Open to opportunities

Solène PETTIER

@solenemep

Message

Senior blockchain engineer focused on secure DeFi and DePIN smart contracts.

Spain

Message

What I'm looking for

I’m looking for a team building DeFi/DePIN with deep security ownership—smart contract audits, gas optimization, and production-grade CI/CD. I want to work end-to-end on protocols, integrations, and cross-chain infrastructure with clear engineering standards.

I’m a blockchain & full-stack engineer focused on DeFi financial protocols, decentralized insurance, trading systems, and cross-chain infrastructure. I design, build, and test smart contracts with an emphasis on security, gas optimization, and decentralized architecture, and I connect contracts to backend services using TypeScript and Node.js. I’m currently working on a DePIN protocol, covering everything from protocol contracts to integration.

In my recent role as a Senior Blockchain Engineer at Impossible Cloud Network, I build end-to-end DePIN protocol systems—DePIN protocol and integration, React front-ends, and Node.js back-end services—while implementing tokenomics and deploying dApps. I own the full security lifecycle, including threat modelling, audit preparation, vulnerability fixes, and I set gas optimization standards and engineering best practices for the team. I also prepare robust CI/CD pipelines for contract testing and deployment and maintain NatSpec, architecture, and technical specs for auditors; earlier work includes DeFi and NFT EVM contracts, reducing gas via storage and efficient data structures, and writing unit, fuzz, and invariant tests before mainnet.

Experience

Work history, roles, and key accomplishments

Current

Senior Blockchain Engineer

Current

Impossible Cloud Network

Jan 2025 - Present (1 year 5 months)

Designed, built, and tested smart contracts for a DePIN protocol, with emphasis on security, gas optimization standards, and decentralized architecture. Connected contracts to TypeScript/Node.js services and handled contract maintenance, upgrades, and audit preparation using Foundry.

Solidity DeFi Foundry EVM TypeScript Node.Js Smart Contract Auditing NodeJS

Full Stack Blockchain Developer

Alyra School

Jan 2021 - Jul 2021 (6 months)

Designed and implemented smart contract systems end-to-end, including a DePIN protocol integration with React front-ends and Node.js back-end services. Covered the full security lifecycle with threat modeling, audit preparation, and vulnerability fixes, alongside gas optimization and contract CI/CD practices.

Solidity Web3 Hardhat React JavaScript Node.Js Express CI CD PostgreSQL NodeJS

Education

Degrees, certifications, and relevant coursework

Impossible Cloud Network

Certification, Blockchain & Web3

2025 -

Activities and societies: Solidity/Web3; threat modeling, audit preparation and fixes; gas optimization best practices; CI/CD for contract testing/deployment; NatSpec and technical documentation.

Certification covering the full blockchain stack with a focus on Solidity and Web3 engineering. Covered secure smart contract design, gas optimization standards, and contract testing/deployment automation.

National Superior School of Mines

MSc Information Technology Engineer, Information Technology Engineering

2013 - 2016

Activities and societies: Broad curriculum spanning IT systems, architecture, networks, and software development.

MSc in Information Technology Engineering from a French top engineering school. Built a broad foundation across IT systems, architecture, networks, and software development.

Alyra School

Certification, Blockchain & Web3

2021 -

Activities and societies: DePIN protocol and integration; React front-ends; TypeScript/Node.js back-end services; tokenomics implementation deploying dApps end-to-end.

Certification covering the full blockchain stack, including Solidity smart contracts and Web3. Designed and implemented smart contract systems from scratch and built end-to-end dApps with React front-ends and Node.js back-end services.

Michelet Hightschool

Intensive course, Mathematics & Physics (Preparatory)

2011 - 2013

Activities and societies: Advanced mathematics & physics coursework.

Selective two-year preparatory curriculum in advanced mathematics and physics. Followed the standard French pathway before engineering schools, under high competition.