Freelancer profile translated to English.
Back to original languageAbout William
Senior developer specializing in designing modern, high-performance, and maintainable web applications.
I help companies automate their processes, structure their backends, and make their existing applications reliable, with a pragmatic, readable, and maintainable approach.
I regularly work on Python, PHP, and Node.js backends, developing APIs consumed by JavaScript / TypeScript / React frontends, as well as by business systems and custom advanced WordPress platforms.
My work regularly focuses on:
- Python Development (APIs, scripts, backend services)
- Business Process Automation
- Document Generation (PDFs, reports, exports)
- Service Integration and Orchestration (APIs, AI, internal tools)
- Refactoring and structuring existing projects
I also work on modern web interfaces:
- Frontend development in React
- Web applications in JavaScript and TypeScript
- Frontend ↔ Backend Connection (APIs, authentication, data flows)
I also have strong advanced WordPress expertise (PHP, ACF, Gutenberg, performance, security), mainly used for back-offices, business logic sites, or custom hybrid web/application products.
My working method:
- Clear and realistic scope definition
- Controlled scope
- Clean and documented code
- Priority on stability and operability
I prefer concrete technical missions with real impact, clearly identified needs, and a controlled scope.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- Projet personnel / R&D indépendanteDesign and development of a cognitive systemSOFTWARE PUBLISHINGNovember 2025 - Today (7 months)Design and development of a cognitive application system aimed at modeling decision-making, perception, and action execution in complex digital environments.The project is based on a modular and distributed architecture, inspired by software engineering and adaptive systems principles: clear separation between perception (signals, events), reasoning, orchestration, and effectors.Implementation of backend services in Python and PHP, exposed via REST APIs, enabling structured signal circulation, event normalization, and contextual decision-making. The system is designed to remain general-purpose, use-case independent, and extensible without a complete overhaul.Particular attention was paid to:- clarity of decision flows- code maintainability- robustness of inter-module exchanges- progressive system evolution capabilityThis work involved advanced issues in software architecture, algorithms, state management, decoupling of responsibilities, and service orchestration, with a product-oriented and long-term approach.The system now serves as an experimental foundation for applications such as intelligent automation, contextual analysis, behavior generation, and controlled integration of AI services.
- WeSoftOnlineFull-stack developer and trainerEDUCATION AND E-LEARNINGApril 2024 - September 2025 (1 year and 5 months)WeSoftOnline is an innovative e-learning platform for learning web development with a gamified and interactive approach. The project required the design of a scalable and high-performance architecture capable of handling a large number of users and dynamic courses.🔹 Project Objectives- Develop an intuitive and engaging platform, integrating interactive exercises, courses, quizzes, etc.- Design a robust back-office for managing users, courses, and subscriptions.- Optimize performance and SEO for a smooth experience and good search engine ranking.- Integrate a code validation engine to allow students to test their solutions in real-time.🎯 Work Performed- Development of a complete web application, combining an interactive frontend and a high-performance backend.- Integration of an educational visual novel engine, combining interactive storytelling and practical exercises.- Creation of a user and subscription management system via WooCommerce.- Development of an automatic code validation engine based on Judge0.- Implementation of a custom WordPress for content and training management.- SEO and accessibility optimization to maximize site visibility and accessibility.🛠️ Technologies and Concepts UsedFrontend Development:- JavaScript, HTML5, CSS3, SCSS- Animations and interactive effects with GSAP and PhaserBackend Development:- PHP / WordPress / WooCommerce for subscription management- MySQL for database managementInfrastructure and Tools:- Git / GitHub for code and version management- CI/CD workflow for automated deployment
- ReverbFull-stack web developerSOFTWARE PUBLISHINGAugust 2022 - July 2024 (1 year and 10 months)Reverb was looking for a full-stack developer for regular assignments in web application development (frontend and backend). Currently, over 15 assignments have been completed for this web agency since September 2022.Company's field of activity:Reverb is a web agency specializing in digital communication through websites, social networks, etc...Work performed:- Development of custom websites based on mockups and specifications (JavaScript, TypeScript, React, PHP, Symfony, WordPress)- Development of administration dashboards and REST APIs- Creation of natural referencing and website accessibility optimization plans- Monitoring and evolution of existing websites- Analysis and proposal of website improvements- Training of end clients on the use of developed toolsConcepts and technologies used:- HTML5 / CSS3 / SCSS- JavaScript / TypeScript- React- Redux / Redux Toolkit- PHP- Symfony- Use of various libraries like GreenSock- Creation and use of REST APIs- Versioning and collaboration with Git and GitHub- Use of Gitflow workflow- Design patterns (factories, singleton, props-drilling, state-hoisting, etc..)- Unit tests, integration tests, and creation of End-to-End test plans with Jest- SEO and accessibility optimization- Algorithm creation- Agile project management- Use of Photoshop, Figma, and Adobe XD- WordPress and creation of custom plugins and themesThanks to the Reverb team for their trust 🙏
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Education
- Computer Science Bachelor's DegreeUniversity of Orléans2015- Compréhension et étude des algorithmes et architectures logicielles - Gestion de projets - Travail d'équipe, esprit d'analyse, esprit critique, conseils - Développement logiciel (C, C++, Java) - Développement web (HTML, CSS, Javascript, PHP, Bootstrap) - Développement mobile sous Android (Java) - Base de données (Mysql, Oracle)