Freelancer profile translated to English.
Back to original languageAbout Nicolas
Immediately available for remote missions.
I help companies, startups, and freelancers develop, maintain, and evolve their backend applications, APIs, and web platforms.
I am involved in developing new features, fixing bugs, improving performance, and integrating third-party services.
Areas of Expertise
- Symfony and REST API Development
- Third-party service integration and data synchronization
- Stripe: payments, subscriptions, and webhooks
- Bug Fixing and Application Maintenance
- Performance Optimization
- SaaS platform and business tool development
- Custom Website and Web Application Development
- React and Next.js Interface Development
Recent Projects
- Private jet booking platform with Symfony, Next.js, and Stripe.
- Premium e-commerce platform with payments and an administrator area.
- Connected application synchronized via APIs and MQTT.
Technologies
Symfony · REST API · PostgreSQL · MySQL · Stripe · TypeScript · React · Next.js · Docker
Complementary Expertise
Python, automation, IoT, MQTT, ESP32, and connected devices.
Available for short or long-term missions, technical support, maintenance, bug fixes, or complete application development.
French
Native or bilingual
English
Fluent
Can work on-site
Lille (up to 50km), Paris (up to 50km), Lyon (up to 50km), Bordeaux (up to 10km), Nantes (up to 10km)
Experience
- Cawa-AirFull-Stack Symfony / Next.js DeveloperTRAVEL AND TOURISMOctober 2025 - Today (10 months)Paris, FranceFull development of a private jet booking platform — from initial architecture to production deployment in 5 months.Symfony backend coupled with a Next.js frontend, with Stripe integration for payments and third-party air data synchronization.Achievements:• Full-stack Symfony architecture (API Platform, Doctrine ORM, PostgreSQL)• Management of bookings, flight availability, and user profiles• Complete Stripe integration: secure payments, webhooks, status management• Air data synchronization via external APIs• Administrator dashboard with booking tracking and reporting• Production deployment in 5 months, from 0 to operational platform
- Niconyx Systems LtdBackend Engineer & API DeveloperSOFTWARE PUBLISHINGMay 2026 - Today (3 months)Development of custom backend solutions and integrations for companies and startups.Achievements:
- Development of REST APIs and business backends.
- Integration of Stripe payment systems (webhooks, subscriptions, payments).
- Automation of business processes and data synchronization.
- Development of web platforms and SaaS solutions.
- Design of scalable and maintainable backend architectures.
- MLA SystemsAndroid & Embedded Systems DeveloperTECHMay 2026 - June 2026 (1 month)Madrid, SpainDevelopment of a complete Android application for controlling an intelligent alarm system communicating via Bluetooth Low Energy (BLE) and ESP-NOW.The master/slave architecture connects an embedded backend to remote ESP32 modules. The application manages two access levels (admin / user) with real-time state synchronization.Achievements:• Design and development of the Android interface from A to Z• Dynamic inventory of equipment with connection status and battery level• Pairing and configuration flow for BLE devices• Abstraction layer facilitating integration with the ESP-NOW firmware• Bidirectional synchronization model between local settings and remote equipment• Delivery of documented, maintainable code ready for firmware evolution
Recommendations
AS
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Education
- Computer Engineering DegreeEsprit School of Engineering2024
Certifications
- Responsive Web DesignfreeCodeCamp2026
- Applications of AI for Predictive MaintenanceNVIDIA DLI2023