LETICIA AZEVEDO

I write code that protects money Web3 Solidity Developer

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Explore my

Projects

πŸ† Hackathon Winner
LockFi

A security vault that holds suspicious withdrawals in a cancellable queue before execution, it catches drain attempts and large transfers before it's too late. Your crypto, protected.

MONAD HACKATON SOLIDITY
Watchdog

AI agents can now hold wallets and spend autonomously. Watchdog is the smart contract that enforces spending limits and prevents unauthorized payments before they land onchain.

x402 Stellar AI Infra
Human Bond

Two World ID verified humans, one ZK-onchain bond. Users earn TIME token as daily yield and unlock milestone NFTs as proof of relationship.

Miniapp World ID Solidity
AZD Stablecoin

A dex stablecoin backed by ETH and BTC, where users deposit collateral to mint AZD. The protocol maintains solvency through health-factor checks and liquidation logic.

Solidity/foundry React/Next.js
Web3 Raffle

A decentralized raffle that runs itself. Solidity smart contracts handle entry and payouts, Chainlink VRF guarantees the draw is fair.

Solidity Foundry React.js
Blockchain Finder

Built in 2023 while working as a Transaction Auditor at Binance. Paste any txID or deposit address and get the correct network instantly.

Frontend React/Next.js
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Get To Know

About Me

2021-2023 β€” Binance

Transaction Auditor

Spent two years watching money disappear onchain, failed deposits, scams patterns. Auditing real transactions at scale taught me exactly how onchain systems fail.

2024 β€” OKX

Senior Crypto Support

Deepened my understanding of wallet infrastructure, cross-chain behavior, and what happens when users interact with systems that weren't built with them in mind.

2024 β€” First Smart Contract deployed

Started building in Solidity

Decided to build the systems instead of watching them break.

2025 β€” Smart Contract Developer

Three protocols, one year

Deployed a Chainlink-integrated raffle, an overcollateralized stablecoin with liquidation logic, and an identity protocol on World Chain mainnet.

2026 β€” Monad Hackathon

πŸ† 1st place with LockFi

Built a security vault that catches suspicious withdrawals before they execute. Everything I learned watching money get stolen went into this project.

Now

Building security infrastructure for onchain systems

Based in Brazil, building globally. When I'm not at the terminal, you'll find on the beach or playing tennis.