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Theo LabarreTL

Theo Labarre

Senior Backend Engineer | Java & Oauth2 / OpenID

€730/day
Angers, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Theo

Senior Backend Engineer Java, I work on complex information systems where technical quality is a major challenge: REST API design, microservices architectures, distributed systems, and securing exchanges.

My areas of expertise include:

• Java / Spring Boot Development
• REST API Design and Security
• OAuth2, OpenID Connect, MFA, and Identity Providers (IdP)
• Microservices and Distributed Systems Architectures
• Data Consistency and Transaction Management in Complex Architectures
• Performance and Production Robustness Optimization
• Algorithm Design for Complex Business Problems

In my experience, I have participated in the development of identity platforms, strong authentication mechanisms, and backend solutions for the banking and insurance sectors, where security, availability, and compliance requirements are particularly high.

I appreciate demanding technical environments that require a strong component of architecture, security, and complex problem-solving. My goal is to design sustainable, maintainable, and scalable solutions adapted to the constraints of critical systems.
  • French

    Native or bilingual

Can work on-site
Angers (up to 30km)

Experience

  • CNP Assurances
    Java Designer / Developer
    June 2026 - Today (1 month)
    Angers, France
    - Contribution to a central customer repository (identity and data consistency)

    - Work on data quality and consistency

    - Java backend development in a high-constraint environment

    - Participation in understanding and evolving a complex existing system
    Java Spring Boot
  • Société Générale Assurances
    Java Study Engineer
    September 2022 - May 2026 (3 years and 8 months)
    Orléans, France
    - Design and development of critical backend applications in production

    - Participation in building several applications from scratch (approx. 10 applications, 4 databases)

    - Design and evolution of identity systems (Identity Providers)

    - Implementation of strong authentication mechanisms (MFA)
    Participation in the implementation of OAuth2 and OpenID Connect with authorization delegation

    - Architecture and development of REST APIs and microservices

    - Contribution to the evolution of a complex information system (convergence of business domains)

    - Production monitoring, performance optimization, and application robustness improvement
    Java Spring Boot OAuth2 OpenID Connect MFA Performance Optimization
  • AUSY
    Java Study Engineer
    June 2021 - September 2022 (1 year and 3 months)
    Orléans, France
    - Java backend development on a retirement savings business application in production

    - Participation in the design and evolution of features in a complex IS

    - Maintenance and improvement of a critical system used by client companies

    - Collaboration with business and technical teams in an Agile environment

    - Development of Angular frontend components
    Java Spring Boot Angular

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Education

  • Java / Spring / Angular Training
    AJC Formation
    2020
    Formation professionnelle intensive de 57 jours pour devenir ingénieur d'étude et développement.
  • Master 2
    Université Paris Diderot
    2019
    Physics of complex systems

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