Ahmad el-Morshedy

• Architected a multi-period VAT calculation engine to handle dynamic tax rates across complex billing cycles. • Engineered a B2B tax compliance automation system using polymorphic tax lookups and EU VIES integration. • Implemented JWT signature validation and callback actions for internal partners calls • Designed an event-driven callback architecture and built responsive enterprise billing dashboards using React and GraphQL. • Tech Stack: Ruby on Rails, GraphQL, React, Elixir

• Implemented our side endpoints for a synchronization project with MS calendar. • Tech Stack: Ruby on Rails, mySQL

• Worked on "Invoice Correction" epic. • Tech Stack: Kotlin, Spring, Golang, Nodejs

• Re-architected the massive open online course (MOOC) platform into a multi-tenant solution to serve distinctive websites from a single codebase • Designed/Implemented core LMS features including auto-certified courses, syllabus synchronization, and a custom payment gateway. • Implemented a secure EPUB encryption system for an online personalized library, ithraa.io to protect digital library assets. • Tech Stack: Ruby on Rails 4 & 5, PostgreSQL, Bootstrap, jQuery, Git, ionic 3

• Worked on an Arabic Job board System • Refactored a stolen car search helper to use trailblazer architecture • Tech Stack: Ruby on Rails, PostgreSQL, Bootstrap, jQuery, Git, Nodejs

• Contributed in the Implementation of an online classroom board using Angular Js & Paper.js

• Maintained Backend functionality • Implemented new features for Backend/Frontend • Maintained and Fixed python scrappy crawlers • Tech Stack: Ruby on Rails, Python Scrappy, Git, jQuery

• Design and implementation of web features and applications • Tech Stack: Ruby on Rails, jQuery, mySQL, ActionScript, Flex