Freelancer profile translated to English.
Back to original languageAbout Mathieu
🏆 DeFi Frontend Engineer — Developer since 2019
🔗 Specializing in critical DeFi interfaces where frontend reliability, security, and performance directly impact execution and user trust
🌐 React, Next.js, TypeScript, Tailwind, Wagmi, Viem, Ethers.js, RainbowKit
🔐 DeFi & Web3 Frontend
⛓️ Architecture and delivery of production-grade DeFi applications: lending, staking, swaps, protocol configuration
🔄 Explicit modeling of transaction lifecycles (pending, confirmed, reverted) with pre-flight simulations to prevent failed executions before signing
🛡️ Integration of secure wallet flows via Wagmi & RainbowKit (signing, approvals, ERC-20 deposits/claims)
📡 Real-time data pipelines via WebSockets with buffered global state management for high-frequency updates
🔌 Multi-protocol abstraction layers (Paraswap, Morpho, Uniswap, Hyperbeat) for a consistent UX across heterogeneous financial primitives
⚙️ Smart contract interactions with Ethers.js and Viem — simulation and testing with Anvil/Forge on mainnet forks
📊 Asset Management Dashboard
💹 Data-dense financial dashboards for asset managers with real-time and aggregated metrics
🏗️ Internal UI infrastructure for deployment and configuration of Morpho protocols (oracles, vaults, markets)
⚡ Performance optimization: React Query caching, reduction of redundant RPC calls, controlled state publishing
🧩 Reusable component systems with Shadcn, Material UI, and Recharts
🚀 Stack & Delivery
🏎️ Next.js + TypeScript + Tailwind architectures with SSR and optimized data-fetching
📦 Deployment and maintenance on Vercel with CI/CD workflows via GitHub
🔧 Lightweight Backend: NextAuth (JWT), Next.js API routes, Prisma + Supabase (PostgreSQL)
📎 Production Projects
🔗 folks.finance . vaults.mevcapital.com · midas.app/mmev · app.amphor.io · inceptionlrt.com · app.usual.money
📧 Available for discussion
French
Native or bilingual
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- MEV CapitalSoftware Engineer | Frontend Dev | Next.js | dApp | Crypto | DeFiPRIVATE EQUITYSeptember 2024 - Today (1 year and 9 months)Montpellier, FranceAs a Frontend Developer at MEV Capital, I use Next.js to design, develop, and deploy DeFi-oriented blockchain applications, facilitating user interaction with complex financial protocols while ensuring intuitive and responsive interfaces.Skills Used
- Wagmi, RainbowKit, Ethers.js, Viem, Foundry/Anvil, Solidity, Next.js, TypeScript, React Query, Tailwind, Shadcn/ui, MUI, Recharts, Paraswap, Morpho, Hyperbeat, Uniswap, NextAuth, Prisma, Supabase, Vercel, GitHub, CI/CD, Figma
🧠DeFi, Protocol & Web3 Architecture🏗️ Frontend architecture for complex DeFi applications: defining state strategies and deterministic transaction lifecycles🔄 Explicit modeling of transaction states (simulation → signing → pending → confirmed → reverted) to ensure predictable UX and reduce execution risk🛡️ Implementation of pre-flight simulations on the backend to validate deposits, swaps, and lending actions before user signing🔗 Unified abstraction layers for multi-protocol integrations (Paraswap, Morpho, Uniswap), ensuring consistent UX across heterogeneous DeFi primitives⚠️ Gas-aware UX patterns and structured decoding of blockchain errors to minimize failed transactions⚡ Real-time WebSocket pipelines with buffered global state for high-frequency financial updates💰 Comprehensive interfaces: lending, staking, swaps, liquidity provisioning, approvals, and protocol configuration📈 High-precision dashboards: TVL, balances, performance, and risk parameters🔥 dApp–smart contract integration tests via Anvil mainnet forks for deterministic frontend testing🔍 Knowledge of perpetual DEX mechanics (long/short, leverage, funding, liquidations, orderbooks) and their implications on frontend state management - BoardridersFullstack Developer - React & Django for Corporate Web AppLOGISTICS AND SUPPLY CHAINJanuary 2020 - December 2023 (4 years)Los Angeles, United StatesAt Boardriders, I developedweb applicationsfor the Product and Planning teams, centralizing development and purchasing processes.Skills Used
- React JS, Django (Python), REST API, JWT Authentication, Docker, Nginx, GitHub, UAT Testing, Project Management, JIRA
Project Management- I joined a project team led by one of my colleagues in Australia, and we were assisted by key business users, allowing us to understand their difficulties and challenges.
- We usedJIRAto create tickets and track progress, with weekly meetings.
Back-End Development- One of the challenges was to standardize the data used. I collaborated with theBI architectto createSQL tablesfeeding the **Django backend**.
- I set up the variousendpointsfor the API withDjango Rest Framework(Python), definingURLs**, **views**, and **serializersto transform and provide data to the Frontend.
- Authentication and access management were handled with **JSON Web Token (JWT)**.
Front-End Development- We defined standardized visuals for the web application, offering filters after authentication to generate an input form.
- UsingReactand its hooks (**useState, useEffect**), we retrieved data via the **Django REST API**.
- Once the data was entered, it was sent to theDjango backendfor centralization, enablingglobal reports via Reactor **visualization tools like Tableau**.
- Acomponent-basedarchitecture was favored to optimize code and ensure efficient maintainability.
Testing & Deployment- All changes were logged inJIRAand subjected to user acceptance testing (**UAT**) to ensure functionality and prevent regressions.
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Education
- Computer EngineeringESTIA2016J'ai intégré l'Ecole Supérieure des Technologies Industrielles Avancées en 2013 après une classe préparatoires Math Sup / Math Spé à Montpellier. Diplomé de cette école en 2016 avec un double diplôme obtenu à l'université de Wolverhampton, spécialité Lifecycle Management and Supply Chain Management