Main hands-on developer of a Magento 1.9 → 2.4 migration and the 2.4.0 → 2.4.6 upgrade with PHP 8.2 for a US B2B/B2C retailer. CSP rollout from report-only to enforced, fixes for CSRF and path-traversal findings, 1,500+ merged pull requests. Adobe Certified Expert, Commerce Cloud Developer.