About
Jof Arnold is a cofounder of FitFu, a motion-tracking fitness application.
Founder/Co-designer at FitFuYC W11
Intro paths
YC
Jof went through Y Combinator (Winter 2011) — any YC alum in your network can reach them through the YC community.
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In turn, Jof can intro founders to FitFu's investors below.
FitFu's investors · 1
Co-founders at FitFu
BG
Benjie GillamFounder
Experience
- EnginiraCTO & Co-Foundercurrent2025 — presentLondon Area, United Kingdom
- TipaltiSoftware Engineering Manager2021 — 2025Greater London
- Springboard Code LtdFreelance Software Engineer and Consultant2021London, England, United Kingdom
- Big HealthLead Software Engineer2018 — 2021
- GraphQL TrainingCourse Developer (Frontend) & Co-founder2017 — 2018London, United Kingdom
- BrainBakerySenior Freelance Frontend Developer (Reactjs, Design, Node, GraphQL...)2006 — 2018London, UK
- Timecounts IncSenior Frontend Developer / Co-founder2013 — 2016London, United Kingdom
- FitFu.comCo-founder / Co-designer2010 — 2012Mountain View California and London, England
- i-togetherCo-founder2007 — 2008
- DelphiLead Engineer2003 — 2007
- (Self-Employed)Motorsport Contractor2002 — 2003
- Moscow Aviation InstituteSpacecraft Design Engineer2000
- BNFL Remote OperationsRobotics design and software engineer1997 — 1998
Skills & more
Full-Stack DevelopmentArtificial Intelligence (AI)Product Strategy1Software Management1Engineering Management1User Experience (UX)Software Development14Web Development7Web Applications12User Experience41Start-ups35Entrepreneurship22
+12 more
Mobile ApplicationsProgrammingBusiness DevelopmentTDDAgile MethodologiesTypeScriptContinuous IntegrationJavaScriptReact.jsGraphQLNode.jsCSSFrom Jof's professional profile.
Frequently asked questions
- Who is Jof Arnold?
- Jof Arnold is a cofounder of FitFu, a motion-tracking fitness application.
- Where does Jof Arnold work?
- Jof Arnold is Founder/Co-designer of FitFu.
- What companies did Jof Arnold found?
- Jof Arnold founded FitFu.
- Where did Jof Arnold go to school?
- Jof Arnold studied at Y Combinator (Startups, Business); Imperial College London (Mechanical Engineer, 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
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
Imperial College London mafia196
Also came through, then founded or led a company.
Brent HobermanAdvisor, Innovation FundFounded Founders Pledge +3Nessan BerminghamDoctor of Philosophy - PhDFounded Korro Bio +2Alice BentinckComputer Science Department Industrial Liaison BoardFounded Entrepreneurs First +1Ahmed DeyabMSc Advanced Computational Methods for AeronauticsFounded Instagram +1Sebastian TrousilPhDFounded City Therapeutics +1Slava SolonitsynMBAFounded No Cap +1
+ 189 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
Shared employers
Also worked at Tipalti1
Also worked at Delphi10
Juan FigueroaLead Backend Engineer at Struck CapitalAntonio LückInvestor at MatterScale VenturesMartin DoberManaging Director at ID VenturesLuka TomljenovicPartner at Radius Capital VenturesScott StankiewiczVenture Partner at REFASHIOND VenturesDawid BieńkowskiHuman Capital Partner / Managing Partner for Value Creation at Warsaw Equity Group
+ 4 more