Dekai Li
Updated 25 Aug 2026
I'm building Trident to break into your app before somebody else does.
I'm the acting CTO and cofounder. Trident runs real authenticated pentests against a live web app, then hands back each finding with the file, the line, and a patch — not a PDF nobody reads.
We're part of Y Combinator's S26 batch.
Before this I built AI products, startup systems, and fast software teams — mostly the unglamorous parts underneath: the pipelines, the eval harnesses, the deploys nobody wants to own.
Software
What I've shipped.
- Live Trident — pentests that run against your live app Site
- Shipped RevisionDojo — IB & MYP exam prep iOS
Articles
Nothing published yet.
Career
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Co-Founder & CTO
Trident
Feb 2026 – Present · 7 mos · San Francisco Bay Area
We hack your cloud and your agents, then observe and fix what breaks. Backed by Y Combinator and Cory Levy (ZFellows).
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Software Engineer
RevisionDojo (YC F24) · Internship
Oct 2025 – Jan 2026 · 4 mos · New York · Remote
Built the mobile infrastructure and a RAG system from scratch.
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Researcher
University of Toronto
Jul 2025 – Oct 2025 · 4 mos · Toronto, Ontario · On-site
Elsewhere
You can find me on GitHub, X, and LinkedIn, or reach me over email.