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Jean-Loïc Mugnier
Verified Expert in Engineering
Blockchain Developer
Paris, France
Toptal member since October 7, 2022
Bio
Jean-Loïc is an ambitious, passionate French-Brazilian software engineer specializing in cybersecurity and cryptography. He has a background in computer science, an MBA in business management, and professional experience at Accenture, Binance, and BNB Chain, where he was the Web3 cybersecurity team lead and Cybersecurity Working Group coordinator at Campus Cyber and Niftag, a startup he founded.
Portfolio
IPSProtocol
Entrepreneurship, Ethereum Virtual Machine (EVM), Go, Ethereum Smart Contracts...
Binance
Web3, Smart Contracts, Auditing, Architecture, Go...
Binance
Auditing, Python, Smart Contracts, JavaScript, Blockchain...
Experience
- Back-end Development - 10 years
- Solidity - 8 years
- Agile - 7 years
- Software Engineering - 7 years
- Web Security - 5 years
- Distributed Ledger Technology (DLT) - 5 years
- Cloud - 4 years
- DevSecOps - 4 years
Work Experience
Founder
2023 - PRESENT
IPSProtocol
- Modified and improved the heart of Ethereum to enable smart contract and wallet hack prevention.
- Developed high-performance and advanced Blockchain explorer.
- Established a secure, resilient, scalable Cloud infrastructure for tens of customer-facing applications.
Technologies: Entrepreneurship, Ethereum Virtual Machine (EVM), Go, Ethereum Smart Contracts, Ethereum, Web3.js, Cryptocurrency, Smart Contracts, Back-end Development, Blockchain, Solidity, GitHub
Web3 Security Lead
2022 - PRESENT
Binance
- Crafted the Web3 security framework, akin to ISO standards, in collaboration with Web3 security experts like Certik, Slowmist, and Peckshield. These guidelines served as a unified basis for safeguarding all projects within the BNB Chain ecosystem.
- Initiated a weekly security scanning program to enhance the safety of all projects within the ecosystem by running weekly reports on the vulnerabilities detected and the best practices being followed.
- Oversaw the integration of the auditing team to adhere to the established standards.
- Developed a roadmap for tooling advancement, focusing on identifying newly detected vulnerabilities.
- Launched a cybersecurity initiative to disseminate knowledge and foster community awareness about cybersecurity threats and their corresponding solutions with BNB Chain cybersecurity partners.
- Harmonized roadmap and priorities with key management figures (BNB Chain leader and Binance CISO) despite divergent viewpoints.
Technologies: Web3, Smart Contracts, Auditing, Architecture, Go, Ethereum Virtual Machine (EVM), Ethereum, Web3.js, Cryptocurrency, Back-end Development, Blockchain, Ethereum Smart Contracts, Solidity, GitHub
Smart Contract Security Engineer
2022 - PRESENT
Binance
- Performed studies on historical hacks and vulnerabilities found in protocols.
- Conducted competitors analysis in terms of features and technologies.
- Developed on top of Slither, a static code analysis tool allowing us to detect vulnerabilities. Implemented newly discovered vulnerabilities from hack reports.
- Created new tools to scan all the BNB Chain projects above $200,000 in total value locked.
- Developed a tool for simulating transactions and protecting end users from scams.
- Created the 1st tool designed for conducting penetration testing on smart contracts.
- Participated in an AMA session to discuss cybersecurity for the BNB Chain.
Technologies: Auditing, Python, Smart Contracts, JavaScript, Blockchain, Non-fungible Tokens (NFT), Web3, Web Security, Hardhat, Git, DevSecOps, Solidity, Software Engineering, Agile Project Management, IT Project Management, Back-end Development, Architecture, Go, Ethereum Virtual Machine (EVM), Ethereum, Web3.js, Cryptocurrency, Ethereum Smart Contracts, GitHub
Working Group Coordinator
2021 - PRESENT
Campus Cyber
- Led the creation and writing of the Blockchain Catalog of Attack.
- Presented our work at the International Forum of Cybersecurity (FIC).
- Drove workshops for cybersecurity companies such as Orange Cybersecurity.
- Led my team in conducting a comprehensive analysis of smart contract threats and solutions, utilizing the ANSSI cybersecurity analysis framework.
- Coordinated a conference featuring industry leaders from both Web2 and Web3 sectors.
Technologies: Solidity, Git, Blockchain, Non-fungible Tokens (NFT), Web3, Project Management, Web Security, Hardhat, Architecture, Web3.js, Cryptocurrency, Smart Contracts, Back-end Development, Hyperledger, Ethereum Smart Contracts, GitHub
CTO | Founder
2021 - PRESENT
Niftag
- Developed our MVP application used to get our first clients.
