Hi there 👋 my name is Juan and these are my Blockchain contributions:

Personal Projects ⛰️

• Starknet Sport Pool (under construction): A mobile phone sports prediction app where you, your friends and family will have a lot of fun betting in funny and personal sports leagues.

Hackathons 🏆

• HackerEarth'20 (on site): A Python automated credit risk score (Python).
• Starknet Hacker House San Francisco'23 (on site): 5th place with Starknet Homepage (and NFT ads minter) (NextJS, Cairo).
• Starknet Re{ignite}'25 (remote): With Starknet Sports Pool (Dart, Cairo).
• Starknet Re{solve}'25 (remote): With ZK_PES the Extransensory Perception Game (Dart, Cairo, Circom, Mopro).

Internships and Training Attendance 💪

• Nethermind Internship (3 months)
• Advanced Cairo and ZK Proofs (@extropy)
• Advanced Solidity: Yul and Assembly
• Ethereum Solidity Course
• Mining Rig Building
• Crypto Trading
• Blockchain University Diplomate

Main Contributions 👷

• Damn Vulnerable Defi with Foundry (Writeup).
• Secureum A-Maze-X Defi CTF (Writeup).
• Starknet Book Security Chapter (Smart Contract Security Best Practices).
• Kakarot (A Setup fix).
• Starknet Security Challenges (Upgrade and Challenges Integration).
• Starknet Foundry (Delete account feature).
• Starknet.Dart (SNIP upgrades and AVNU Paymaster Integration).

Smart contract CTFs Completed 🏴‍☠️

• Secureum Defi A-Maze-X.
• Damn Vulnerable Defi with Foundry.
• Ethernaut.
• CaptureTheEther.
• Starknet Security Challenges (in Cairo).

Starknet Dev Challenges Completed ⛰️

• Starknet Messaging Bridge (in Cairo 0).
• Starknet-Cairo-101 (in Cairo 0).
• Starknet-ERC20 (in Cairo 0).
• Starknet-ERC721 (in Cairo 0).
• Starknet-Account Abstraction.
• Nodeguardians (just Thinking in Cairo).

Ethereum Web3 Dapps (on testnet) 🕸️

• DAO w/ERC1155 published in UniswapV3(link)

Solana Web3 Dapps (on devnet) 📫

• Solana Gif Account Records(link)
• Solana NFT Drop(link)

Bootcamps/Workshops Attendance 🎓

• Starknet Basecamp (cohort 2)
• Solana Smart Contracts Intro
• ZK rollups, Introduction to Cairo and Starknet
• Defi Programming Introduction
• Smart Contracts Hacking Introduction
• Blockchain Programming Introduction