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Matheus Pissaia

@matheuspissaia

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I build high-performance Web3 and DeFi products across frontend, backend, and smart contracts.

Brazil

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What I'm looking for

I'm looking to build high-impact products where I can contribute across frontend and backend, improving code performance, and reliability.

I've built end-to-end Web3 and DeFi products, from wallet-connected frontends and smart contract integrations to scalable backend services and relational database design.

At DeFihub, I architected the frontend for a DeFi platform that processed more than $400K in deposits. I also optimized SQL queries and added server-side caching to reduce average API response time by 80%, while building unit and fuzz tests that caught critical smart contract vulnerabilities before deployment.

Before that, I’ve worked in a Web3 Portfolio Tracker, integrating 20+ DeFi protocols across 150+ tracked platforms and improving on-chain token-price services, reducing average latency by 50%. I also helped deliver a dedicated tracking experience for a protocol with over $200M TVL and a platform serving 100K+ monthly active users.

Experience

Work history, roles, and key accomplishments

Full Stack Engineer

DeFihub

Oct 2023 - Jan 2026 (2 years 3 months)

Architected the project's frontend from scratch, integrating Web3 wallet connections and smart contract interactions to power a DeFi platform that processed over $400K in deposit volume. Optimized complex SQL queries and implemented server-side response caching, reducing average API response time by 80%.

TypeScript NodeJS Vue.Js Nuxt Tailwind EthersJS AdonisJs MySQL Hardhat Solidity Sentry REST APIs

Full Stack Engineer

Web3 Portfolio Tracker

Feb 2022 - Jul 2023 (1 year 5 months)

Contributed to the continuous evolution of a portfolio tracker for Ethereum and other EVM-based blockchains by integrating over 20 DeFi protocols across 150+ tracked platforms. Refactored backend services responsible for computing on-chain token prices by fixing performance issues and reducing average latency by 50%.