Lionel Limol

Production DeFi and blockchain infrastructure on Flow Cadence and EVM. Cross-VM architecture, backend/protocol work, oracle/DEX analysis, anti-spam protections, rate limits, audit readiness, tests, CI/CD and AI-assisted delivery.

Built the blockchain integration layer for an EVM arbitrage bot. Focused on DEX connectivity, Uniswap-style AMM architecture, pool/router contracts, reserve reads, swap functions, calldata/events, transaction analysis, liquidity movements, and opcode-level review when needed. Contribution focused on blockchain/backend integration, not trading operations.

Implemented and reviewed Solidity smart contracts for tokenization, investor access controls, on-chain lifecycle operations, and compliance-sensitive flows. Integrated contracts with backend/API workflows and secure off-chain/on-chain interaction patterns.

Reviewed smart contract logic, protocol assumptions, integration risks, access-control paths, transaction flows, and failure modes. Produced audit-oriented remediation guidance.

Contributed to EVM infrastructure and developer usability, including OP Stack / OP Bedrock documentation, data availability concepts, and smart contract/backend integration guidance.

Taught Solidity, Ethereum/EVM, smart contracts, wallets, transactions, ethers.js, MetaMask, Web3 integration patterns, and mentored learners through code reviews and debugging.

NFT Marketplace built on the Flow Blockchain. Technical environment : Languages : Cadence, JavaScript (ES6+), Typescript, NodeJS. Frameworks/ Libraries : Serverless,Next, Express, Flow Client Library. Databases : MongoDB (NoSQL) / Mongoose. Cloud : Amazon Web Services, Google Analytics. Tests: Jest. Methodologies/tools : Restful API, Scrum, Webpack, Yarn, Npm, Git.

Metaverse dApp built on the Flow Blockchain. Technical environment : Languages : Cadence, JavaScript (ES6+), Typescript, NodeJS. Frameworks/ Libraries :React, Express, Redux, Flow Client Library, GraphQL Apollo. Databases : MongoDB (NoSQL) / Mongoose. Cloud : Heroku. Methodologies/tools : Restful API, Scrum, Webpack, Yarn, Npm, Gitlab.

1st NFT Marketplace built on the Flow Blockchain. Technical environment : Languages : Cadence, JavaScript (ES6+), Typescript, NodeJS. Frameworks/ Libraries : React, Flow Client Library, Recoil.js, Chakra-UI. Methodologies/tools : Scrum, Webpack, Yarn, Npm, Git.

MVP (mobile app) of a PAYT (Pay As You Throw) service, enabling a user to visualize his waste output, bills and personal datas. Technical environment : Languages : Solidity, JavaScript (ES6+), Typescript, NodeJS. Frameworks/ Libraries : React Native, Ethers.js, Hardhat, Express, Material UI. Databases: PostgreSQL. Cloud: Heroku. Methodologies/tools : Scrum, Expo, Yarn, Npm, Git.

Mecasem is an Expert group in Industrial Testings and Metrology. Responsible for the mechanical laboratory, I supervised 4 technicians on mechanical (ISO 6892, ISO 4136, ISO 148, EN 2002, ASTM E8, weld assembly ) and fatigue testings (ISO E399, E466, BS 7442, Kic, CTOD, JIc and resistance curve). Testings were realized according to COFRAC and NADCAP requirements. ° Cost estimates elaboration ° Customer relations monitoring ° Testings report writing and standard watch ° Team management ° Maintenance of machine tools keywords: mechanical testings, laboratory, management, consultant

My research is related to the understanding of the damages of Poly(methyl methacrylate) (PMMA), Polystyrene (PS) or Polycarbonate (PC) surfaces by fatigue scratch tests. Indeed, decrease the fatigue wear occurring in prosthetic knee implants or on glass lenses represents a challenge for material science and tribology. The goal of my thesis is to establish a causal relationship between the main contact parameters (load, speed and friction) so it'll be possible to size those surfaces according to in-service parameters. ° Management of a scientific project (Planning, Executing, and Closing); ° Define and organize tests programmes; ° Mechanical testing of polymer surfaces (scratch test - ISO 19252); ° Mechanical testing of bulk polymers (tensile test, compression, DMTA - ISO 6721); ° Organize reproducible tests protocol; ° Scientific, Technology and Regulatory watch; ° Reporting, Diffusion and Promotion of the results. As a doctoral assistant, I'm in charge of practical classes of Applied Mechanics, Solid Mechanics and Mechanical Systems at INSA Strasbourg where I've trained more than 200 students. keywords: scratch, indentation, polymer, contact fatigue, teaching, research.

Hired to reduce the costs due to the wear of mechanical components, I developed my competences in industrial tribology improving the performances of VALE S.A. iron ore treatment plants. ° Partnership with raw materials providers (pump rotor, cone crusher coating and conveyor belt); ° Increase about 400% of the performance of pump rotors substituting rubber by polyurethane; ° New analysis technique for low quality raw materials (portable FTIR). Sponsor: Vale S.A., 70 000 employees, Revenue: US$ 34 billions (2017). keywords: mining tribology, problem solving.

I was in charge of the design of the experiments to understand the wear of conveyor belts and cone crusher coatings employed in the mining industry by Vale S.A. I developed a analysis method that allows to know the in-service performance of wear parts before installing them. ° Experimental protocol and university collaboration (4 universities); ° Performing mechanical tests: - indentation - hardness (Rockwell (ISO 6508), Brinell (ISO 6506), Vickers (ISO 6507) & Shore A et D (ISO 7619)); - tensile tests (ISO 6892); - wear tests: pin-on-drum (ISO 4649) and dry sand/rubber wheel (ISO 28080); ° Writing of scientific reports for the sponsor. Sponsor: Vale S.A., 70 000 employees, Revenue: US$ 34 billions (2017). keywords: R&D, test engineer, industrial partnership, wear tests.