antoineestienne

Lead Blockchain Engineer

Dual citizenship – USA and France, born August 21st 1992

I’m a senior blockchain and full-stack engineer (US/FR) with 10 years of experience building and auditing smart contracts, decentralized identity systems, and scalable Web3 architectures. I’ve worked with teams like ConsenSys, Moonbeam, and Polygon, delivering production-grade dApps and DAO tooling. I’m now looking for part-time remote consulting roles where I can help design, build, and ship high-impact blockchain products.


Experience: 9 years

Yearly salary: $150,000

Hourly rate: $120

Nationality: 🇫🇷 France

Residency: 🇫🇷 France


Experience

Lead Blockchain Engineer
Compilot
2023 - 2025
Leveraged Polygon's DID stack to emit and verify ZK-Proof based identity on and off-chain. Wrote and deployed on Mainnet (7 different chains) audited Smart Contracts to gate on-chain access based on emitted signatures (used by 40 production smart contracts). Implemented and maintained NodeJs multi-service API used by 25,000 end users. Collaborated with Front End team to build a dashboard (used by 200 projects) and a KYC widget (5000 on-boardings).
Independent Consultant
Dowgo, VibeBio, MyLovelyPlanet
2022 - 2023
Designed and built in Solidity the Dowgo permissioned ERC20 Contracts linked to an off-chain ETF. Built React Web App to interact with Dowgo ERC20 Smart Contracts. Built and deployed Serverless infrastructure with AWS to manage blockchain/trading bridge. Advised on DAO tooling, benchmark and recommendation of best L2s for a DAO, reviewed and advised on Solidity Smart Contracts to vote on an L2. Completed full Audit of Smart Contracts and planning and appraisal for their Token Sale (with Vesting).
FS Ethereum Engineer
Purestake/Moonbeam
2020 - 2022
Contributed to the open source polkadot-js Typescript tooling to allow it to be compatible with EVM parachains (web app, api, phone app, typings and libraries). Created a Remix extension and a Ledger App for Moonbeam. Wrote full TS test suite for Moonbeam client (includes Solidity Smart Contracts). Presented and demoed Moonbeam Precompiles at Ethereum Community Conference.
FS Ethereum Engineer Consultant
Hypernetwork.io/Hypernetlabs
2018 - 2020
Designed token and governance best suited for the start-up's needs (Solidity, JS/TS). Designed and implemented a Unidirectional Payment Channel using Solidity and JS/TS. Built and deployed a contract suite for the governance using an Aragon DAO (JS, Typescript, Solidity, AragonOS).
FS Ethereum Engineer
ConsenSys
2016 - 2018
Built the MVP, a React DApp for assessors and assessees to interact on an OnChain Protocol (Solidity, Typescript). Ran research on p2p decentralized databases. Built the Mobile App for the MVP (tested at Sey Cafe on 50 users), using the Agile/scrum methodology to stay focused (React, NodeJS, Typescript). Built and ran a Defi WebApp (React/Redux) for the Beta Trading Contest, used by 150 participants over a 4 month period. Used Node.js and web3.js to handle onChain and offChain monitoring, interacting with Variable Solidity Smart Contracts. Set up tools to integrate Slack as both a community management interface and a dashboard.
Venture Analyst Intern
Total Energy Ventures
2016 - 2016
Conduct Due Diligence and prepare Investment Memorandums on CleanTech Start-up, such as United Wind. Prepare specific Sector Reviews on Energy Efficiency, Bio-gas and Internet of Everything.
Part-Time UI/UX Developer for the Central Organization
CRITEO
2016 - 2016
Assessed the needs for JIRA communication between Account Strategists, Business Developers and Technical Solutions Teams worldwide. Worked with Central Technical Team to design a User Interface to interact with JIRA using Bootstrap and Angular.js.
Business Analyst Intern
CRITEO
2015 - 2015
Used JS and SQL to build and implement a new JIRA ticketing system to optimize workflow and increase productivity within the Solutions team.

Skills

aws
hardhat
node
python
react
rust
serverless
solidity
truffle
typescript
english
french