Freelancer profile translated to English.
Back to original languageAbout Sylvain
I develop performant web applications and robust business tools, with backend expertise in Rust.
Looking for a developer capable of building a reliable, performant, and maintainable web application?
I design and develop web applications, APIs, and business tools with strong backend expertise in Rust, and frontend experience in React and TypeScript.
I work on both new projects and existing applications.
🎯 My areas of intervention:
- Backend development in Rust (APIs, services, performance)
- Frontend development (React, TypeScript, TailwindCSS)
- Design of web and SaaS applications
- Development of desktop applications with Tauri
- Implementation of maintainable architectures (DDD, onion architecture)
- Real-time systems and inter-service communication
- Database integration (PostgreSQL, SQL, Supabase)
- Refactoring and improvement of existing code
💡 My approach:
- clean, structured, and maintainable code
- particular attention to backend performance
- autonomy on complex technical subjects
- simple and effective collaboration
⚙️ Main technologies:
Rust • React • TypeScript • PostgreSQL • Supabase • Tauri
➕ Other experiences:
Svelte • Node.js • Python (Flask) • C++ • Kotlin • GitLab CI/CD • Bazel • ROS
🛠️ Work methods:
I use modern tools, including generative AI, to accelerate development while maintaining a high level of quality.
🚀 Experience:
Projects combining Rust backend, web (React), and real-time systems, particularly in robotics and industrial contexts (ROS, embedded systems, inter-service communication).
📍 Availability:
Open to freelance opportunities – availability to be discussed.
French
Native or bilingual
English
Fluent
Can work on-site
Lille (up to 50km), Dunkerque (up to 50km)
Experience
- FRANCELOGSoftware Engineer | Rust / React / TauriTECHAugust 2025 - Today (1 year)Linselles, France→ Mission Objective:Design a supervision application to control and configure communicating network equipment in real-time, with strong constraints on performance and low-level communication.→ Achievements:- Design of a distributed architecture combining a desktop application (Tauri) and a Rust backend- Development of a React user interface for real-time visualization and control of equipment- Implementation of UDP network communication to interact directly with physical equipment- Use of Tauri as an embedded mini-backend to manage network communication and relay data to the interface- Development of a REST API server with Axum for managing accounts, configurations, and system states- Implementation of a real-time system with Server-Sent Events (SSE) to synchronize interfaces- Development of a user management system with roles and permissions (JWT authentication, Argon2 hashing)- Integration of equipment visualization and their interactions (React Flow)- Implementation of key features: real-time supervision, dynamic configuration, account management, log reporting- Management of technical constraints related to real-time, performance, and network communication→ Technical Stack:Rust, React.js, TypeScript, Tauri, Axum, UDP, SSE, SQLite, JWT
- SaasakFullstack Developer | Svelte / TypescriptSOFTWARE PUBLISHINGOctober 2024 - January 2025 (3 months)Dunkerque, France→ Mission Objective:Develop a web application to identify waste and provide appropriate sorting instructions, with a focus on mobile experience and performance constraints.→ Achievements:- Development of a Svelte frontend application optimized for mobile- Design of an interface for waste recognition via image- Analysis and testing of several embedded AI approaches (Roboflow, OpenCV, convolutional models)- Implementation of an API-based solution (OpenRouter / Gemini) to ensure performance and simplicity- Implementation of a recognition system based on prompt + image with local contextualization- Development of an interactive map of collection points with Leaflet- Design of a complete backoffice for data, community, and content management- Implementation of secure authentication and multi-community management- Optimization of the user experience on mobile with resource constraints→ Technical Stack:Svelte, TypeScript, Supabase, Leaflet.js, OpenRouter, GitHub Actions
- WhispeakBackend & Embedded Developer | Rust / C++ / KotlinSOFTWARE PUBLISHINGOctober 2023 - October 2024 (1 year)Lille, France→ Mission Objective:Develop software engines for voice AI model exploitation on different environments (server and embedded).→ Achievements:- Development of engines in Rust and C++ for voice authentication and identification- Implementation of features for voice signature creation, authentication, and identification- Implementation of scoring and deepfake detection systems- Interface engines with AI models (TensorFlow, PyTorch)- Maintenance and optimization of C++ code (memory leak resolution with Valgrind)- Implementation of unit tests and CI/CD (GitLab)- Industrialization of the build with Bazel to standardize deployments- Development of an Android mobile application (Kotlin) to demonstrate engine capabilities- Close collaboration with AI research teams→ Technical Stack:Rust, C++, Kotlin, TensorFlow, PyTorch, GitLab CI/CD, Bazel
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Education
- Ingénierie mécaniqueINSA Strasbourg2017Ingénierie mécanique
- Diplôme d'ingénieur, RobotiqueISEN - Institut Supérieur de l'Electronique et du Numérique2020Diplôme d'ingénieur, Robotique