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Blockchain · Privacy · Open Hardware · Applied Cryptography · AI Agents
Data Scientist, builder, CTO & AI engineer from Cancún, México 🇲🇽 — shipping hardware wallets, private wallets and on-chain agents.
$ whoami
0xoucan — Data Scientist, CTO & AI engineer at the intersection of
Ethereum, privacy, embedded hardware and AI-assisted development.
$ cat focus.txt
→ open-source hardware wallets on ESP32-S3
→ air-gapped QR signing (EIP-4527 / BC-UR)
→ AI agents that execute on-chain
→ developer tooling for EVVM and EIP researchIn crypto since 2017, DeFi since 2020. I like taking an idea from problem → research → prototype → hardware / software → tested product → open-source docs, usually on a hackathon clock. Before I wrote code I taught languages and designed courses, so I write repos that a newcomer can actually follow.
I run FlashTalk Cotorreo 🍻 — 2-minute flash talks on any blockchain topic, with beers, food, cotorreo y desmadre.
🥬 LeekWallet — build your own hardware wallet
lek — a Yucatec Maya gourd container, made to protect what's inside it. 🥇 ETHapps Guild Hackathon — 1st place, Hardware track · ETHGlobal 2026 Finalist
Open-source hardware wallet firmware for the ESP32-S3 and Firefly Pixie. The device decodes calldata itself and refuses to sign anything it can't show you in full.
┌───────── companion (NOT trusted) ──────────┐ ┌───────────── device (trusted) ─────────────┐
│ dapp / WalletConnect → ERC-7730 preview │──tx──▶ │ own decoder → one page per field │
│ Tauri desktop · Android · MV3 extension │◀─sig── │ seed never leaves · signs as shown │
└────────────────────────────────────────────┘ └────────────────────────────────────────────┘
USB CDC · BLE GATT · animated QR (EIP-4527, no cable, no radio)
BIP-39/32/44 · secp256k1 RFC6979 · AES-256-GCM vault · X25519 + ChaCha20-Poly1305 sessions · dice + HW RNG entropy · EIP-1559 · EIP-6963 · reproducible builds · Apache-2.0
| Date | Event | Result | Project | Role |
|---|---|---|---|---|
| Oct 2026 | ETHapps Guild Hackathon | 🥇 1st — Hardware | LeekWallet | CTO · AI engineer |
| Sep 2026 | ETHGlobal | 🏅 Finalist | LeekWallet | CTO · AI engineer |
| Jun 2026 | Fhenix Buildathon | 🥇 Best Consumer App | Z0tz | CTO · AI / ZK engineer |
| Oct 2025 | ETHGlobal | 🎣 Best Use of Fishers | PAYVVM | CTO · AI engineer |
| Aug 2025 | Monad Mobil3 | 🥉 3rd — DeFi | ACAL | CTO · AI engineer |
| Jul 2025 | NapulETH | 🥇 1st — MVP | StuCredi | CTO · AI engineer |
| Jul 2025 | Mantle Hackathon | 🥇 1st place | MictlAI: Mantle Quest | CTO · AI engineer |
| May 2025 | ETH Cinco de Mayo | 🚀 MVP | MictlAI | CTO · AI engineer |
| May 2025 | Celo Proof of Shipping | 🥈 2nd — Best AI Agent | CeloMΔIND | CTO · AI engineer |
| Apr 2025 | Agent Camp | 🥈 2nd — Best AI Agent | Agent XOC | CTO · AI engineer |
| Mar 2025 | ETHGlobal Trifecta | 🥇 1st — Coinbase AgentKit | ModerIA | AI / back-end engineer |
| Mar 2025 | =nil; Foundation | 🥈 2nd — Best AI Agent | nilAIagent | AI engineer |
| Nov 2024 | ETHGlobal | 🔀 Built | MICTA — private cross-chain orderbook bridge | Project manager |
Previously — EVVM (a.k.a. Rollamate): AI engineer, creator of EVVM EIP Lab (turns any EIP into documented Solidity), creator of Scaffold-EVVM, LLM-ready docs scraper and documentation maintainer.
| Blockchain | Ethereum · Base · Arbitrum · Monad · Mantle · Celo · Oasis Sapphire · Fhenix CoFHE · Hardhat · Foundry · viem · wagmi · ethers.js · Scaffold-ETH · OpenZeppelin |
| Standards | ERC-4337 · EIP-1559 · EIP-4527 · EIP-6963 · ERC-7730 · ERC-5564 / 6538 · WebAuthn · WalletConnect v2 |
| Protocols | Circle CCTP · Hyperlane · CoW Protocol · Uniswap v4 hooks · Aave · Chainlink · 0x · MetaMask Delegation · Envio |
| Crypto | BIP-39/32/44 · secp256k1 · P-256 · AES-256-GCM · ChaCha20-Poly1305 · X25519 · PBKDF2 · FHE |
| Embedded | ESP32-S3 · ESP-IDF · PlatformIO · I²C / SPI · USB · BLE · OLED / TFT · OV5640 · QR decoding |
| AI | Coinbase AgentKit · Nebula · multi-agent coding workflows · BYO-key LLM tooling |
- 🎮 Xbox → Switch adapter — ESP32-S3 box with OLED menu: Xbox controller in over BLE, Switch Pro Controller out over USB.
- 🥽 DIY FPV goggles — ESP32-S3 + dual ST7735S displays + Google Cardboard, streams your PC over USB-C at ~25 FPS for FPV simulators.
test ──▶ fail ──▶ inspect ──▶ understand ──▶ change ──┐
▲ │
└───────────────────────────────────────────────────┘
- Build first — a working prototype teaches more than a long debate.
- Privacy is architecture — hardware, storage, identity, telemetry, UX — from day one.
- Hardware should be accessible — commodity parts, open firmware, reproducible builds.
- AI speeds up the loop, it doesn't replace the engineering.
Open to collaborate on: wallet infrastructure · account abstraction · applied cryptography · open hardware · AI agents · security research.
~ could we build this differently? ~