Freelancer profile translated to English.
Back to original languageAbout Guillaume
Guillaume — Symfony & React Developer
I design custom web and mobile applications, built to be reliable, easy to use, and useful in everyday life.
For over 4 years, I have been helping companies and freelancers transform their ideas into concrete tools: business platforms, APIs, back-offices, mobile applications.
What I do:
- Robust back-end with Symfony (API Platform, security, business logic)
- Creation of clear and efficient back-offices
- Development of high-performance REST APIs
- Integration of services (Stripe, emails, PDF...)
- Mobile applications with React Native
- Front-end
- Twig (simple, clean, efficient)
- React.js (modern and fluid interfaces)
- SEO, performance, and accessibility optimization
My way of working:
I get to the point: understand the real need, propose a relevant solution, and deliver clean, maintainable code.
No unnecessary complexity, only effective solutions.
A project?
Let's talk about it simply and move forward quickly.
French
Native or bilingual
English
Conversational
Can work on-site
Abbeville (up to 40km)
Experience
- CodeCodexWeb and Mobile DeveloperSOFTWARE PUBLISHINGOctober 2021 - May 2025 (3 years and 7 months)Amiens, FranceCodecodex is a company specializing in the development of custom business applications, mobile solutions, and robust APIs.Main responsibilities:
- Design and development of complex business applications in Symfony (API Platform, security, business logic, integration of third-party services).
- Creation of modern web interfaces (showcase site, back-office, dashboard) with React.js.
- Development of cross-platform mobile applications with React Native and Expo (state management, navigation, store publication).
- Implementation of high-performance, secure, and documented RESTful APIs.
- Close collaboration with clients to understand business needs and meet them with adapted technical solutions.
Skills developed:- Mastery of the Symfony ecosystem (API Platform, Doctrine, authentication)
- Advanced practice of React and React Native
- Integration of third-party tools (Stripe, email sending, PDF generation, etc.)
- Agile teamwork, project management, and client communication
- Maintainable, structured, and documented development
- McDonald'sTeam Member / TrainerRESTAURANTS AND FOOD SERVICESeptember 2018 - December 2020 (2 years and 3 months)Doullens, FranceParticipation in all operational tasks of the restaurant: customer reception, order taking, kitchen preparation, space maintenance.Also responsible for training new team members on procedures, hygiene, and service quality.
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Education
- Web and Mobile Web DeveloperLa Manu2021Formation axée sur les fondamentaux du développement web : Maîtrise des langages HTML, CSS/SCSS, JavaScript et PHP Développement de sites responsives et dynamiques Initiation et mise en pratique avec des frameworks modernes (Symfony, React) Approche projet, travail en équipe, versioning avec Git
- Application Designer DeveloperLa Manu2022Maîtriser toutes les composantes du développement d’un site web et mobile Intégrer les bonnes pratiques et la méthodologie du développement sécurisé des applications Documenter et déployer l’application, en suivant les principes DevOps Implémenter et exploiter une base de données Développer des composants d’accès aux données Savoir collaborer dans la gestion de projets applicatifs Savoir procéder à des tests afin de garder une application sécurisée et maniable