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Jean-Baptiste DurandJD

Jean-Baptiste Durand

Dev Cobol and Java

€400/day
Paris, FR
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Jean-Baptiste

Hybrid DevOps & Mainframe profile, I work on critical z/OS environments (COBOL, DB2, JCL) while supporting the transition to modern cloud-native architectures (AWS, CI/CD, containerization, messaging). I am comfortable with both legacy IBM and Cloud DevOps tools (Docker, Argo, NATS...).
  • French

    Native or bilingual

  • English

    Fluent

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

Experience

  • AXA France
    Cobol Developer
    SOFTWARE PUBLISHING
    May 2025 - Today (1 year and 3 months)
    Nanterre, France
    Participation in the development and maintenance of critical applications on IBM mainframe (z/OS) for the insurance sector:

    Development and debugging in COBOL with DB2 and JCL, in a TSO/ISPF environment.

    Batch processing, file management (PS, PDS, VSAM), and monitoring via Endevor.

    Reading and adapting complex processing chains on z/OS.

    Rigorous approach focused on reliability, performance, and operational continuity.
    COBOL IBM Db2
  • inLive
    Cloud and Spring Boot Developer
    May 2024 - October 2024 (5 months)
    Perpignan, France
    Backend development of an event-driven platform in Java Spring Boot, with a DevOps component on the application infrastructure:

    Design of REST APIs with Spring Boot.

    Implementation of an asynchronous communication system with NATS JetStream.

    Continuous deployment via Argo CD.

    Containerization with Docker Compose and orchestration via Docker Swarm.

    Use of AWS services such as S3 for storage, Lambda for serverless processing, VPC for network isolation, and Application Load Balancer (ALB) for secure and scalable distribution of incoming traffic.

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Education

  • IBM Z Xplore - Concepts
    IBM Z Xplore - Concepts
  • Master of Computer Applications
    École 42
    2026
    Master of Computer Applications

Skill set

Categories