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Rhay L.RL

Rhay L.

Systems Engineer

€400/day
Caen, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Rhay

Full Stack Developer and Software Architect with over 15 years of experience, I support companies in designing and deploying complex and sustainable applications.

My approach combines technical rigor from a solid background in software architecture with operational agility on modern stacks. I specialize in building performant and maintainable ecosystems, with particular expertise in:

Mobile & Web Front-end: Developing fluid and scalable applications with Flutter. I have a deep mastery of cross-platform development, enabling intelligent code sharing between mobile and web.

Back-end & Architecture: Designing robust and secure APIs with Node.js and NestJS. Passionate about monorepo architectures, I structure complex projects to ensure long-term maintainability.

Infrastructure & DevOps: Beyond code, I am proficient in industrializing deployment (notably via Coolify) and setting up Linux work environments (Fedora/Podman), ensuring continuous and reliable delivery.

My driving force is to transform complex business needs into simple, performant, and scalable technological solutions. Whether it's structuring a new architecture, evolving an existing project, or accelerating product development (particularly through monorepo approaches), I put my expertise to work for the success of your projects.

Main technical stack:

Frameworks: Flutter, NestJS, React.

Languages: TypeScript, Dart, Node.js.

Tools & Data: Supabase, Monorepo Architecture, Podman, Coolify.

I look forward to discussing your technical challenges and upcoming projects.
  • Portuguese

    Native or bilingual

  • Spanish

    Fluent

  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Caen (up to 50km), Paris (up to 10km)

Experience

  • Clariane
    Full Stack Developer
    MEDICAL
    October 2022 - September 2025 (2 years and 11 months)
    Paris, France
    - Design, documentation, development, and implementation of an HR system for internship management.
    - Development of new features, improvement, and maintenance of internal tools.
    - Installation, configuration, and use of SonarQube Community Server and Unit Tests (Backend), to create standardization (Design Pattern) for development and improve source code.
    - Use of several Node.js frameworks/libraries for development, Back and Front, such as Nest.Js, Express.Js, Next.js, Nuxt.Js, React (Redux, Query), among others.
    - Database migration
    - Containerization and deployment of applications - Azure Portal - DevOps
    - Use of Microsoft Azure for CI/CD, version control (Git), and agile project management (Scrum).
    - Use of ClickUp for project management.
    - Use of Figma/Trello for Kanban ticket management.
    - Use of Palantir Foundry for ETL creation and operation.
    Systems Engineer Palantir Foundry CI/CD Microsoft Azure Full-Stack Development
  • Clariane
    Full Stack Developer
    MEDICAL
    June 2022 - July 2022 (1 month)
    Paris, France
    Full-stack development, backend in Express, frontend in React and MaterialUi. UML diagrams and creation of the MySQL database. Version control: GitLab.
    I was responsible for developing a system for intern registration and internship agreements.
    React Query Fullstack Web Architecture Node.js Database
  • PCHelp Sistemas
    Integration Project Manager
    April 2014 - September 2016 (2 years and 5 months)
    Maringá, State of Paraná, Brazil
    Client support. Analysis of potential difficulties, possible "bugs" and proposing solutions based on the business plan or client needs, service provided online or in person. Attended client visits for training and implementation of versions and updates. For new clients, I handled integration, training, and implementation of the business plan in the ERP. I was also responsible for gathering client needs for new developments and handing over the project for these new needs to the responsible department. I was also responsible for new implementations for existing clients and for creating reports in SQL. Common routines included: Bug checks, training, testing, supporting the development of new routines, and especially training and implementing the tax-related part according to the company type and product classification, from purchase to invoicing.
    Project Management System Integration ERP Consultant IS Migration PostgreSQL

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Education

  • Diploma of French Language Studies (DELF)
    Diplôme d'études en langue française (DELF)
  • Manager in Software Architecture and Applications for Information Systems - BAC +5, Management and Software Architecture
    CESI
    2025
    Manager en architecture et applications logicielles des SI - BAC +5, Management et Architecture de Logiciel

Skill set

Categories

  • Other