Jocelyn Fournier
CEO & Founder at daphni
Vence, Provence-Alpes-Côte d'Azur, France
Summary
🤩
Rockstar🎓
Top SchoolJocelyn Fournier is a seasoned software leader and founder with over two decades of LAMP and database-focused experience, currently running Softizy to optimize application performance, infrastructure, and team workflows. He combines hands-on backend engineering—particularly MySQL tuning and system optimization—with executive roles as CEO, VP of Engineering, and CTO across high-traffic web platforms and startups. As a Senior Performance Consultant at PrestaShop and contributor to prominent open-source projects like PrestaShop and API Platform, he has a track record of hardening e-commerce systems, improving error handling, and resolving caching and header-length issues. Comfortable moving between C++ system work earlier in his career and modern PHP ecosystems, he brings rare depth in both performance engineering and product-scale operational practices. Based in Vence, France, he also has a history of building teams and products that were acquired by major publishers, reflecting both technical skill and entrepreneurial impact.
12 years of coding experience
19 years of employment as a software developer
Master of Science (MSc) Micro-electronics, Master of Science (MSc) Micro-electronics at Isep - École d'ingénieurs du numérique
English, French
Github Skills (22)
api-platform10
back-end-development10
ecommerce10
php-framework10
php10
api10
varnish10
symfony10
symfony-ux10
database-design9
error-handling9
rest8
configuration-management8
cms8
debugging8
Programming languages (17)
Github contributions (5)
PrestaShop/PrestaShop
Jan 2015 - Oct 2019
PrestaShop is the universal open-source software platform to build your e-commerce solution.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4 reviews, 463 commits, 144 PRs in 4 years 10 months
Contributions summary:Jocelyn primarily focused on improving the robustness and error handling of the PrestaShop e-commerce platform. Their contributions included fixing critical issues such as setting correct HTTP error headers, addressing potential vulnerabilities in configuration and backup processes, and ensuring proper cart and translation functionalities. Furthermore, the user refined code related to cookie management, making sure cookies are only set when their content is modified. Their work also shows a focus on ensuring correct data integrity within the platform.
ecommerceprestashopecommerce-platformcmsphp
api-platform/core
Apr 2017 - Mar 2020
The server component of API Platform: hypermedia and GraphQL APIs in minutes
Role in this project:Back-end Developer
Back-end DeveloperContributions:12 commits, 2 PRs, 21 comments in 2 years 11 months
Contributions summary:Jocelyn contributed to the API Platform core repository, focusing on enhancements and bug fixes related to the core functionality. Their work includes addressing strict typing exceptions, adding features to control header length in Varnish purges to prevent overflow, and incorporating code style fixes. The user's commits demonstrate a strong understanding of the project's architecture and its integration with caching mechanisms.
api-platformgraphql-apihypermediaapirest
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