Yusuf Abdelaziz

Full-time, Remote · Dubai, UAE

• ▸Developed a charity system for a Kuwait-based charity platform called "Alturath", enabling seamless donation processing and resource distribution across 10+ countries via a scalable microservice architecture
• ▸Optimized database performance by refactoring bottlenecked SQL queries, reducing execution time from 6 minutes to ~150ms (2,400x improvement). Leveraged execution plan analysis, strategic indexing, and JPA Criteria API to restore real-time reporting capabilities
• ▸Integrated Apache Kafka for asynchronous event-driven communication between microservices, ensuring high availability and data consistency
• ▸Migrated multiple services from Java 8 and Spring Boot 2 to Java 21 and Spring Boot 3
• ▸Designed and implemented a multi-tenant architecture, transforming the platform into a SaaS solution with isolated data, per-client configuration, and automated onboarding

Part-time, Remote · Riyadh, Saudi Arabia

• ▸Shipped an end-to-end, real-time AML rule (Apache Flink + NestJS + GraphQL) that detects merchants exceeding expected annual income, with Kafka-driven runtime-configurable thresholds and comprehensive test coverage

Part-time · Minya, Egypt

• ▸Developed and deployed mobile apps using Flutter for a delivery service in two governorates (Minya and Sohag), resulting in over 40k combined installs
• ▸Enhanced the courier app to detect courier location, enabling assignment of the closest available courier to the nearest order
• ▸Implemented a logging setup for efficient debugging and better exception handling
• ▸Improved navigation performance of the client's mobile app by 81% when browsing food sections

Food Delivery System APIs

Java, Spring Boot, MySQL, Hibernate, Flyway, Jira

• ▸Architected a comprehensive backend REST API with Spring Security + JWT for stateless authentication and Role-Based Access Control (RBAC)
• ▸Engineered JWT authentication, dynamic menu management, complex order processing, and a flexible promotion system
• ▸Implemented region-based delivery fee calculation, real-time order tracking, and a post-delivery rating system
• ▸Designed a scalable architecture with scheduled background jobs for non-critical updates

Lango

Java

• ▸Created an object-oriented, dynamically-typed programming language in Java with main constructs: if statements, loops, functions, classes, and methods