Freelancer profile translated to English.
Back to original languageAbout Corentin
I take on applications that nobody wants to touch.
Undocumented legacy, vendor left without documentation, exploding response times, code that no one dares to modify anymore: this has been my playground for over 4 years.
Some recent results:
- ⚡API response time divided by 10(audit + refactoring of SQL queries and PHP/Python code)
- ⚡Batch processing time divided by 3(optimization of sorting and aggregation algorithms)
- 🔧Complete takeover of a billing applicationafter the vendor's departure: study, documentation, fixes without side effects.
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🖥️Legacy rescue & optimization
- Audit and profiling to identify real bottlenecks
- SQL and application optimization (PHP, Python, JS/TS)
- Taking over, documenting, and stabilizing legacy code
- Corrective and evolutionary maintenance without breaking the existing system
🏗️Product development, from MVP to production
- Backend: PHP (Symfony, Zend/Laminas), Python (FastAPI)
- Frontend: TypeScript, React, SvelteKit, TailwindCSS
- Tests: PHPUnit, Pest, pytest
- Clean Architecture (trained at WealCome & Ancyr Academy)
- Integrations: Stripe (including Connect), Sage, AWS S3, DocuSign
- Queuing: Celery, Redis, RabbitMQ — Docker, CI/CD
🧠Tooling & AI integration
- Integrating AI into your applications
- AI-assisted development daily: I deliver quickly, without sacrificing quality
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How I work:
- Fully remote, immediately available
- Time and materials or fixed price, full-time or part-time — I'm used to managing multiple clients in parallel
- Clean, tested, documented code: my goal is for any developer to be able to take over from me
- Professional English
Unsure about the state of your codebase? Write to me, I usually respond quickly.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- IndépendantBackend / Full Stack DeveloperSOFTWARE PUBLISHINGFebruary 2022 - Today (4 years and 6 months)Various achievements, mainly in **PHP**, **Python**, and **JavaScript (TypeScript)**:■Website facilitating ordering from local producers for restaurateurs(Symfony / EasyAdmin):- Development of a shop for order placement.- Development of an admin panel for managing shop content (products, promotions, categories, etc.).- Development of a dashboard for billing and order management for staff.■Application for managing the collection of used electronic equipment for refurbishment(Symfony / EasyAdmin)■ **Custom modules for Prestashop**:- Development of a custom wishlist with adding non-existent products.- Development of a custom search for a specific client need.■ Various administration dashboards(Symfony / EasyAdmin / Remix)■Creation of an AI image generation app(Python / FastAPI / SvelteKit / TailwindCSS):- API development for managing image collections and automatic generation of multiple prompts (Python / FastAPI)- Integration of the ComfyUI API for workflow management / generation- Queuing with Celery + Redis- Frontend interface for managing image collections / generation criteria / real-time display of progress and images on SvelteKit■Static site generation(Strapi / SvelteKit):- Automatic front-end build on Strapi updates- Minimal hosting costs (from €0)■Performance optimization■SQL query optimization■Evolutionary maintenance of legacy code■Showcase websites
- YacastFull Stack PHP / Symfony / REACT / Python DeveloperPRESS AND MEDIAJuly 2025 - July 2026 (1 year)Evolutionary maintenance and optimization of the group's applications.Overhaul and modernization of an application, from old Symfony to FastAPI + React.
- LVLUPFull Stack SvelteKit / Supabase / pgSQL DeveloperENTERTAINMENT AND LEISUREMarch 2025 - April 2025 (1 month)Participation in the development of a management application (SaaS) for dance schools, built withSveltekitand **Supabase**.Integration ofStripeconnect, billing,pgSQLfunctions, management dashboards, **automated tests**.
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Education
- Clean Architecture TrainingAncyr Academy2024https://ancyracademy.fr/
- TDD and Clean Architecture Training in the PHP WorldWealCome2024https://wealcomecompany.com/wealcome-php-tdd-clean-architecture-formation/
Certifications
- CodinGame Certification - PHPCodinGame2022