Freelancer profile translated to English.
Back to original languageAbout Sylvain
🎯 Java & Solidity Developer, I help blockchain startups design secure, scalable platforms compliant with regulatory requirements (PSAN, cold storage, smart contracts).
🎓 Graduated with a Master's in Computer Engineering and certified in DiGiTT Blockchain, I work on DeFi projects, tokenized digital assets (ERC-20 / stablecoins), and backend architecture (Spring Boot, Node.js, microservices).
✅ My latest missions: development of a compliant crypto exchange, secure smart contracts, simple UI for beginner and experienced investors.
⚙️ I bring a structured approach, oriented towards clean code, with a real taste for effective collaboration and well-designed products.
🚀 Available for blockchain / compliance / security back-end missions on scalable architecture.
Objective: deliver to you quickly, cleanly, and without technical debt.
French
Native or bilingual
English
Fluent
Spanish
Fluent
Remote only
Primarily works remotely
Experience
- CrypCoolBlockchain Developer | Java ExpertMay 2022 - April 2025 (2 years and 11 months)Bordeaux, France• Development of an intuitive platform for buying, selling, and managing crypto-assets• Creation of a simple and effective user interface, allowing beginners and experts alike to easily manage their crypto-assets (Bitcoin, Ethereum, VeraOne) without complex automation• Design and deployment of a secure web application, from specification to production• Complete architecture of a compliant platform (PSAN AMF), integrating cold storage and physical asset storage in Geneva vaults, from needs definition to launch• Implementation of innovative solutions for crypto-asset security and management• Setup of cold storage and regulatory compliance systems, ensuring asset protection against cyberattacks and user trust
- VeraOne.ioBlockchain Developer | Java ExpertMay 2022 - April 2025 (2 years and 11 months)Bordeaux, France• Implementation of advanced features to secure transactions and improve user experience• Design and deployment of ERC-compliant smart contracts for secure digital asset management• Optimization of performance and security of the existing web application
- Alyra, l'école blockchainBlockchain DeveloperOctober 2021 - January 2022 (3 months)• Ethereum & Bitcoin blockchain development• Design and deployment of high-performance Smart Contracts and DApps• In-depth Blockchain expertise: ERC-20, NFT tokens, stablecoins, and DeFi (Decentralized Finance)• Creation of an innovative DApp for real-time token organization and visualization, offering transparency and ease of use through a decentralized web interface and an integrated voting system• Development of a sophisticated DeFi DApp, including features such as: decentralized exchange, Swap, and token creation with assigned value (Mint)
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Education
- Blockchain DeveloperAlyra2022- Développement blockchain : Solidity, Truffle, Ganache, test unitaire - Conception et réalisation Dapps : React, Web3 - Expertise blockchain : ERC-20, token NFT, stablecoin, DeFi (finance décentralisée) - Gestion de projet technique
- Master 2 (M2), Computer EngineeringINSTA2020Master 2 (M2), Ingénierie informatiqueMaster 2 (M2), Ingénierie informatique 2018 - 20202018 - 2020 La formation vise l’acquisition d’une compétence pointue dans le domaine du développement logiciel, web, applications mobiles, intelligence artificielle, big data, ainsi qu'un savoir-faire avancé en terme de conception objet, de modélisation et de définition d’architectures sophistiquées. Sujets : Programmation avancée avec Java, Big Data, L’intelligence artificielle, Business Intelligence, Développement Mobile sous Android et IOS, Python et le Framework Django, Sécurité web, Dév. Web, Front-End avec Node JS, Dév. Web, Back-End, Frameworks Laravel, Angular JS, Ruby On Rails, SQL server, T. SQL : Conception et réalisation d’une Base de données, Modélisation avancée avec UML, Analyse & communication Projet de fin d'études (mémoire) d'envergure portant sur une problématique d'entreprise : "Mise en œuvre des microservices, de la théorie à la pratique"