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Zac Policzer

Founder

Founder and CTO at Zibra Labs

San Francisco Bay Area

FoundedZibra Labs · YC

Find your path to Zac

531 people in our graph share verified history with Zac — schools, employers, funds. One of them is your warm intro.

Javier SolterounlockedZac: together at VMware (2012)
×2Zac: together at UCLA
×4Zac: together at VMware
×3Zac: together at Anyscale

About

Zac Policzer previously worked on software systems serving over a billion users with expertise in large-scale databases. He is now developing high-performance computing clusters at Zibra Labs, with recent focus on AI data center infrastructure and open source contributions.

Founder and CTO at Zibra LabsYC X26

Intro paths

YC

Zac went through Y Combinator (Spring 2026) — any YC alum in your network can reach them through the YC community.

GP

Their group partner at YC was Tom Blomfield, Monzo and GoCardless co-founder; Y Combinator partner on leave and Anthropic compute-team member. — the partner who ran Zibra Labs's batch and knows the company first-hand. YC profile ↗

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In turn, Zac can intro founders to Zibra Labs's investors below.

Zibra Labs's investors · 2

HOF CapitalNew York · $25K – $15M checksY CombinatorSan Francisco · $500K checks · since 2026

Co-founders at Zibra Labs

IRIbrahim Rabbani
Ibrahim RabbaniFounder and CEO

Experience

  1. Zibra LabsCofounder and CTOcurrent2026 — presentSan Francisco
  2. AnyscaleEngineer2025 — 2026San Francisco Bay Area
  3. LinkedInSenior Staff Software Engineer2022 — 2025San Francisco Bay Area
  4. LinkedInStaff Software Engineer2014 — 2022San Francisco Bay Area
  5. LinkedInSenior Software Engineer2016 — 2018
  6. LinkedInSoftware Engineer2014 — 2016
  7. Zac Squared ChocolateCofounder2015 — 2022San Francisco Bay Area
  8. VMwareSoftware Engineer2013 — 2014Palo Alto, CA
  9. VMwareIntern2012
  10. Zynx HealthIntern2011 — 2012
  11. UCLA Department of MedicineComputer Administration2009 — 2012

Skills & more

Technology LeadershipC SuiteFormal MethodsSoftware Systems EngineeringSoftware DesignStream ProcessingRay Frameworkfeature storeai infraJava8JavaScript6Python8
+12 moreGitAgile MethodologiesC#LinuxC++FPGAMongoDBSQLHTMLRubyJenkinsBash
  • Stanford Advanced Computer Security — Stanford University

From Zac's professional profile.

Frequently asked questions

Who is Zac Policzer?
Zac Policzer previously worked on software systems serving over a billion users with expertise in large-scale databases. He is now developing high-performance computing clusters at Zibra Labs, with recent focus on AI data center infrastructure and open source contributions.
Where does Zac Policzer work?
Zac Policzer is Founder and CTO of Zibra Labs.
What companies did Zac Policzer found?
Zac Policzer founded Zibra Labs.
Where did Zac Policzer go to school?
Zac Policzer studied at UCLA (Bachelor of Science (B.S.), Computer Science).

Founder mafias

Same school

Shared employers