Freelancer profile translated to English.
Back to original languageAbout Cyrius
Python backend developer specializing in high-performance, concurrent, and distributed systems.
I help companies build reliable and scalable backends: APIs, processing orchestration, real-time communication, and concurrency management. My approach: understand business needs, deliver clean, tested, and documented code, and remain autonomous in design and technical reviews.
What I work on:
🔹 Development of robust backend APIs (FastAPI, Python)
🔹 Orchestration and distributed systems: schedulers, task queues, workers
🔹 Event-driven real-time communication (WebSockets)
🔹 Concurrency management and SQL transactions
🔹 Automation, CLI tools, and Docker containerization
Some concrete achievements:
– Design of a Python scheduler orchestrating distributed processing across multiple environments, on a system handling several hundred geospatial jobs/day (CS Group internship – space sector)
– Development of anomaly detection CLI tools that reduced error analysis time by approximately 1 hour (PricingHub internship)
– Demanding personal projects: C database engine (paging, persistence, B-tree index, SQL-like interpreter), C++/SFML 2D game engine (real-time loop, AABB collisions), and a tested and tooled Python simulation engine (Pytest, Ruff, modular architecture)
My profile: Software Engineer graduated from ISEP (mention Bien - with honors), passionate about performance, software architecture, and the internal mechanisms of systems. Fluent English (TOEIC 945).
I am looking for Python backend, data, or API missions — short or long, in Paris or remote. Available quickly.
📩 Describe your project, I'll reply within the day.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km)
Experience
- CS Group (Espace)Software Engineer (internship)SOFTWARE PUBLISHINGMarch 2025 - September 2025 (6 months)Toulouse, FranceRefactoring of a critical system orchestrating several hundred geospatial processing tasks per day.
- Development of a Python scheduler orchestrating distributed processing across different environments
- Event-driven real-time communications between server and workers via WebSockets
- Concurrency management and SQL transactions on task queues
- Evolution of the FastAPI architecture to simplify processing management
- Design and validation of features with strong autonomy and technical reviews
- PRICINGHUBSoftware Engineer (internship)SOFTWARE PUBLISHINGAugust 2023 - February 2024 (6 months)Paris, FranceDevelopment and deployment of automated validation tools for data quality control.
- Development of CLI tools automating anomaly detection
- Reduction of error analysis time by approximately 1 hour
- Containerization and deployment of tools as Docker images
- Projet personnel (Open Source)Developer — C Database EngineSOFTWARE PUBLISHINGMarch 2026 - May 2026 (2 months)Paris, FranceDatabase engine developed in C to explore the internal mechanisms of databases: memory/disk management, persistence, and storage engine organization. Code available open source on GitHub.
- Design of a pager ensuring disk I/O management by memory pages
- Implementation of file persistence and data serialization/deserialization mechanisms
- Development of a B-tree index with search, insertion, and node splitting
- Manipulation of low-level memory structures and manual memory management in C
- Implementation of a SQL-like interpreter inspired by SQLite's operation
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Education
- Engineering degree, software specialization (with honors)ISEP – Higher Institute of Electronics of Paris2025Formation d'ingénieur généraliste avec spécialisation logiciel. Cursus orienté génie logiciel, algorithmique, bases de données et systèmes. Compétences développées : conception et architecture logicielle, algorithmes et structures de données, programmation bas niveau, bases de données et systèmes d'exploitation.
- Exchange semesterINHA University2024Semestre d'échange international. Cours suivis : Operating Systems, Database Design, Computer Vision.