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Hi, I’m Sylvain. I’m a blockchain specialist with strong expertise in Solidity smart contracts, decentralized applications, and protocol design. I’m the founder of multiple blockchain startups and experienced in multi-chain architecture. I’m passionate about building secure, scalable blockchain systems, leading teams, and delivering innovative Web3 products that balance security with practical user experiences.…Hi, I’m Sylvain. I’m a blockchain specialist with strong expertise in Solidity smart contracts, decentralized applications, and protocol design. I’m the founder of multiple blockchain startups and experienced in multi-chain architecture. I’m passionate about building secure, scalable blockchain systems, leading teams, and delivering innovative Web3 products that balance security with practical user experiences.

Sylvain Berthelot

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Hi, I’m Sylvain. I’m a blockchain specialist with strong expertise in Solidity smart contracts, decentralized applications, and protocol design. I’m the founder of multiple blockchain startups and experienced in multi-chain architecture. I’m passionate about building secure, scalable blockchain systems, leading teams, and delivering innovative Web3 products that balance security with practical user experiences.…Hi, I’m Sylvain. I’m a blockchain specialist with strong expertise in Solidity smart contracts, decentralized applications, and protocol design. I’m the founder of multiple blockchain startups and experienced in multi-chain architecture. I’m passionate about building secure, scalable blockchain systems, leading teams, and delivering innovative Web3 products that balance security with practical user experiences.

Available to hire

Hi, I’m Sylvain. I’m a blockchain specialist with strong expertise in Solidity smart contracts, decentralized applications, and protocol design. I’m the founder of multiple blockchain startups and experienced in multi-chain architecture.

I’m passionate about building secure, scalable blockchain systems, leading teams, and delivering innovative Web3 products that balance security with practical user experiences.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

French

Fluent

English

Advanced

Work Experience

Lead Smart Contract Engineer at Brightstarter

January 1, 2023 - November 20, 2025

Design and maintenance of a multi-chain launch pad protocol; implementation of staking, vesting, and token sale mechanics; security audits and continuous optimization of contract performance.

Founder & Lead Developer at BandZai Game

January 1, 2022 - November 20, 2025

Created a Web3 strategy video game integrating NFTs and DeFi mechanics; managed blockchain architecture, game token economics, and user authentication.

Lead Smart Contract Developer at RentMyNFT

January 1, 2021 - November 20, 2025

Designed and developed the protocol architecture of main Renting & Reward process for collateral-based NFT rentals.

Lead Smart Contract Engineer at MNST Platform

January 1, 2021 - November 20, 2025

Built and maintained the project's smart contract protocol; remote launch pad protocol.

Founder & Lead Developer at DeezMine SAS

January 1, 2020 - November 20, 2025

Developed an NFT & NFC-based app to authenticate and track musical instruments.

Managing Director at Procoiff SAS

January 1, 2001 - November 20, 2025

Led a 15-person company for nearly 20 years; managed IT modernization, web presence, and client networks.