Tomás Araújo

<h3 align="center"> Smart Contract & Web3 Backend Developer (Solidity • Rust • Indexers) </h3>

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Focus

Designing and implementing smart contract systems with supporting off-chain infrastructure (indexers, APIs, event pipelines), focusing on correctness, security, and state consistency.

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Areas of Work

• Smart contracts in Solidity (EVM)
• Rust programs for Solana
• Event-driven on-chain/off-chain systems
• Web3 backends / indexers for contract interaction
• Design of protocol primitives (vaults, staking, lending patterns)

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Projects

Vault Indexer (TypeScript + PostgreSQL)

• Event-driven indexer for tracking deposits and withdrawals
• Handles chain reorgs and maintains consistent state
• Exposes REST API for querying indexed data

ERC-20 + Staking Contract (Solidity)

• Token implementation with staking mechanism
• Time-based reward distribution logic
• Tested with Foundry (unit + fuzz testing)

Solana Program (Rust)

• Basic stateful program using Solana account model
• Instruction handling and state transitions
• Focus on understanding low-level architecture

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Currently Building

• Vault + Indexer system (EVM)
• Exploring Solana program architecture in Rust

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Stack

Blockchain
Solidity • EVM • Rust • Solana • Foundry / Hardhat

Backend / Off-chain
Node.js • TypeScript • ethers.js / web3.js

Infra / DevOps
Docker • Linux • Git

Data
PostgreSQL

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Contact

<p align="center"> <img src="https://komarev.com/ghpvc/?username=psatomas&color=0A66C2&style=for-the-badge" alt="Profile views" /> </p>