Fundraising Fox

Chalmers Brown

Founder

Co-Founder & CEO at Jarmin

San Francisco, California, United States

FoundedJarmin · YC

About

Chalmers Brown is a staff engineer from Meta's SuperIntelligence Labs and a former JPMorganChase software engineer with experience in automation tools for technical roles. He completed computer science studies at Rutgers University and has participated in business education programs at Harvard and Stanford.

Co-Founder & CEO at JarminYC F25

Intro paths

YC

Chalmers went through Y Combinator (Fall 2025) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Nicolas Dessaigne, General Partner at Y Combinator — the partner who ran Jarmin's batch and knows the company first-hand. YC profile ↗

→

In turn, Chalmers can intro founders to Jarmin's investors below.

Jarmin's investors · 1

Y CombinatorSan Francisco · $500K checks · since 2025

Co-founders at Jarmin

SHShirsendu Halder
Shirsendu HalderCo-Founder & Head of ML
ZLZack Leman
Zack LemanCo-Founder & CTO

Experience

  1. Jarmin (YC F25)Co-Founder & CEOcurrent2025 — presentSan Francisco, California, United States
  2. USA Team HandballTeam USA Athletecurrent2018 — present
  3. MetaStaff Software Engineer2024 — 2025Menlo Park, California, United States
  4. Byte Detection (Techstars '23)Founder2023 — 2024
  5. Unit21Lead Solutions Architect2020 — 2023San Francisco, California, United States
  6. DueCTO & Co-Founder2015 — 2020Palo Alto, CA
  7. Shimmur (now Community.com)Founding Engineer2014 — 2015
  8. JPMorganChaseSoftware Engineer2013Manhasset, New York, United States

Frequently asked questions

Who is Chalmers Brown?
Chalmers Brown is a staff engineer from Meta's SuperIntelligence Labs and a former JPMorganChase software engineer with experience in automation tools for technical roles. He completed computer science studies at Rutgers University and has participated in business education programs at Harvard and Stanford.
Where does Chalmers Brown work?
Chalmers Brown is Co-Founder & CEO of Jarmin.
What companies did Chalmers Brown found?
Chalmers Brown founded Jarmin.
Where did Chalmers Brown go to school?
Chalmers Brown studied at Y Combinator (Fall 2025); Stanford University (Non-degree program, Artificial Intelligence | Linear Systems and Optimization | Logic); Harvard Business School Online (CORe Credential of Readiness - Business Analytics | Financial Accounting | Economics for Manager).

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

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

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

Rutgers University mafia29

Also came through, then founded or led a company.

Ryan BednarBSFounded RankScience +1Harsh YadavMaster of ScienceFounded Ryse +1Anshu AgarwalMaster of Science - MSFounded NimbellaTino WakedBAFounded TAPTAPKevin BittermanBAFounded Editas MedicineDave RosenbergB.A.Founded MuleSoft

+ 22 more

Harvard Business School Online mafia28

Also came through, then founded or led a company.

Jinal JhaveriDisruptive Strategy by Clayton Christensen,NegotiationFounded SchoolMint +1Sasha OrloffContinuing EducationFounded LendUp +1Upeka BeeThe Leadership Consortium by Frances FreiFounded DianaHR +1Santiago RibadeneiraDisruptive Strategy & Innovation - Clayton ChristensenFounded FastFarmaBen ScruggsCORe: Credential of ReadinessFounded Altis BiosystemsZach KaplanBusinessFounded Inventables

+ 21 more

Same school

Also attended Y Combinator2,000

Tarek MansourCo-founder & CEO of KalshiSuhail DoshiFounder of Mixpanel; founder of ParticleSubomi OluwalanaCo-founder & CEO of ConvoyMaroof AhmedFounder at Octopus VenturesJustin SwartPartner at Bitkraft Esports VenturesCollin WallaceGeneral Partner at Lobby Capital

+ 1,994 more

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 Harvard Business School Online152

MariaInvestor at InvestinorKelsey BeausoleilBusiness Development Network at Redpoint VenturesOliver MarquesPartner, Capital Formation at March Capital PartnersJohn DemeterInvestor at Khosla VenturesJeff RoseAdvisor at AI CapitalRobAdvisor at TFX Capital

+ 146 more

Also attended Rutgers University120

Jigar RaythathaInvestor at Third Rock VenturesRobin LiInvestor at GGV CapitalDominique LittleGovernment Affairs Lead at ParadigmGanesh PersadVice President & Chief Information Officer at Flare Capital PartnersMark FieldsInvestor at Alsop Louie PartnersBasil AlomaryPrincipal, Head of Research & Growth Strategy at Stripes

+ 114 more

Shared employers

Also worked at Jarmin (YC F25)2

Shirsendu HalderCo-Founder & Head of ML at JarminZack LemanCo-Founder & CTO at Jarmin

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 Unit216

Wesley YiuPrincipal at Alumni VenturesPaola Cordovez CerecedaInvestor at Diagram CollectiveSam O'KeefeFounder/Head of Business Development at MicroEvalMiguel ToledoFounder at FlexRiya JagetiaCo-Founder & CEO at Socratix AITrisha KothariFounder & CEO at Unit 21

Also worked at JPMorganChase338

Alexandra FarmerPrincipal at Intel Capital, North AmericaErica VanInvestment Director at Intel CapitalEricAdvisor at Clear VenturesDavid GoldenManaging Partner, Revolution VenturesTodd KleinManaging Partner, Revolution Growth at RevolutionNick ZurickTalent Lead at Pantera Capital

+ 332 more