Jose Luis Imoberdorf

**Presale** is a Solidity smart contract that runs a phased token sale. Buyers can purchase the sale token using **USDT**, **USDC**, or native **ETH**, with the ETH price sourced live from a **Chainlink-compatible price feed**.

SwapApp is a DeFi smart contract built on Solidity that integrates with a Uniswap V2 compatible protocol on Arbitrum. The application provides a unified interface for token swaps, liquidity provisioning, and liquidity withdrawal operations using USDT and DAI.

A Solidity staking application in which users lock a fixed amount of an ERC-20 token and periodically claim a fixed native-currency reward.

A lightweight Solidity smart contract for ERC-20 token swaps through a Uniswap V2-compatible router, tested with Foundry against a fork of Arbitrum.

A Solidity-based NFT marketplace built with Foundry and OpenZeppelin. The marketplace allows ERC-721 owners to list NFTs for sale, buyers to purchase listed NFTs with native ETH, sellers to cancel active listings, and the contract deployer to manage a protocol fee within a fixed maximum.

A limited-supply ERC-721 collection for car-themed NFTs, built with Solidity, OpenZeppelin Contracts, and Foundry. The contract is deployed and source-verified on Arbitrum Sepolia, while NFT metadata and media are published through IPFS using Pinata.