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Didier ErinDE

Didier Erin

Tech Lead Java | Reliable Craft & Delivery | Freelancer

€600/day
Bourdeaux, FR
15+ years

Average response time: 1 hour

Freelancer profile translated to English.
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About Didier

I am afreelance Java Tech Leadwith **15 years of experience**, including **7 years in technical leadership**.

I help teams **confidently deliver reliable and maintainable applications**, with **better visibility on costs and deadlines**.

My approach: applying modern engineering practices (testing, clear design, automation) to **transform delivery quality into concrete gains**.

I work in high-visibility or transition contexts:
  • Stabilizing and simplifying existing systems,
  • Accelerating delivery while controlling quality,
  • Guiding teams towards greater autonomy and technical rigor.
In contexts where software quality is a challenge, my interventions have led tosignificant reductions in development costsand **restored confidence in delivery**.

I favor clear, fluid, and human collaboration — with direct communication, clean deliverables, and a real results-oriented approach, while respecting contextual constraints.

I view each mission as a working partnership: understanding challenges, listening to needs, and building adapted solutions, within a framework of mutual trust.



Based in the Drôme region, I work remotely or in a hybrid model (depending on pace and distance).
Usual daily rate: €550/day excluding VAT (excluding platform commission)


  • French

    Native or bilingual

  • English

    Conversational

  • Spanish

    Basic

Can work on-site
Bourdeaux (up to 40km), Lyon (up to 10km), Marseille (up to 10km), Montpellier (up to 10km)

Experience

  • Alptis Assurances
    Tech Lead Java
    BANKING AND INSURANCE
    December 2024 - Today (1 year and 8 months)
    Lyon, France
    **Context**: Wholesale insurance broker (mutual and provident).

    **Role**: Java Tech Lead for health sales journeys.



    **Key Achievements**:


    • Design and development of two complete health sales journeys
    • Industrialization of delivery: reusable and automated model.
    • Significant reduction in development costs (approx. 70%) for the journeys.
    • Stabilization and maintenance of existing journeys.
    • Close collaboration with product, architecture, and operations teams.


    **Stack**: Java 21 · Spring 6 (Boot, Security, Web, Data) · MongoDB · Docker · GitHub Actions · SonarQube · Nexus · Gravitee · Rancher · Kibana · REST / microservices

    **Methods**: CI/CD · Clean Architecture · Pragmatic Testing

    **Setting**: Hybrid (1 day/week in Lyon)

    Java Spring boot Clean Architecture Docker API
  • Ensemble scolaire Saint-Louis (Crest)
    Java Trainer
    EDUCATION AND E-LEARNING
    May 2024 - June 2024 (1 month)
    Crest, France
    **Context**: Training provided as part of a Bachelor's degree in CIEL (Level 3).

    **Role**: Design and delivery of a 4-day module on modern Java development fundamentals.



    **Content**:
    • Object-oriented programming and Clean Code principles.
    • Introduction to Spring Boot and REST API.
    • Practical application through a mini-project inspired by Doctolib.
    • Transfer of professional development best practices.
    Course materials: https://github.com/ZandoliDev/doctocrest/blob/main/Introduction%20au%20d%C3%A9veloppement%20en%20Java.pdf

    Git repository (project base): https://github.com/ZandoliDev/doctocrest



    **Result**: 7 students trained in API design, object-oriented development fundamentals, and best practices


    Java Spring boot API Training Clean Code
  • Informatique CDC
    Java Tech Lead – Informatique CDC / Onepoint (Bordeaux – remote)
    CONSULTING AND AUDITS
    December 2021 - November 2024 (2 years and 10 months)
    Bordeaux, France
    **Context**: IT subsidiary of Caisse des Dépôts et Consignations (pension management).

    **Role**: Java Tech Lead for several teams (2 to 6 developers) on critical, high-visibility projects.



    **Key Achievements**:


    • Application stabilization and delivery reliability in a sensitive context.
    • Rewriting legacy modules and migrating from Java 8 to 21.
    • Automation of build and continuous integration processes (+60% to +70% time savings).
    • Technical coaching and support for teams.
    • Leading tech talks on TDD and refactoring (Spring Batch, Golden Master).


    **Results**: Restored client confidence and sustainable improvement in software quality.



    **Stack**: Java 8–21 · Spring Boot / Batch / Security · PostgreSQL · Oracle · Docker · Kubernetes · Jenkins · SonarQube · Kafka · Axway · REST / SOAP

    **Setting**: Full remote – Onepoint contractor

    java Spring Batch Docker TDD Leadership

Recommendations

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+1
Benoit Delebarre and 3 other people have recommended Didier

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Education

  • Master 2 MIAGE
    Polytech Lyon
    2010
    Spécialité : Aide à la décision

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