Mathieu Cretien

Long-term consulting activity with an e-commerce company, providing architecture, development, and consulting services.

I focus on designing pragmatic systems oriented towards growth, conversion, and operational efficiency.

» Complete redesign of an e-commerce platform with over 7,000 SKUs, enabling sustainable double-digit growth.

» Development of custom features for the catalog, inventory, checkout funnel, and marketing workflows.

» Implementation of AI solutions for product enrichment and data analysis, with business-side support.

» Multi-channel synchronization with marketplaces and social networks, expanding commercial reach and brand visibility.

» Optimization of payment and delivery paths to reduce friction and improve conversion rates.

» Implementation of CMS and page builder tools to accelerate content production.

» Integration of AI-based product recommendations, increasing engagement and average order size.

» SEO / GEO improvements and monitoring to support organic traffic growth.

» Design of a secure cloud infrastructure with zero-downtime deployments.

» Management of platform evolution over 9+ years, including Magento upgrades and migrations.

» Optimization of application layers, databases, and caches to improve performance and cost control.

Technologies: PHP, Magento 2, MySQL, Elasticsearch, Varnish, Ansible, AWS, New Relic, AI, skills=[SkillTranslatableContent(id=Magento, type=GLOBAL, name=Magento), SkillTranslatableContent(id=API, type=GLOBAL, name=API), SkillTranslatableContent(id=Amazon Web Services, type=GLOBAL, name=Amazon Web Services), SkillTranslatableContent(id=Ansible, type=GLOBAL, name=Ansible), SkillTranslatableContent(id=Elasticsearch, type=GLOBAL, name=Elasticsearch)]

Return to KaraFun Group to lead the modernization of search tools powering all of the group's products. Design and delivery of a performant, scalable, and resilient search solution, with no downtime under heavy load.

» Design of a shared search framework based on Symfony, used by over 7 platforms.

» Complete migration with backward compatibility and zero downtime in production under sustained traffic.

» Development of over 10 REST API endpoints integrating multi-entity aggregation, scoring algorithms, and result optimization.

» Modernization of APIs and request management to improve responsiveness, resource utilization, and overall stability.

» Strengthening of tests and profiling tools to improve quality and maintainability.

Evolution from Backend Developer to Lead Developer within the Merchandising & Customer Experience team, taking charge of backend architecture and the delivery of a luxury e-commerce platform operating in over 20 countries.

» Delivery of over 15 major projects, translating complex business needs into robust backend solutions.

» Technical lead of a team of 8, coordinating delivery with over 30 stakeholders in Europe and North America.

» Management of the platform's technical deployment to 10 new countries, with switchover and rollback strategies.

» Supervision and evolution of third-party integrations (PIM, WMS, ERP, CRM, social networks).

» Integration of a Unique Customer Reference (UCR) via bidirectional CRM synchronization.

» Deployment of AI-based product recommendations in the CMS and checkout process.

» Design of an automated merchandising pipeline for AI-assisted catalog ranking.

» Development of UX features compatible with stock flows, orders, pre-orders, and returns.

» Performance optimization through legacy refactoring and functional evolutions.

» Contribution to release management, cross-team code reviews, test improvements, and mentoring.