About
John previously worked at Microsoft, where he optimized Excel's performance and led the porting of Excel's grid rendering technology to mobile platforms.
Founder at KeyDBYC S20
Intro paths
YC
John went through Y Combinator (Summer 2020) — any YC alum in your network can reach them through the YC community.
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In turn, John can intro founders to KeyDB's investors below.
KeyDB's investors · 2
Co-founders at KeyDB
BS
Ben SchermelFounder
Experience
- Phasar LabsChief Executive Officercurrent2025 — presentToronto, ON
- Snap Inc.Engineering Manager2022 — 2025Toronto, Ontario, Canada
- EQ Alpha TechnologyFounder and CEO2018 — 2022Toronto, Ontario, Canada
- MicrosoftSenior Engineer2015 — 2017
- MicrosoftSDE II2010 — 2015Redmond, WA
- MicrosoftSDE Intern2007 — 2009Redmond WA
- MixxxDeveloper/Contributor2007 — 2008
- Ryerson UniversityResearch Assistant2007
- Wal-Mart CanadaCustomer Service Manager2004 — 2006Oakville, ON
Skills & more
Win32 API1Architecture2Distributed Systems1Software Development5Object Oriented DesignXBRLC#3C++9Linux2C2PHP1VHDL
+1 more
Visual StudioFrom John's professional profile.
Frequently asked questions
- Who is John Sully?
- John previously worked at Microsoft, where he optimized Excel's performance and led the porting of Excel's grid rendering technology to mobile platforms.
- Where does John Sully work?
- John Sully is Founder of KeyDB.
- What companies did John Sully found?
- John Sully founded KeyDB.
- Where did John Sully go to school?
- John Sully studied at Ryerson University (B.Sc, Computer Science); White Oaks Secondary School.
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
Ryerson University mafia8
Also came through, then founded or led a company.
Lee LiuBachelor of Commerce (Co-op)Founded Mezmo +1Angie LauBAFounded ForkastMichael PetrovFounded CoupleFilipa Mendonça-VieiraB.Sc.Founded AppcanaryYarden HorwitzBachelor of CommerceFounded SPATETurja ChowdhuryBachelor of Science - BSFounded Village Labs
+ 1 more
Same school
Also attended Ryerson University34
Can Deniz TokmanInvestment | Growth Funds at 212Angie LauImpact Partner at Fresco CapitalChris HuberAdvisor / Independent Member of Investment Committee at Naples Technology VenturesMohamed ElabshihySenior Associate at Graphite VenturesNaeem LakhaniManaging Partner at The First ThirtyMohamed SolimanCo-Founding & Managing Partner at Ventioneers Capital
+ 28 more
Shared employers
Also worked at Snap Inc.69
Evan SpiegelCo-founder & CEO of SnapLucy GuoCo-founder of Scale AI; founder & CEO of PassesJoshua XuCo-founder & CEO of HeyGenJustin RoseInvestment Team at 8VCSelby DrummondSenior Strategic Officer at Plum Alley InvestmentsSteve HorowitzPartner at Alpha Edison
+ 63 more
Also worked at Microsoft1,177
Reid HoffmanCo-founder of LinkedIn; Partner at GreylockGarry TanPresident & CEO of Y CombinatorNat FriedmanCo-lead of Meta Superintelligence Labs; co-founder of NFDGKai-Fu LeeChairman of Sinovation Ventures and CEO of 01.AIBill GatesCo-founder of Microsoft; Chair of the Gates FoundationMike KriegerCo-founder of Instagram; Chief Product Officer at Anthropic
+ 1,171 more
Also worked at Ryerson University9
David BorcsokPartner at Mucker CapitalMichelle McBaneManaging Director at Stand Up VenturesMohamed ElabshihySenior Associate at Graphite VenturesAlex KolodkinFounder Network - Startup Operations & Marketplace Growth at DMZSen SachiHead of Programming at Toronto Business Development Centre (TBDC)Ehsan MirdamadiGeneral Partner at Archangel Network of Funds
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+ 3 more