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About
Zi Zhang previously led security infrastructure at Bloomberg and served as Head of Engineering at ACI.dev. He is currently Co-founder and CTO at Proximitty.
CTO at ProximittyYC W26
Intro paths
Zi went through Y Combinator (Winter 2026) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Diana Hu, General Partner at Y Combinator — the partner who ran Proximitty's batch and knows the company first-hand. YC profile ↗
In turn, Zi can intro founders to Proximitty's investors below.
Proximitty's investors · 12
Co-founders at Proximitty
Frequently asked questions
- Who is Zi Zhang?
- Zi Zhang previously led security infrastructure at Bloomberg and served as Head of Engineering at ACI.dev. He is currently Co-founder and CTO at Proximitty.
- Where does Zi Zhang work?
- Zi Zhang is CTO of Proximitty.
- What companies did Zi Zhang found?
- Zi Zhang founded Proximitty.
Founder mafias
Y Combinator mafia10,638
Also came through, then founded or led a company.
National University of Singapore mafia228
Also came through, then founded or led a company.
Huazhong University of Science and Technology mafia10
Also came through, then founded or led a company.
SPS Commerce mafia4
Also came through, then founded or led a company.
About this profile. Compiled from public sources — Proximitty's own website and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights