Sami Bouchnafa

🔗 Built a Blockchain Stock Market Trading System Developed a complete stock market ecosystem using Hyperledger Fabric with multi-organization network including exchanges, brokers, clearing houses, and regulatory authorities. Key Features: ► Smart contracts for order matching, settlement & compliance ► Real-time trading engine with automated order execution ► Multi-channel architecture for trading and settlement workflows ► Full-stack web interfaces for market operations Tech Stack: Hyperledger Fabric, JavaScript, Node.js, React, Docker, Smart Contracts

As a Blockchain Security Intern at Shellboxes, I worked on developing advanced tools and challenges aimed at enhancing blockchain security awareness and detection of potential vulnerabilities. Designed and implemented Blockchain CTF challenges, including scenarios based on Denial of Service (DoS) attacks and oracle manipulation, using Solidity and the Foundry framework. Developed a Python application to monitor the mempool for newly launched ERC20 tokens on EVM-based blockchains, with automated testing to identify potential scams and malicious contracts before purchase. Built an automated analysis bot leveraging Slither for static analysis of smart contracts, gathering intelligence from Ethereum and Layer 2 networks like Optimism and Polygon. Technologies used: Solidity, Foundry, Python, Anvil, Ethereum APIs, web3.py, Slither.