Kareem M.

Need a senior Java engineer who can quickly understand your system, deliver production-ready code, and make sound architectural decisions when needed? I have 15+ years of experience building enterprise-grade backend systems using Java and Spring Boot. Whether you're launching a new application, extending an existing platform, modernizing legacy code, or improving performance, I can help deliver reliable, maintainable solutions. On Upwork, I've successfully completed 100+ projects while maintaining a 100% Job Success score. I value clear communication, pragmatic decision-making, and writing clean code that's easy for teams to maintain long after delivery. I can help with: - Java & Spring Boot application development - REST API design and integration - Backend architecture and system design - Microservices and monolith modernization - Performance optimization and troubleshooting - Database design and optimization - Code reviews and technical mentoring Core technologies: Java • Spring Boot • Spring Security • REST APIs • JPA/Hibernate • PostgreSQL • Oracle • SQL Server • MySQL • Microservices • Maven • Git If you're looking for a senior engineer who can contribute immediately, communicate clearly, and deliver production-ready software, I'd be glad to discuss your project.