About
Peter Greczner is CTO at Affinity. He has spent nearly 15 years working with early-stage companies in AdTech, FinTech, and Crypto, and was a founding engineer at Bread, where he led the engineering team prior to its $500M acquisition.
Founder at AffinityYC S23
Intro paths
YC
Peter went through Y Combinator (Summer 2023) — 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 Affinity's batch and knows the company first-hand. YC profile ↗
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In turn, Peter can intro founders to Affinity's investors below.
Affinity's investors · 8
8VCAustin · $100K – $50M checks · since 2026Advance Venture PartnersSan Francisco · $10M – $25M checks · since 2026Clocktower VenturesSanta Monica · $100K – $20M checksGreat Oaks Venture CapitalNew York · $50K – $500K checksMassMutual VenturesSpringfield · $500K – $5M checks · since 2026Menlo VenturesSan Francisco · $1M – $20M checks · since 2026Pear VCSan Francisco · $150K – $4M checksY CombinatorSan Francisco · $500K checks · since 2023
Co-founders at Affinity
FR
Faraz RanaFounder
Experience
- AffinityCo-Foundercurrent2023 — presentNew York, NY
- Ormatta LLCFoundercurrent2021 — presentNew York, United States
- Knights of DegenCo-Founder2021 — 2023New York, United States
- BreadDistinguished Engineer2020 — 2021
- BreadSenior Director Of Engineering2019 — 2020Greater New York City Area
- BreadSenior Software Engineer, Platform Lead2014 — 2019Greater New York City Area
- Rubicon ProjectSoftware Engineer2014Greater New York City Area
- iSocketSoftware Engineer2014Greater New York City Area
- Spruce MediaEngineer2013 — 2014New York, NY
- Castle Ridge MediaCTO/Head Engineer2012 — 2013Brooklyn, NY
- Nomura SecuritiesTechnology Analyst2010 — 2012
- Raytheon Missile SystemsSenior Engineering Intern - Autopilot Division2009
- Corning IncElectrical Engineering Intern2008
- Campus DestinationsSoftware Architect2007 — 2008
Skills & more
OpenAI APIAnthropic ClaudeOpenAI CodexCursor AIReact NativeNext.jsReact.jsJava12Ruby on Rails2Amazon Web Services (AWS)1Ruby1SQL4
+12 more
PerlC++LinuxPythonCEclipseC#SubversionVBAGitJavaScriptjQueryFrom Peter's professional profile.
Frequently asked questions
- Who is Peter Greczner?
- Peter Greczner is CTO at Affinity. He has spent nearly 15 years working with early-stage companies in AdTech, FinTech, and Crypto, and was a founding engineer at Bread, where he led the engineering team prior to its $500M acquisition.
- Where does Peter Greczner work?
- Peter Greczner is Founder of Affinity.
- What companies did Peter Greczner found?
- Peter Greczner founded Affinity.
- Where did Peter Greczner go to school?
- Peter Greczner studied at Cornell University (Masters, Electrical and Computer Engineering); Cornell University (Bachelors of Science, Electrical and Computer Engineering).
Founder mafias
Y Combinator mafia8,773
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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
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Cornell University mafia218
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John ZimmerBSFounded Lyft +1Ian JanickiBachelors of ArchitectureFounded Outfit +2Ryan XueBachelor of Science (B.Sc.)Founded Andco +2Don MuirDyson School of BusinessFounded Arc +2Uri LopatinBAFounded Pardes Biosciences +1
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Rubicon Project mafia2
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Same school
Also attended Cornell University919
Doug LeonePartner at Sequoia Capital; former Global Managing PartnerJenny LeeSenior Managing Partner at Granite AsiaNeeraj AgrawalGeneral Partner at Battery VenturesJohn ZimmerCo-founder of LyftMichelle FernandesInvestor at Index VenturesMicah RosenbloomGeneral Partner at Founder Collective
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