Senior Ruby on Rails Developer

Ahmad Hamza is a Senior Ruby on Rails developer with 10+ years of experience. He has extensive experience working with Toptal clients like Fullscript, where he built an unauthenticated storefront and an enterprise catalog-restrictions policy engine, and Desertcart, where he refactored a legacy Google Merchant Center disapproval system, significantly cutting CPU usage and runtime. He also contributed to the Toptal Core Team, developing a scalable architecture for an internal engineering-insights platform. Earlier experience includes an online casino platform and a team lead role at Cybage. He has made small contributions to OSS projects like Devise, CanCanCan, and Kamal. His side project, JustInvoicIt, is built with Rails 8 + Hotwire. He is looking for Senior/Staff Backend or Full-Stack Rails roles and is comfortable owning architecture, mentoring, and shipping end-to-end.