Freelancer profile translated to English.
Back to original languageAbout Leo
✅ Current experience in aeronautical IHS design following ARINC 429/653 standards based on embedded C.
🧑💼 Cybersecurity Engineer by training (degree obtained in 2023).
⭐️ Passionate about web and software architecture.
✨ 5 years of professional experience in development.
✨ Being demanding about code quality and depending on project size, I often favor "clean code / clean architecture" standards. Nevertheless, if performance is a crucial subject, I favor other types of architectures.
🧑💼 I master the principles of the Agile manifesto and particularly use the SCRUM methodology derived from it.
I have rich and varied experience, which has allowed me to work on projects ranging from low-level development to scraping, data analysis, and automation. This diversity gives me a different perspective than a classic web developer. I don't favor any particular language, preferring to adapt stacks to the specific needs of each project.
⚡ My strengths: Typescript, C++, Python, C, Node.js
⚡ The technologies I practice most right now are Rust and Go.
⚡ Regarding mobile technologies, I primarily use React Native and Flutter.
⚡ The frameworks I regularly use are Next.js, Nuxt.js, Django, Express.js
⚡ For deployment, I mainly use simple containerization & deployment to a lambda host, Coolify, or Railways.
Recently, I have developed skills in creating Solana memecoin trading platforms, working on the frontend. I used technologies like TradingView, the GeckoTerminal API, and the QuickNode API. This experience has allowed me to refine my rigor in developing financial transaction flows.
Personal website:
SEO analyzer:
English
Native or bilingual
French
Native or bilingual
Remote only
Primarily works remotely
Experience
- L'Oréal SA - L'Oréal Access FranceBackend .NET Developer / Advanced Technical SupportEDUCATION AND E-LEARNINGJuly 2025 - December 2025 (5 months)Bordeaux, FranceMaintenance & Technical Support:• Production support management: diagnosing and resolving deployment issues, fixing critical bugs, and stabilizing features in a live environment.• Adding and improving features on existing infrastructure, in a demanding CI/CD pipeline context with continuous deployment.Optimization & Performance:• Frontend rendering optimization for the product catalog: reducing display latency and improving interface responsiveness.• Implementation of an infinite scroll pagination system to enhance navigation fluidity and user experience with large data volumes.Migration & Modernization:• Complete refactoring of an internal project: migrating an application from Nuxt.js 2 to a full C# Blazor ecosystem, ensuring better technological unification and simplified front/back maintenance.• Codebase rationalization and UI component harmonization under Blazor to maximize product consistency, performance, and maintainability.
- TrakalyzeMission: Development and management of a trade journaling platformPRIVATE EQUITYMay 2025 - March 2026 (10 months)Bordeaux, FranceArchitecture & Infrastructure:•Design and supervision of the overall software architecture (front, back, worker, and asynchronous services).•Full deployment and orchestration of the environment on Railway (Django, Celery, Redis, PostgreSQL).•Setup of a dedicated SMTP service and an asynchronous worker for managing email dispatches, coupled with a Django beat for scheduled tasks (cron).•Integration of S3 storage with secure signing for file and attachment management.Advanced Features & Technical Innovation:•Development of a real-time collaborative notebook, based on Ypy + ypy-websocket, integrated with Tiptap, and utilizing CRDT Y.Doc for conflict-free multi-user synchronization.•Creation of a smart notes system linked to trades or strategies, with distributed front/back caching (Redis) for near-zero latency.•Design of a Notion-like progress tracker: creation of recurring tasks, graphical monitoring, and statistical analysis of progress ratios.Data & Analysis:•Design of a generic trading data integration architecture, unifying heterogeneous sources via a modular poller, an RTC WebSocket stream, and data normalization.•Setup of a real-time analytical dashboard for visualizing and measuring strategy performance.Artificial Intelligence & RAG•Development of an AI conversational agent microservice connected to a custom RAG system:•Contextual text retrieval (BM25) and structured retrieval (SQL).•Integration and testing of LLaMA 3B and 8B models for local prototyping.•Design of a hybrid intelligent router, combining a proprietary holistic algorithm and an ML classification model for semantic routing of requests in French.
- OnlyOneElectron DeveloperVIDEO GAMES AND ANIMATIONSeptember 2023 - May 2025 (1 year and 7 months)Bordeaux, FranceAs a full-stack developer specializing in Electron.js and Node.js, I significantly contributed to the evolution of OnlyOne, integrating advanced features and optimizing its infrastructure. I established a secure development/testing/production environment, successfully integrated Blizzard, Riot Games, and Epic Games, and developed an avatar border system with notifications for new levels.I also automated database backups, improved user experience through UI/UX adjustments, and maintained connectivity during reloads.My role was essential in improving the platform's performance and reliability while enhancing the user experience.Currently (01-01-2025):- Implementation of a Go Action/Reward microservice connected to a Node.js backend using gRPC.- Implementation of a Rust microservice for media optimization & resizing. Transformations are done in webp and webm.- Rudimentary hexagonal refactoring (entity, contract, repository, and use-case) of the TypeScript backend.- Implementation of a queue broker to ensure gRPC communication persistence.- Deployment of version 1.4 with graphical redesigns.
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Education
- Computer EngineeringCESIMise en pratique de la méthode pédagogique PBL. Spécialité informatique logicielle
Certifications
- Self-taughtSelf-taught