociate at Novacap

Shared employers

Also worked at FINNY (YC S24)3

Nick BeimPartner at VenrockEden OvadiaFounder at FINNY AIVictoria ToliFounder at FINNY AI

Also worked at McGill University76

Arthur MenschCo-founder & CEO of Mistral AILaviva MazharPrincipal at Luge CapitalRami HannoushVenture Partner at Versant VenturesDidem AltopGeneral Partner at Treeo VCMelina HoffmannInvestor at SynconaUsamah KhanVice President, Head of Data & Technology at White Star Capital

+ 70 more

Also worked at Valtech4

Florencia Herra VegaPartner & CTO; CEO of Toboggan Labs at AlleyCorpLopo ChampalimaudInvestor at FELIX CAPITALDaniel GrossmannManaging Partner & Co-Founder at Kharis CapitalNikoleta PopkostadinovaHead of Marketing at LAUNCHub Ventures