About
Justin Ko was an early engineer at Brex working on growth, card, and cash products, and previously co-founded SpeakGenius, an English learning application. He studied entrepreneurship at the University of Southern California.
Founder at OpkitYC S21
Intro paths
YC
Justin went through Y Combinator (Summer 2021) — any YC alum in your network can reach them through the YC community.
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In turn, Justin can intro founders to Opkit's investors below.
Opkit's investors · 4
Co-founders at Opkit
SC
Sherwood CallawayCo-founder/CEO
Experience
Skills & more
Start-ups12Web Design19Product Management8Research24Data Analysis20Event Planning13Social Media13Marketing12Web Development23Customer Service12Express25WebRTC22
+12 more
LeadershipPublic SpeakingTeamworkJavaScriptNode.jsReact.jsC++SQLAngularJSPowerPointMicrosoft ExcelMicrosoft OfficeLanguages Korean
From Justin's professional profile.
Frequently asked questions
- Who is Justin Ko?
- Justin Ko was an early engineer at Brex working on growth, card, and cash products, and previously co-founded SpeakGenius, an English learning application. He studied entrepreneurship at the University of Southern California.
- Where does Justin Ko work?
- Justin Ko is Founder of Opkit.
- What companies did Justin Ko found?
- Justin Ko founded Opkit.
- Where did Justin Ko go to school?
- Justin Ko studied at Y Combinator (S21); University of Southern California (Bachelor's Degree).
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
University of Southern California mafia137
Also came through, then founded or led a company.
Marc BenioffB.S.B.A.Founded SalesforceGabriel PereyraBachelor's degreeFounded HarveyKent WakefordJuris Doctorate (J.D.)Founded Breaking +4Matt MichelsonM.S.Founded Evid Science +1Jinal JhaveriMaster of ScienceFounded SchoolMint +1Danny WenBachelor of Science - BSFounded Crowdmade +1
+ 130 more
Brex mafia34
Also came through, then founded or led a company.
Henrique DubugrasCo-founder & co-CEOFounded StoneRitik MalhotraDirector, Product ManagementFounded Savvy +2Tanooj LuthraHead of Engineering for Startups + BankingFounded Elph +1Cullen WilsonProduct Design LeadFounded WP Engine +1Asa MillerDesign EngineerFounded Pre +1Brendan FalkBusiness DevelopmentFounded Hercules +1
+ 27 more
Sazabi mafia4
Also came through, then founded or led a company.
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
+ 1,994 more
Also attended University of Southern California490
Shaun MaguirePartner at Sequoia CapitalMarc BenioffCo-founder, Chair & CEO of SalesforceGabriel PereyraCo-founder & President of HarveyDamir BecirovicInvestor at Index VenturesVojtech HornaInvestor at Index VenturesNatalie VaisInvestor at Spark Capital
+ 484 more
Shared employers
Also worked at Sazabi4
Also worked at Opkit1
Also worked at Brex57
Henrique DubugrasCo-founder & former chairman of BrexPedro FranceschiCo-founder & CEO of BrexKatie BiberChief Operating Officer at ParadigmAyesha AroraVenture Partner at S32Jake SeidGeneral Partner at Ballistic VenturesMatt MocharyInvestor at Fortius Ventures
+ 51 more
Also worked at SpaceX148
Roelof BothaAdvisor & former Steward at Sequoia Capital; SpaceX board memberSteve JurvetsonCo-founder of Future VenturesAsanka JayasuriyaPortfolio Support at 8VCJustin RoseInvestment Team at 8VCGarry HillInvestment at Makers FundHelen LiangFounder & General Partner at FoundersX Ventures
+ 142 more