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Matheo ZimmerMZ

Matheo Zimmer

DevOps Developer - Java / Spring Boot / Angular

€250/day
Nancy, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Matheo

Do you need a developer who can quickly take over a Java Spring Boot / Angular application, secure your deployments, or set up a clean CI/CD? This is exactly what I've been doing daily for 4 years at Harmonie Mutuelle (health insurance, +4M members), in an agile environment.

Specifically, I can offer you:
• Back-end Java / Spring Boot and front-end Angular / TypeScript development
• Setting up or improving CI/CD pipelines (Jenkins, GitHub Actions)
• Dockerizing and industrializing your deployments
• Managing and optimizing PostgreSQL databases
• Securing your code through automated tests (JUnit, Selenium, Cucumber)

What sets me apart: I don't just deliver code; I'm also accustomed to defining needs and technically overseeing a project – useful if you don't have anyone internally to supervise the mission. I also remain versatile on other stacks (Python, Node.js...): contact me to discuss feasibility, even outside of Java/Angular, and I'll honestly tell you if it's within my capabilities.

I am particularly comfortable with short and targeted missions: bug fixes, feature additions, CI/CD implementation, dockerizing an existing app, or optimizing a project already in production.

Available in the evenings and on weekends (apprenticeship ongoing until September 2027), 100% remote work.
  • French

    Native or bilingual

  • English

    Conversational

Remote only
Primarily works remotely

Experience

  • SYSTEMES INFORMATION HARMONIE MUTUELLE
    DEVOPS DEVELOPER / IT PROJECT MANAGER (MASTER APPRENTICESHIP)
    PRIVATE EQUITY
    January 2025 - Today (1 year and 7 months)
    Laxou, France
    Dual technical and management role on a Java Spring Boot / Angular application used by business teams. On the technical side: back-end and front-end development, PostgreSQL database management, CI/CD pipeline setup and maintenance (Jenkins, GitHub Actions), Docker containerization, with a particular focus on code maintainability and technical documentation of delivered changes.

    On the management side: gathering and formalizing requirements from business teams, scoping deliverables, facilitating agile rituals (sprints, dailies, retrospectives), and tracking progress through to production deployment. This dual expertise allows me to bridge the gap between business expectations and technical constraints, ensuring that what is delivered remains reliable and maintainable over time.
    Java Angular DevOps Project Management CI/CD
  • SYSTEMES INFORMATION HARMONIE MUTUELLE
    FULL-STACK DEVELOPER (BACHELOR APPRENTICESHIP)
    PRIVATE EQUITY
    January 2024 - January 2025 (1 year)
    Laxou, France
    Full-stack development on a Java Spring Boot / Angular application for internal business use, including designing new features on both the back-end and front-end. Management and evolution of the PostgreSQL database schema according to business needs. Implementation of application security measures with Spring Security. Participation in agile rituals and close collaboration with product teams to define deliverables.
    Front-End Development Back-End Development Agile Methodology deployment Spring Security
  • SYSTEMES INFORMATION HARMONIE MUTUELLE
    TNR-A DEVELOPER (BTS APPRENTICESHIP)
    PRIVATE EQUITY
    January 2022 - January 2024 (2 years)
    Laxou, France
    Automation of non-regression tests in Java with Selenium and Cucumber, to secure the application suite and production deployments. Design of test scenarios covering critical business workflows, analysis of detected anomalies, and structured reporting to development teams. Continuous improvement of existing scenarios to reduce test execution time and increase functional coverage.
    Java TNR Automation Cucumber Front-End Development

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Education

  • MASTER MAALSI (ongoing)
    CESI ENGINEERING SCHOOL
    MAALSI - Manager en Architecture et Applications Logicielles des SI. Formation d’ingénieur orientée architecture logicielle avancée, DevOps, cloud, automatisation et management de projets informatiques. Le cursus développe des compétences en conception d’applications complexes, sécurité, industrialisation, qualité logicielle et pilotage d’équipes techniques.
  • BACHELOR CDA
    CESI ENGINEERING SCHOOL
    2025
    CDA - Concepteur Développeur d’Applications. Programme spécialisé dans la conception et le développement full-stack, l’analyse des besoins, la gestion de bases de données et l’industrialisation logicielle. Couvre Java/Spring Boot, Angular, CI/CD, bonnes pratiques DevOps, qualité logicielle et méthodologies agiles à travers des projets concrets.

Skill set

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