About
Joseph Metzinger studied computer science at UC Berkeley. He previously served as co-founder and CTO at Mozio from 2011 to 2020 before co-founding Stacksi, where he currently holds the CTO role.
Founder at StacksiYC W21
Intro paths
YC
Joseph went through Y Combinator (Winter 2021) β any YC alum in your network can reach them through the YC community.
β
In turn, Joseph can intro founders to Stacksi's investors below.
Stacksi's investors Β· 1
Co-founders at Stacksi
EM
Emre Murray MangirFounder
Experience
- DrataSenior AI Engineering Managercurrent2026 β presentLos Angeles Metropolitan Area
- DrataAI Engineering Manager2025 β 2026Los Angeles Metropolitan Area
- Mozio GroupBoard Member / Advisorcurrent2020 β presentSan Francisco Bay Area
- Mozio GroupFounder & CTO2011 β 2020San Francisco Bay Area
- SafeBaseHead of Innovation (Acquired by Drata)2023 β 2025Los Angeles Metropolitan Area
- StacksiFounder & CTO (acquired by SafeBase)2020 β 2023Los Angeles Metropolitan Area
Skills & more
PythonJava12MySQL3CDjango1PerlAndroidRuby on Rails2Objective-C1Microsoft Office1LispAlgorithms6
+5 more
ManagementStart-upsSocial MediaTestingLeadershipFrom Joseph's professional profile.
Frequently asked questions
- Who is Joseph Metzinger?
- Joseph Metzinger studied computer science at UC Berkeley. He previously served as co-founder and CTO at Mozio from 2011 to 2020 before co-founding Stacksi, where he currently holds the CTO role.
- Where does Joseph Metzinger work?
- Joseph Metzinger is Founder of Stacksi.
- What companies did Joseph Metzinger found?
- Joseph Metzinger founded Stacksi.
- Where did Joseph Metzinger go to school?
- Joseph Metzinger studied at University of California, Berkeley (Bachelor of Arts, Computer Science); Y Combinator.
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 California, Berkeley mafia538
Also came through, then founded or led a company.
Steve WozniakBSFounded AppleTony XuB.S.Founded DoorDashAravind SrinivasDoctor of Philosophy - PhDFounded PerplexityAli GhodsiPost-docFounded DatabricksRyan PetersenBAFounded FlexportDavid FriedbergBAFounded Climate +2
+ 531 more
SafeBase mafia2
Also came through, then founded or led a company.
Same school
Also attended University of California, Berkeley1,611
Byron DeeterPartner at Bessemer Venture PartnersSteve WozniakCo-founder of AppleTony XuCo-founder & CEO of DoorDashAravind SrinivasCo-founder & CEO of Perplexity AIAli GhodsiCo-founder & CEO of DatabricksRyan PetersenFounder & CEO of Flexport
+ 1,605 more
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
Shared employers
Also worked at Drata22
Houman HaghighiPartner, Business & Corporate Development at Menlo VenturesSydney SloanChief Marketing Officer at Scale Venture PartnersGlenn SolomonInvestor at GGV CapitalOren YungerInvestor at GGV CapitalJake SeidGeneral Partner at Ballistic VenturesChrisInvestor at Perceptive Ventures Management Company, Llc
+ 16 more
Also worked at Mozio Group1
Also worked at SafeBase12
Dave LuFounder at Hyphen CapitalPriya SaiprasadInvestment Advisory Council at Neythri Futures FundEvan WijayaPrincipal at Touring CapitalHilarie Koplow-McAdamsVenture Partner at New Enterprise Associates (NEA)Kyle McNultyInvestor at In-Q-TelTal ZackonPrincipal at F2 Capital
+ 6 more