Freelancer profile translated to English.
Back to original languageAbout Yanis
Frontend Engineer with Fullstack experience | Specializing in React / TypeScript | Available for freelance
A passionate developer focused on user experience, I have over 5 years of experience in developing modern, performant, and maintainable web interfaces. My expertise centers on React, TypeScript, and SaaS platforms, with a solid understanding of product challenges, Agile cycles, and backend integration (Java/Spring Boot, Django, REST APIs).
🛠️ My background has enabled me to:
Design reusable UI components and scalable front-end architectures.
Participate in strategic projects in the industry (Dassault Systèmes) and energy (EDF).
Recently contribute to the development of a Process Mining SaaS platform (business log analysis, interactive graphs, AI).
Work in an agile environment (SAFe), CI/CD, code reviews, and close collaboration with product/design teams.
✅ Open to 100% remote or hybrid missions, preferably on React / TypeScript stacks with a true product vision.
💬 Let’s connect if you are looking for an autonomous, rigorous, and user-value-oriented freelance front-end developer.
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Lyon (up to 50km), Lille (up to 50km), Marseille (up to 50km)
Experience
- CAPGEMINILead Frontend DeveloperSOFTWARE PUBLISHINGJanuary 2025 - Today (1 year and 5 months)Meudon, FranceProject: TracePulseDevelopment of a Process Mining web platform from scratch, enabling the import of business logs, analysis via an AI layer, and dynamic visualization of processes as interactive graphs. Objective: to offer users visual understanding of their operational workflows.Responsibilities:• Leading frontend development within a multidisciplinary team.• Implementing the UI architecture in React/TypeScript with state management using Zustand.• Integrating graphs via React Flow and BPMN.js for process modeling.• Developing advanced and user-friendly front-end components with Tailwind CSS.• Collaborating with backend Python / AI teams for API structuring.• Maintaining a high level of code quality by rigorously applying clean code principles, modular architecture, and good separation of concerns to ensure a robust, readable, and easily maintainable frontend.• Contributing to the team's Agile organization (SAFe rituals, technical coordination).• Monitoring CI/CD pipelines with GitLab.
- Capgemini - Projet EDFFullstack Java / Reactjs DeveloperENERGY AND UTILITIESMay 2023 - January 2025 (1 year and 8 months)Paris, FranceProject: SWITCHAs part of the SWITCH program, EDF's digital transformation initiative for nuclear engineering, I participated in the customization and integration of the 3DEXPERIENCE platform to adapt it to the group's specific needs.This project is part of a global strategy to modernize EDF's digital tools, aiming to improve performance, traceability, and collaboration by replacing old internal tools with a unified, collaborative, and interoperable platform.Responsibilities:
- Developing modern user interfaces with React.js and Typescript.
- Designing and integrating backend services in Java / Spring Boot within a microservices architecture.
- Creating RESTful web services exposing clear, versioned, and documented APIs for frontend consumption.
- Participating in technical architecture decisions, in coordination with backend teams, to ensure scalability, separation of concerns between services, and overall system maintainability.
- Implementing unit and integration tests on the front (Jest, React Testing Library) and back (JUnit) ends.
- Conducting team code reviews, adhering to clean code and good architecture practices.
- Contributing to the team's Agile organization (SAFe rituals, technical coordination).
- Monitoring CI/CD pipelines with GitLab.
Technical environment: React.js, Typescript, HTML5, CSS3, Java, Spring Boot, Git, GitLab CI/CD, Jira, Confluence, Agile methodologies (Scrum/SAFe). - DASSAULT SYSTEMES,Frontend DeveloperSOFTWARE PUBLISHINGSeptember 2019 - January 2023 (3 years and 4 months)78140 Vélizy-Villacoublay, FranceProject: SwymInternal web platform used for managing well-being and performance initiatives within teams. This project aimed to provide a centralized interface for users to view, plan, and track various HR or managerial actions (team follow-ups, feedback, engagement indicators, etc.).Responsibilities:
- Developing several Dashboard modules:
• Creating interactive interfaces for visualizing team indicators.• Implementing filters, dynamic tables, and responsive graphical components.- Designing and implementing reusable React components:
• Developing an internal library of modular UI components (forms, modals, buttons, cards…).• Structuring code with TypeScript to ensure project robustness and maintainability.- Continuous improvement of code and test coverage:
• Adding unit tests with React Testing Library and Jest to secure future developments.• Progressive refactoring of certain modules to improve readability, performance, and maintainability.- Close collaboration with UX/UI teams:
• Integrating mockups provided by designers while respecting internal guidelines.• Participating in product discussions to adapt components based on user feedback and technical constraints.
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Education
- Master's in Industrial Engineering, specialization in Digital Product DesignUniversity of Paris 102018
- Professional Bachelor's in Industrial Innovation and Development.University of Paris 62016