killianguerin

As a self-taught Full-Stack & Blockchain Developer, I design, develop, and deploy secure and scalable decentralized applications (DApps) leveraging React, Next.js, Node.js, and Solidity. My responsibilities include building and maintaining smart contracts, integrating blockchain logic into front-end systems via Web3.js / Ethers.js, and ensuring a seamless user experience across decentralized platforms. I handle both front-end and back-end architecture, manage APIs (REST / GraphQL), and implement authentication, security layers, and CI/CD pipelines to guarantee reliability and performance. On the blockchain side, I work on DeFi-related projects, focusing on token interactions, contract testing (Hardhat / Foundry), and smart contract auditing practices to enhance security and efficiency. I also maintain a strong focus on cybersecurity, continuously improving my penetration testing and system hardening skills through platforms like HackTheBox (78%, global rank #740). Beyond development, I stay engaged in the Web3 community, contribute to open-source projects, and experiment with Solana, Layer 2 solutions, and Zero-Knowledge technologies.