Simon Chabrier
Full Stack Application Developer Designer
About
Specializing in Symfony, I design and deliver advanced business web applications end-to-end. My code is documented, tested and continuously deployed. Passionate about technical challenges, I continuously explore new technologies on my personal Ubuntu server. I also enjoy sharing knowledge, research and best practices.
Professional
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- Application Developer Designer @LibreSensAgen, France - On-siteMissions:
- Full ownership of custom Symfony web applications and features, from technical design to production deployment.
Responsabilités:
- In collaboration with the Product Owner and the team, based on the study of the specifications, I establish the design documents for the applications and/or features assigned to me, ensuring risk analysis and detailing/planning the different delivery phases from the MVP to the finished product.
Achievements:
- Delivered from scratch a full-featured proprietary Symfony CMS for LibreSens.
- Delivered a Symfony CRM for fleet management and bodywork interventions.
- Delivered a Symfony CRM for an IT company.
- Delivered a Symfony CRM for client management and service tracking for a tech company.
- Delivered a Web App for managing and monitoring the autonomy of nursing home residents.
- Delivered a Web App for document management with a high security level.
- Delivered a reservation module with time slot management, SMS confirmation and 2FA.
- Delivered an Agency and Franchise management module with history and statistics.
- Delivered a job offers and applications management module compliant with GDPR.
- Delivered a categorized points of interest map module with search and filters.
- Delivered a hierarchical administrative directory for groups of local elected officials.
- Symfony & PHP
- Doctrine & SQL
- REST APIs & SSE Mercure
- Twig & Components
- Stimulus & UX Turbo
- VueJs
- Bootstrap & SCSS
- UX/UI Design
- NodeJs & ExpressJs
- CaddyServer, Apache, Nginx
- Docker & Plesk
- UbuntuServer
- Git, GitHub, GitHub Actions
- CI/CD
- Agile/Scrum & Project Management
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- BackEnd Developer - Apprenticeship contract @LibreSensAgen, France - On-siteMissions:
- Design and develop PHP and JavaScript features
Responsabilités:
- Remotely supervised by my educational tutor, in collaboration with the Product Owner and the team, based on the study of the specifications, I establish the design documents for the applications and/or features assigned to me, ensuring risk analysis and detailing/planning the different delivery phases from the MVP to the finished product.
Achievements:
- Creation of PHP/JS modules implemented in the company's CMS.
- Redesign, optimization and securing of existing modules.
- Design of themes according to the mockups provided by the design/integration department.
- Development of custom modules to implement client-specific features.
- Production deployment and monitoring of performance and security.
- PHP & JavaScript
- REST APIs
- CSS & SCSS
- Git & GitHub
- CI/CD
- Agile/Scrum & Project Management
Achievements
A selection of representative projects.This personal project is representative of a designer’s typical approach: analysis of a real need, technology choices under time constraints, architecture of a heterogeneous stack (Python, N8N, Mercure SSE), rapid delivery of an MVP followed by iterations. It attracted interest from regional press and radio.
- Automated collection of water levels across 15 stations (Hub’Eau API), continuous ingestion and normalization
- Trend analysis using linear regression on a sliding window
- Estimation of propagation delays through inter-station cross-correlation
- Multi-hop propagation: automatic upstream chain recovery if a station is unavailable
- Forecasts at 1h, 2h, 3h, and 6h with weighted confidence index
- Intelligent damping of local trends using upstream signals
- Forecast and confidence index degradation based on weather data and uncertainty
- Real-time interface via Mercure SSE with polling fallback
- Canvas 2D charts: 24h history and projections
- N8N orchestration, isolated Python computation, HTML and vanilla JS rendering
- UI action tracking for usage analysis
- UI/UX optimization based on collected data
- Legal compliance and GDPR (data minimization, no third-party tracking)
- Zero frontend framework: minimal, high-performance, and eco-responsible stack
Developed within the company, Edith is a proprietary Symfony CMS whose development from scratch was entrusted to me. It enables the LibreSens agency to respond to its clients' specific needs with agility in a controlled and secure environment. Designed to be flexible and performant, Edith integrates advanced content management, administration and SEO optimization features, and complies with accessibility and GDPR standards.
- Modular and extensible architecture for custom personalization
- Fully configurable from the administration panel
- Microservices for certain specific features
- Complete documentation and automated tests
- Custom pages, articles, events, FAQ
- Reusable and customizable content blocks
- Shortcodes integrable into any type of content
- Hierarchical content organization with drag and drop
- Content publishing with advanced media management
- Single or multilingual (fr, es, en, de, it, nl…)
- Complete URL translation
- Advanced roles and permissions management
- Compliance with accessibility and GDPR standards
- Integrated SEO optimization
- Optimized performance on client and server side
- Partial content reloading for performance and eco-design
- Reduced project development and maintenance time
Developed within the company, a B2C application for fleet management and technical intervention processes from vehicle intake to delivery. The application is used by the company's clients to track the progress of interventions on their vehicles in real time, and by technical teams to manage interventions and schedules.
- Advanced permissions management
- Client portfolio management
- Client vehicle fleet management
- Technical intervention progress management
- Customizable and historized client profile
- Fluid and performant administrator interface for technical teams
- Quote request system with 8-step guided client process
- Distinct workshop view for technical teams
- LOA contract end alerts
- Advanced search filters
- Eco-designed, accessible and fully secured
Carried out in a company, this web application is a management tool for a company in the IT sector.
- Contact and company management
- Product and category management (Doctrine Tree hierarchy)
- Customer order management - State workflow
- Management of equipment repair - State workflow
- Technical interventions management - State workflow
- Subscription and payment management
- Asynchronous SMS sending management instant +1h +4h
- PDF and QRCode creation management
- Action and modification history
- Automation of recurring tasks
- Advanced security and authorization management
- Data access optimization with DTO queries
- OCR implementation for scanned documents text recognition
- Security and performance optimization
Implemented at the core of the company's CMS as part of my apprenticeship contract, this project is a web application for managing and monitoring the autonomy of nursing home residents.
- Management of establishments, caregivers and residents
- Management and administration of health tests for residents
- Management of care assessment and required staff according to test results
- Management of medical equipment and required staff according to test results
- Management of the validity period of test results
- Management of return values depending on the characteristics of the residents
- Test purchase management for individuals, credits and history
- Statistics and reports on test results, staff and required equipment
- Follow-up history of statistics and reports
Documentation of my home server stack and the processes that keep it running. A personal reference that allows me to stay operational quickly — VitePress chosen for its lightness and simplicity. Public and consulted by other developers.
- Stack documented: Caddy, Mercure, N8N, Docker, SSH, shell scripts...
- Installation and security processes kept up to date
- Operational reference for fast and reliable interventions
- Public and consulted by other developers
- VitePress: a pragmatic choice for its simplicity and maintainability
- Progressively customized to fit my needs
Technologies
Education
Diplômes et Certifications
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Pro Title. Level VI - RNCP31678: Application Developer Designer.
France Compétences - Ministry of Labor -
Pro Title. Level V - RNCP37674: Web and Mobile Web Developer.
France Compétences - Ministry of Labor -
Bachelor of Fine Arts with Infographics option
National Education
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