Freelancer profile translated to English.
Back to original languageAbout Zakariya
Senior Java Backend Engineer with 8 years of experience, including 6 years in highly regulated banking environments (BNP Paribas, Société Générale).
What I bring: Design and development of robust APIs and microservices in Java/Spring Boot, event-driven architecture (Kafka, RabbitMQ), and security (OAuth2, OIDC, JWT)
My concrete achievements:
- Migration of a Java 8 monolith to a Java 17 microservices architecture at Société Générale - used across multiple business lines
- Optimization of 9M+ MongoDB documents at Primonial — significant performance gains
- GDPR compliance through pseudonymization of sensitive documents
- Building complete CI/CD pipelines from architecture to production
Main Stack:
Java 8-21 · Spring Boot · Kafka · PostgreSQL · Docker · Kubernetes · GCP · OAuth2
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km), Lyon (up to 50km), Annemasse (up to 50km)
Experience
- ZataDevIndependent Full-Stack EngineerPUBLISHINGAugust 2023 - Today (2 years and 10 months)Paris, FranceEnd-to-end design and development of SaaS products autonomously.
- Java/Spring Boot APIs and microservices deployed on GCP (Docker, Kubernetes)
- Event-driven architecture with Kafka and RabbitMQ
- Secure authentication OAuth2, OIDC, JWT
- React/Next.js internal interfaces
- Full product lifecycle management: architecture → development → production
- Société GénéraleSenior Java Backend EngineerBANKING AND INSURANCEOctober 2019 - July 2023 (3 years and 9 months)Fontenay-sous-Bois, FranceMigration of a Java 8 monolithic platform to a Java 17 microservices architecture, used across multiple banking business lines.
- Decomposition of the monolith into independent services (DDD, domain separation)
- Optimization of CI/CD pipelines — significant reduction in build/deploy cycles
- Large-scale data migration via Spring Batch
- On-call support: Elasticsearch/Kibana log analysis, production incident debugging
- Mentoring junior developers
- Groupe PRIMONIALJava Backend EngineerBANKING AND INSURANCEFebruary 2019 - October 2019 (8 months)Paris, FranceIntervention on critical data management and banking integration systems.
- Optimization of 9M+ JSON documents in MongoDB Atlas
- Migration of 1.2M+ documents to a modern platform
- Development of 5 Spring Boot services consuming RabbitMQ
- GDPR compliance through pseudonymization of sensitive documents
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Education
- Computer Engineering Degree (Master's degree)EPITA: Engineering School in Computer Science2017Formation d’ingénieur en informatique à EPITA, spécialisée en développement logiciel, conception d’architectures, algorithmique, systèmes distribués et base de données. Alternance de 3 ans au sein de la DSI de l’École des Ponts, avec une forte expérience en développement web, gestion de projets SI et mises en production.