Freelancer profile translated to English.
Back to original languageAbout Julien
Technical Architect and Lead Developer, I help organizations build scalable, robust, and sustainable software architectures while fostering a culture of technical excellence. With over 15 years of experience, I support teams in the design, industrialization, and modernization of complex systems.
I bring both a strategic and operational vision:
- Structuring technological choices to support product growth and performance.
- Mentoring and developing teams, establishing a culture of learning and quality.
- Leading technical transformations (cloud, CI/CD, security, data pipelines) with rigor and pragmatism.
🎯 My goal: to leverage architecture and technical leadership to serve a product with high technological and human value.
French
Native or bilingual
English
Conversational
Can work on-site
Marly-le-Roi (up to 50km)
Experience
- BelieveTech LeadENTERTAINMENT AND LEISURESeptember 2022 - Today (3 years and 9 months)Paris, FranceResponsible for the technical management of a microservices ecosystem dedicated to YouTube content management and monetization.Technical leadership of a mixed team (internal & external) on a high-performance distributed system.Some figures: 5 million YouTube videos, 10 million Kafka events per day, and a hundred internal users.Key achievements:- EDA Architecture: design and evolution of a set of Cloud Native microservices (Java/Spring Boot, Kafka, MongoDB, AWS → GCP).- Cloud Migration: leadership of the AWS->GCP migration.- Massive YouTube data synchronization (batch + real-time).- CI/CD and Observability: integration of automated tests, monitoring, and DevSecOps best practices.- Technical Leadership: mentoring, code review, functional/technical arbitration, skill development.
- Ministère de la JusticeTechnical ArchitectPUBLIC SECTORDecember 2018 - August 2022 (3 years and 8 months)Paris, FranceArchitecture and development monitoring for major projects (Portalis, PPN, SIAJ)Writing architecture documentsExpertise and consulting on application security (electronic vault, timestamping, encryption, signature...)Design, development, and project management of an inter-ministerial electronic signature solution (SIGNA)
- Capgemini Technology Services - FranceCyberSecu Architect ConsultantCONSULTING AND AUDITSSeptember 2017 - November 2018 (1 year and 3 months)Paris, France- Architecture and containerization of digital trust solutions.- Client support on development security and GDPR compliance.- Conducting security training for developers and project managers.
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Education
- Monetics and System SecurityEnsicaen2011Cette formation est rythmée par des périodes moyennes de 5 semaines. L'évaluation est continue et réalisée à chaque fin de période. Le programme développe les connaissances techniques, fonctionnelles et générales suivantes : - Langages de programmation - Algorithmiques & Génie logiciel - Systèmes & Réseaux - Sécurité - Monétique - Electronique - Mathématiques - Management