Yosra Helal
Senior Blockchain Architect | Smart Contracts
Salaire / Taux journalier
Paris, France
Freelance, ouvert au CDI
À distance uniquement
Expertises
Langues
À propos
Introduction
Blockchain Architect at Banque de France with 6+ years developing smart contracts and leading technical teams. Delivered high-profile NFT drops for L'Oréal brands and optimized contracts for major financial institutions. Specialized in Solidity, Layer2 solutions, and DeFi architecture to transform your blockchain vision into reality.
Expérience de travail
Blockchain Architect and developer
Banque de FranceFreelance
nov. 2023 - Présent
3 ans
Paris, France
• Smart contract optimization, review, audit and development • Evaluate the new platforms and technologies • Project architecture and conception • Blockchain technical consulting • Technical team management • Deployment and customization of rollup chains using CDK (Polygon) and zkStack, including network creation and monitoring. • Private smart contracts development with on the EVM using Fully Homomorphic Encryption (FHE) (Zama)
CTO associate
UNBLOCKED
sept. 2021 - Présent
5 ans 2 mois
Paris, France
• Build and lead the technical team (team of 6 developers) • Develop and maintain the client project development • Smart contract optimization, review, audit and development • Evaluate the new platforms and technologies • Collaboration with the marketing and communication team • Project architecture and conception • Blockchain technical consulting • Technical team management • Development and deployment of LaCoste smart contract "drop UNDW3 Lacoste" Link to the smart contract deployed https://etherscan.io/token/0xcD041F40d497038E2da65988b7D7e2C0D9244619 • Technical stack: solidity, hardhat, EVM compatible blockchain, ipfs, nodeJs, reactJs, Typescript, ethersJS
Lead solidity dev
TOKEN ERUFreelance
sept. 2021 - oct. 2024
3 ans 2 mois
Paris, France
Smart contract development and testing of ERU Token https://bscscan.com/token/0x8dc103496018de1002a0a4b324e6239620e73dd5 https://token-eru.com
Blockchain Lead
Aura Blockchain ConsortiumFreelance
avr. 2023 - juil. 2023
4 mois
Paris, France
Blockchain Lead
L'OréalFreelance
juil. 2022 - juil. 2023
1 an 1 mois
Paris, France
- MUGLER official NFT drop - YSL official NFT drop - GORJS official NFT drop - Blockchain consulting and training
Blockchain Advisor
Metaleon SocietyFreelance
mars 2022 - déc. 2022
10 mois
Lead Dev Blockchain and Auditor
AllianceBlockFreelance
oct. 2021 - déc. 2022
1 an 3 mois
Blockchain Engineer
StackticalFreelance
sept. 2018 - déc. 2022
4 ans 4 mois
Région de Paris, France
Stacktical helps online providers improve the reliability of their services and automatically compensate customers for slowdowns, downtimes and unresponsive customer support. • Ensuring the flawless execution of Stacktical’s collection of smart contract. • Developing smart contracts for ICOs, leading the full cycle through coding, writing, testing and auditing.
Blockchain Professor and content creator
Alyra, l'école blockchain
oct. 2019 - août 2021
1 an 11 mois
Paris Area, France
Blockchain Developer
Blockchain Partner
nov. 2018 - oct. 2019
1 an
Région de Paris, France
- Application development : mainly Go & nodeJs. - Development of smart contract in solidity. - Audit of smart contracts. - Technical Projects analysis and due diligence's report. - Participate to the definition of the technical solution. - Participate to the definition of the detailed use cases and user interface. Setup of an Ethereum node. - Application deployment. - Technical documentation. - Main clients: Banque de France, Orange, Haute-Savoie habitat, Mont Hennessy du Groupe LVMH ... - Main product: TIM
Formation
Université Paris Dauphine - PSL
Master Professionnel MIAGE-IF « Informatique pour la Finance »
2015 - 2016
2 ans
ISG Institut Supérieur de Gestion
Licence fondamentale
2011 - 2014
4 ans
Ecole Supérieure Privée d'Ingénierie et de Technologies - ESPRIT
Diplôme d'ingénieur