- Defined the roadmap features based on clients' needs and interests.
- Created our recruiting strategy based on our roadmap.
- Pitched to venture capital (VC) and business angels (BA) investors on our long-term strategy to raise capital.
Technologies: Feature Roadmaps, Product Roadmaps, Budget Management, Recruiting, Software Engineering, Blockchain, Non-fungible Tokens (NFT), Web3, Web Security, Hardhat, Git, Linux, DevSecOps, Solidity, Agile Project Management, Back-end Development, Smart Contracts, Architecture, Amazon Web Services (AWS), Web3.js, Cryptocurrency, Ethereum Smart Contracts, GitHub
Learning Facilitator | Teaching Assistant
2023 - 2024
MIT Professionnal Education
- Prepared over 16 customized presentations for different classes to clarify course content developed by MIT professors.
- Created over 16 tailored courses based on participants' interests in Web3.
- Developed in-depth blockchain scenarios for over 20 use cases, with startup references for participants to explore.
Technologies: Blockchain, Ethereum, Crypto, Cryptography, Web3, Web3.js, Cryptocurrency, Smart Contracts, Back-end Development, GitHub
Senior Software Engineer
2017 - 2021
Accenture
- Delivered a public cloud migration program for the Amadeus department.
- Migrated a proprietary identity and access management (IAM) solution at Axa Go.
- Managed roadmaps, deliveries, and other internal assets.
Technologies: Java, Angular, DevOps, Cloud, Agile, Docker, Kubernetes, Project Management, Git, Linux, DevSecOps, Software Engineering, Agile Project Management, IT Project Management, Back-end Development, Architecture, Amazon Web Services (AWS), Go, Hardhat, Smart Contracts, Hyperledger, GitHub
Project History
Niftag
Niftag is a solution for authenticating physical goods with a simple smartphone tap. The solution relies on IoT devices installed in the products, a smartphone app, and an integration with blockchain NFTs. As the CTO and founder, I developed the project's tech stack.
SeatSwat
https://github.com/theexoticman/seatswap-ethglobal-cannes-25SeatSwap is a decentralized application that reimagines the flight ticket resale market. By leveraging Zero-Knowledge (ZK) proofs and representing tickets as NFTs, SeatSwap unlocks new liquidity for a traditionally illiquid asset. It enables a robust secondary market where tickets can be resold through various models, including auctions.
A key innovation of this model is its approach to privacy and compliance. NFT acquisition and resale on the secondary market can happen in a permissionless manner. Only the final ticket holder who intends to travel must provide their KYC data directly to the airline for redemption, dramatically reducing friction for traders and speculators.
This project was built for ETHGlobal, integrating a React front end, a Next.js back end for identity verification, and Solidity smart contracts for on-chain logic.
A key innovation of this model is its approach to privacy and compliance. NFT acquisition and resale on the secondary market can happen in a permissionless manner. Only the final ticket holder who intends to travel must provide their KYC data directly to the airline for redemption, dramatically reducing friction for traders and speculators.
This project was built for ETHGlobal, integrating a React front end, a Next.js back end for identity verification, and Solidity smart contracts for on-chain logic.
Education
2023 - 2024
Professional Degree in Blockchain
Massachusetts Institute of Technology (MIT) - Cambridge, MA, USA
2012 - 2017
Master's Degree in Computer Science Engineering
Polytechnique School of Nice - Nice - France
Certifications
JULY 2024 - PRESENT
Blockchain Certification
MIT Professional Education
Skills
Libraries/APIs
Web3.js, Web3j
Tools
GitHub, Git
Languages
Solidity, JavaScript, Java, Python, Go
Paradigms
DevOps, Agile, DevSecOps, Agile Project Management
Platforms
Ethereum, Blockchain, Linux, Docker, Kubernetes, Amazon Web Services (AWS), Hyperledger
Frameworks
Hardhat, Angular, Ionic
Industry Expertise
Project Management, Cybersecurity
Other
Cloud, Distributed Ledger Technology (DLT), Software Engineering, Smart Contracts, Back-end Development, Non-fungible Tokens (NFT), Web3, Ethereum Smart Contracts, Cryptocurrency, Web Security, Feature Roadmaps, Product Roadmaps, IT Project Management, Architecture, Ethereum Virtual Machine (EVM), Auditing, Budget Management, Recruiting, Cryptography, Blockchain Architecture, Applied Cryptography, Distributed Systems, Mathematics, Web Development, Entrepreneurship, Crypto, zeroknowledge
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