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Raphael SerfatyRS

Raphael Serfaty

CTO // AppSec Auditor and Blockchain Expert

€1,000/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Raphael

Passionate about blockchain technology and hacking techniques since 2016, I help companies to:

🥷🏼 Secure their "web2" and "web3" applications (Smart contract and web application security audit),

🕵🏻‍♂️ Prepare the launch of web3 projects in advance and downstream (NFT staking platform, minting site, utility and loyalty platform, etc.), thus fulfilling the CTO role,

💻 Develop and deploy custom smart contracts on any EVM-compatible blockchain (Ethereum, Polygon, BSC, Arbitrum, Fantom..) with web3 integration on the client's site or by developing the site myself.

🎓 Train their developers and collaborators:

· on various IT attack techniques
· on various blockchain tools and technologies

I invite you to review my past experiences to get a more precise idea of the technical support I can provide,

Looking forward to collaborating with you 🚀
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Conversational

Can work on-site
Paris (up to 50km)

Experience

  • Panthéon Business club
    CTO // Application Security, Blockchain Expert, Web3 & NFT Trainer
    EDUCATION AND E-LEARNING
    December 2021 - Today (4 years and 6 months)
    Paris, France
    Creation of the largest French entrepreneur network.

    - Creation of NFT Cards granting access to a club (ERC721 Smart Contract)
    - Creation of Thank You NFT Cards (ERC1155)
    - A private training platform (Use of web3 APIs)
    - Authentication to the platform via NFT

    ➡️ More information at: https://www.pantheonbusinessclub.com/ 🚀
    Blockchain Ethereum Solidity Node.js Bubble.io API NFT Training Mentoring
  • Owanted.io
    Web3 Expert: Consulting, Development, and Smart Contract Security Audits (NFT)
    CONSULTING AND AUDITS
    September 2021 - Today (4 years and 9 months)
    Paris, France
    ✅ Co-founder of 2 NFT collections generating over €1.2 million in revenue in 7 months.
    ✅ Supported several companies in launching their collections.

    🔐 Development of Smart Contracts (ERC721, ERC1155, ERC721-A), following the latest gas fee optimization standards on Ethereum.
    🔗 Deployment on all EVM-compatible blockchains (Polygon, Binance Smart Chain, Fantom, Arbitrum, etc.).
    🛡 External smart contract security audits.
    💻 Writing NodeJs scripts for creating NFTs and Metadata (Fully customizable).
    ⛓ Blockchain management of minting + decentralized NFT storage management via IPFS.
    💻 Development of no-code websites and web applications + creation of NodeJS plugins.
    🌐 Use of APIs and libraries for data analysis and payment/escrow management (Opensea, Looksrare, swikly, web3js, web3 modal, etc.).
    🪪 Integration of Metamask and WalletConnect connections.
    🛡 Web application security audits (Front End, Back End, API, etc.).

    ➡️ Visit https://www.owanted.io/web3 to learn more 🚀
    Security Audit Ethereum solidity Smart Contract
  • Sopra Banking Software
    Application Security Consultant
    BANKING AND INSURANCE
    November 2019 - May 2022 (2 years and 7 months)
    Paris, France
    🕵🏻‍♂️ Auditor of banking web applications (12 banking applications audited): dynamic web application testing via ZAP (DAST), source code static testing via Checkmarx (SAST), code review, interactive testing via Checkmarx (Cx IAST).
    🕵🏻‍♂️ Monitoring application security, continuous improvement of the application security integration strategy in projects: development standards, tools, audit methodology, training materials for managers, architects, and developers, cross-functional support for group entities.
    🎓 Trainer at Sopra Steria Academy on Information Security (PSI strategy, best practices reminder, PAS, PCA, presentation of standards and regulations) and Secure Development (OWASP, development standards, attack techniques, and protection measures).
    🛡 Monitoring best practices and regulations. Impact analysis and adaptation of project practices (Solution Building, Solution Acceptance, Quality Assurance, Security Tests Plan).
    🛡 Project management and implementation of new product security processes.
    OWASP Burp Suite Checkmarx SAST & IAST DAST Security Audit Trainer Project Management Agile Methodology

Recommendations

Matéo ReyMR
FU
Guillaume DuttiGD
+3
Matéo Rey and 5 other people have recommended Raphael

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Education

  • Engineering Degree in Computer Security
    CY TECH - formerly EISTI
    2019
    • Gouvernance de sécurité système (Mise en norme RGPD, Conseil de sécurité...) • Kali linux (OWASP, Metasploit, WireShark...) • Test d’intrusion, • Gestion de projet (Méthode Scrum, Agile • Programmation Système et Réseau, • Algorithmique & Machine learning (Algorithme de A*, ), • C++, • Pascal (création d'un jeux de battleship sur l'invite de commande), • Ocaml (Google code jam test) • Python Web, • J2EE (Hibernate, Spring) (Projet web questionnaire + projet de gestion de calendrier)
  • Bachelor's Degree, Computer Science
    University of Cergy-Pontoise
    2017
    Double diplôme : Prépa + Licence, Informatique

Skill set

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