Freelancer profile translated to English.
Back to original languageAbout Alexandre
💻 Smart Contract & Full Stack Web3 Developer — 8 years of experience.
Independent consultant for DeFi / Web3 companies.
Specializing in blockchain development (EVM, Solidity), I design and deploy secure smart contracts for DeFi, NFT, and GameFi projects. I combine this expertise with strong front-end and back-end skills to deliver complete dApps.
🔍 What I can do for you:
✔️ Solidity Smart Contracts: design, development, testing, deployment
✔️ Security & Optimization: audits, gas optimization, upgradeable proxy patterns
✔️ Tokens: ERC20, ERC4626 (tokens and staking)
✔️ NFTs: ERC721, ERC1155, IPFS
✔️ DeFi: staking, vaults, custom protocols
✔️ Front-end: React/Next.js + Web3 interactions (Metamask, Ledger, WalletConnect)
✔️ Back-end: Go or NodeJS, GraphQL, indexing...
✔️ Hosting: IPFS, AWS, custom...
🔨 Technical Stack:
Blockchain & Smart Contracts
- Solidity, Foundry, Hardhat, OpenZeppelin
- EVM, Ethereum, Hyperliquid, Arbitrum, Polygon, BNB...
- Web3, Viem, EthersJS, Wagmi
- Upgradeable contracts (proxy patterns)
- ERC-4337 (Account Abstraction)
Front-end
- Typescript, React, Next.js
- Tailwind, SASS
- Vite, Webpack
Back-end & Data
- Go, NodeJS, Express
- SQL, PostgreSQL, GraphQL
- REST API Architecture, OpenAPI
🎯 I undertake short missions (audits, POCs) as well as long-term projects (complete development of DeFi protocols, NFT platforms, Web3 games).
📩 Contact me and let's discuss your project!
French
Native or bilingual
Spanish
Native or bilingual
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- HyperswapFull Stack EngineerSOFTWARE PUBLISHINGJune 2025 - December 2025 (6 months)Paris, FranceMission to integrate HIP3 Hyperliquid into the hyperswap.exchange platform. Implementation of price data indexing for various Hyperliquid asset pairs and future HIP3 pairs. Deployment of an API and integration of a trading interface for perpetual contracts. Maintenance and fixes.
- KilnSmart Contract EngineerSOFTWARE PUBLISHINGAugust 2024 - May 2025 (9 months)Paris, FranceBlockchain engineering, Solidity and GO. Creation of a DeFi routing product allowing users multi-chain swaps of their positions. Integration of the LiFi protocol and back-end architecture for Kiln Widget. Maintenance and deployment of staking smart contracts. Research and development.
- BonesBetFounder and Game DirectorVIDEO GAMES AND ANIMATIONNovember 2021 - July 2024 (2 years and 8 months)Paris, FranceCreation of an NFT collection to raise funds for the development of a Web3 game. Smart contract design, NFT creation and management. Creation of 3D and 2D assets and environments. Management of a team of 8 talents (developers, designers, and modelers). dApp deployment and maintenance.
Reviews
Pierre
Lemon Learning
Reviewed on 7/22/2019
Very good first contact with Alexandre. Remarkable speed of execution and quality deliverables: we recommend.
Recommendations
LP+1
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Education
- Master - Web Development EngineerHETIC2022Développement, Design et Marketing Web.
- MANAA (Artistic Foundation Year)Ecole de condé2017Mise à niveau en arts appliqués