Freelancer profile translated to English.
Back to original languageAbout Julien
Backend & DevOps Developer with 10 years of experience, I support you in modernizing your information system and ensuring the reliability of your deployments. My core business: evolving aging technical foundations towards recent, maintainable, and resilient architectures, without service interruption.
Concretely, I handle the migration of your applications (Mule → Apache Camel, Java 8 → 17), the redesign of your CI/CD pipelines (GitLab-CI, end-to-end tests), the automation of your deployments (Ansible, Docker, AWX), and the management of your large-scale data flows (Kafka, Apache NiFi, Elasticsearch/Kibana).
My added value: a dual Backend (Java/Spring Boot) and DevOps skill set that allows me to intervene end-to-end, from code to production, by industrializing what I build — reusable pipelines, standardized deployments — to save the entire team time. Accustomed to critical environments (Club Med, ENGIE Solutions), I manage sensitive migrations, support teams, and work in Scrum cadence (PSM1 certified).
English
Native or bilingual
French
Native or bilingual
Can work on-site
Paris (up to 50km)
Experience
- CLUB MEDBACK-END / DEVOPS DEVELOPERHOSPITALITYApril 2023 - Today (3 years and 2 months)Paris, France• o Migration of Mule Software applications to Apache Camel: Redesign of about ten applications initially developed in Mule (Java 8) to evolve them to Apache Camel with Java 17, in order to modernize the technical foundation, improve maintainability and reliability.• o Participation in non-regression tests and monitoring to ensure functional stability. Realization of all functional and technical evolutions on migrated and non-migrated applications.• o Automation with Ansible Collections: Migration of applications to Ansible Collections to standardize and simplify deployments.• o Redesign of Clubmed PMS CI: Complete redesign of the continuous integration pipeline to ensure deployment reliability and integrate end-to-end tests.• o Support for teams on GitLab-CI: Assistance to teams for the implementation and optimization of GitLab-CI pipelines.• o Creation of reusable CI templates via Ansible Collections: Development of generic and modular pipeline models to facilitate reuse across different projects and applications.• o Elasticsearch/Kibana version upgrade and architecture migration: Update to recent versions of Elasticsearch and Kibana, accompanied by an architecture migration to optimize system scalability and resilience.
- ENGIE SOLUTIONSBACK-END / DATA DEVELOPERENERGY AND UTILITIESNovember 2020 - April 2023 (2 years and 5 months)Paris, France• o Development and maintenance of data flows on Apache Nifi to ensure reliable interconnection of clients and systems.• o Maintenance and optimization of Kafka and NiFi infrastructure, including supervision, incident management, and continuous improvement.• o Support for Business Analysts in writing specifications.• o Development and maintenance of data flows on Apache Nifi to ensure reliable interconnection of clients and systems.• o Development of a Java application to automatically control the quality, conformity, and best practices of NiFi flows.• o Version upgrade and migration of this service to AWS by implementing storage service via OpenSource MinIO.• o Devops: Progressive deployment of services via Ansible and the AWX graphical interface / Modification of YAML scripts that enable pipeline deployment via GitLab CI.• o (Bash / Shell) that enables pipeline deployment via Go CD.• o ScrumMaster: passing the PSM1 certification.
- OXYLFULLSTACK DEVELOPERE-COMMERCESeptember 2017 - March 2020 (2 years and 6 months)Paris, FranceDevelopment of Computer Database, a CRUD application exposed via web services, including a web application (React) and a command-line interface.
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Education
- JRO
- Generalist Engineer DiplomaPolytech2017Diplôme d'Ingénieur Généraliste