zero-knowledge cryptography · defi
June
Zero-Knowledge & DeFi Engineer · Taipei
I publish open-source Circom circuits — including the first to support 128/192/256-bit AES-GCM and a Keccak-256 circuit at the theoretical-minimum constraint count — and ship DeFi products end-to-end, from on-chain logic to frontend.
about
A cryptographer who ships.
I'm June. My work sits where zero-knowledge cryptography meets production DeFi: proving statements without leaking witnesses, then turning those proofs into protocols people actually use. I published 30+ open-source Circom circuits, ran ZKP masterclasses from theory to Groth16, and have owned DeFi products end-to-end — on-chain indexing, state transitions, frontend, and keepers.
- Circom
- Groth16
- Solidity / Foundry
- Sui Move
- zkVM
- Go
My proudest build — a live protocol for privacy-preserving finance on Sui. Shield, transfer, and swap assets confidentially with ZK-SNARKs, Merkle trees, and Poseidon. sui-octopus.com ↗
First Circom circuit to support 128/192/256-bit AES-GCM.
keccak256-circomKeccak-256 circuit at the theoretical-minimum constraint count.
zkWillZero-knowledge circuits for verifiable, privacy-preserving digital inheritance — my thesis work.
Invoice-RWA 🏆 RWA TaiwanSecure invoice lottery on Zircuit, using ROFL (TEE) to guarantee result authenticity and integrity.
payLock 🏆 HOH BestSui SDK for secure paid-data unlocking, built on Walrus and Seal.
deepbook-predict-cliCLI / TUI for Sui DeepBook Predict (binary options), with a 13-slide technical brief. Published on npm.
experience
Where I've built.
-
Sui Full-Stack Engineer
Undisclosed · DeFi on Sui Feb 2026 — Present · Hybrid / Taipei- Owned two DeFi products end-to-end in three weeks — the LP module of a Peer-to-Pool perp DEX and a prediction market — across on-chain indexing, business logic & state transitions, frontend, and automated keeper scheduling.
- Implemented signless transactions on the perp DEX to remove signing friction and reduce slippage-driven drop-offs, hardened with CSP headers against XSS.
- Caught a critical vulnerability introduced by an internal SDK update — escalated and remediated it before any exploit, preventing potential wallet compromise.
-
ZK Principal Engineer contract
Twin3 Dec 2025 — Feb 2026 · Remote- Led the design of a scalable proving service on GCP for 10,000+ users, using Brevis Pico (zkVM) to validate Human Index integrity without compromising user privacy.
-
Golang Backend Engineer
Aurora Tech Mar 2022 — Jan 2023 · Onsite / Taipei- Built a CFD trading platform with Gin, GORM, and Kafka; deployed via Docker/K8s with 80%+ unit and integration test coverage.
writing
Selected writing.
hackathons
Wins from the field.
-
Best Project — Changsha HOH Hacker House Paylock · solo · Sui SDK on Walrus + Seal · Mar 2026
-
Sui Track — Vibe Sui Spring Fest 2026 Octopus · decentralized privacy protocol on Sui · Feb–Mar 2026
-
Oasis & Zircuit Tracks — RWA Hackathon Taiwan Invoice-RWA · team tech lead · Oct 2025
-
Circle & Autopass Tracks — ETHGlobal / Walrus Haulout ETHTaipei 2023–2025 · ETHGlobal 2024–2026 · Walrus Haulout 2025
education
Credentials.
-
National Yang Ming Chiao Tung University (NYCU)
M.S. Computer Science
Mar 2023 — Jan 2026Thesis: “Linking Eternity: A Blockchain-Based Framework for Verifiable and Privacy-Preserving Digital Inheritance.” Published 30+ open-source Circom circuits and ran ZKP masterclasses from theory to Groth16.
-
National Taiwan University (NTU)
B.S. Public Health
Sep 2013 — Jun 2017