About Julien
- Consulting and design of application architectures (microservices, CQRS, Event Sourcing)
- Redesign of existing applications
- Performance optimization
- Technical support and team skill development
- High value-added development
French
Native or bilingual
Experience
- Maline ImobilierLead Dev / ArchitectSOFTWARE PUBLISHINGApril 2022 - September 2025 (3 years and 5 months)Lyon, FranceAssisting the company in redesigning its IS and internalizing development.The applications (outsourced) had reached a point of blockage. A rewrite was decided, as well as the internalization of development teams, starting with the back-end. Upon my arrival, the work had begun, so I conducted an assessment between the requirements and what had been started. I then proposed a shift towards a Micro Service, CQRS, and Event Sourcing architecture. This allows for greater flexibility, facilitates the maintainability of business logic, while combating data inconsistency risks.I established the foundation of the solution and supported the skill development of the team (3 developers) for them to adopt the solution. I also acted as a code guarantor to ensure the implemented solution was sustainable, by setting up automated tests and conducting systematic constructive code reviews.I also took charge of certain developments:Management of data transfer between the two architectures.Optimization of certain processes.Implementation of monitoring to limit blind spots in code execution.Implementation of abstractions and optimizations to facilitate the use of the architecture.Optimization of massive data processing in SQL (from 48 hours to 8 hours of processing)Stack: PHP 8.1/8.3, Symfony 6/7, PostgreSQL, RabbitMQ, Redis, Behat, Docker.My role also led me to take on other responsibilities:Primary contact with: Front-end/SysAdmin/PO.Involvement in technical aspects for recruitment: defining needs, conducting technical interviews.Monitoring developers to facilitate their work while maintaining a high level of quality. Skill development.Monitoring and proposing areas for improvement: whether technical or product-related.
- FreelanceTechnical CoachDecember 2023 - December 2024 (1 year)Coaching developers in companies to help them progress and assist them with architecture design.
- OpenClassroomsMentorOctober 2020 - December 2023 (3 years and 2 months)Daily individual mentoring of students in their PHP and Symfony training programs.
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Education
- Symfony TrainingSensioLabs2013Formation Symfony 2
- Computer Science DegreeUniversity of Franche-Comté2002Licence Informatique