Julien Mercier-rojas
Senior Backend Data Engineer
Paris, Ile-de-France
Summary
👤
Senior🎓
Top SchoolJulien Mercier-rojas is a Senior Backend Data Engineer based in Paris with over a decade of hands-on experience industrializing web projects and guiding teams toward robust architectures, CI/CD and strong quality practices. With a 20-year background as a lead developer in PHP and broad exposure to microservices, DDD and CQRS, he combines practical coding experience with architectural vision to solve performance, security and scalability challenges. He has led migrations and integrations at scale—from designing asynchronous microservice platforms to implementing automated testing and quality controls—while coaching teams on Agile and DevOps practices. Julien blends consultancy and in-house roles, frequently delivering audit-driven roadmaps and migration plans that minimize disruption and accelerate delivery. An educator at heart, he consistently emphasizes team training and knowledge transfer alongside technical outcomes.
11 years of coding experience
14 years of employment as a software developer
MIAGe, MIAGe at Université Paris-SorbonneLicence d'informatique, Licence d'informatique at UVSQ Université de Versailles Saint-Quentin-en-Yvelines
English, German
Stackoverflow
21reputation
326reached
2answers
1question
Github Skills (113)
bundle10
git-hooks10
symfony10
cron-expression10
php10
composer-plugin10
unix9
pattern9
php-framework9
pmd9
uploader9
php-library9
phpmd9
docker-image9
filesystem9
Programming languages (9)
Github contributions (5)
Jeckel-Lab/easyadmin-notification-bundle
Dec 2019 - Aug 2020
Symfony Notification Bundle
Contributions:5 releases, 47 commits, 8 PRs in 7 months
symfony
Jeckel-Lab/Jeckel-Lab.github.io
Nov 2022 - Jun 2024
Jeckel-Lab website
Contributions:2 PRs, 76 pushes, 4 branches in 1 year 7 months
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