Arthur Mariet

At **Euro-Information**, the technological subsidiary of **Crédit Mutuel**, I had the opportunity to participate in the development of an application for **combating money laundering, fraud, and terrorist financing**. This project was of strategic importance to the group, as it aimed to strengthen financial security while complying with the strict regulations of the banking sector.

In this project,Cobolwas used to manage business logic and ensure communication with databases, whileC#was responsible for managing front-end functionalities. This separation of responsibilities allowed me to work on bothtechnical and functionalaspects, strengthening my skills in system integration and the development of effective user interfaces.

The scope of the project also allowed me tocollaborate with multidisciplinary teamsand enhance my skills in project management, complex problem-solving, and **adherence to security standards**. Working on a critical system for the group's security gave me a global perspective on technical challenges, while allowing me to contribute to an important and stimulating cause. It was an enriching experience both technically and professionally.

AtJustOneCard**, an innovative company specializing in **connected business cards**, I was responsible for the development and optimization of a **web and mobileapplication for communication and marketing services. This application provides companies with an overview of their employees' prospecting performance through ananalytical dashboard(statistics on business card usage, engagement rates, interactions, etc.).

I developed a completeBackOfficeallowing administrators to manage users, customize profiles displayed during sharing viaNFC or QR Code**, and track campaign performance in real-time. The interface was designed to offer a fluid and intuitive user experience, incorporating **UX/UI optimizationsfrom in-depth work on Figma.

On the technical side, the application is based onReact.js / React Nativefor the front-end,Node.jsfor the back-end, andFirebaseas backend-as-a-service. I also implemented automatedCI/CDwith GitHub Actions to optimize deployment and maintenance. In parallel, I worked onSEO optimizationto improve the platform's visibility.

UsingJavaScriptand its associated frameworks, I designed and implemented interactive and performant solutions,ensuring an optimized user experienceand continuous delivery of updates.

AtAliae**, I contributed to the development of a conversational artificial intelligence **for patient monitoring in clinical trials**. This project combined digital health and natural language processing aspects, primarily using **Pythonwith the Django framework for the backend andReact.jsfor the frontend. This experience allowed me to strengthen my FullStack development skills while immersing myself in the digital health field.