Abdelmadjid M.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I’m a Java backend engineer with 6+ years of experience designing and building scalable backend systems using the Spring ecosystem. I specialize in developing robust APIs, microservices, and cloud-native applications that power modern web platforms. My focus is on writing clean, maintainable, and high-performance backend code while following best engineering practices such as SOLID principles, clean architecture, and test-driven development (TDD). Certifications: ✅ Oracle Certified Associate Java 8 ✅ Spring Certified Professional Backend expertise: • Java (modern versions up to Java 25) • Spring Framework, Spring Boot, Spring MVC, Spring Security • Microservices architecture and REST API design • ORM (Hibernate), Spring Data JPA • SQL and NoSQL databases (PostgreSQL, MySQL, Oracle, MongoDB) • Backend performance optimization and concurrent systems Cloud & DevOps: • Kubernetes deployments • Helm Charts • GitOps workflows using ArgoCD • Cloud infrastructure experience with GCP • Maven and CI/CD workflows Other technologies: • GitHub / GitLab • JasperReports • PHP / Laravel (previous experience) Frontend experience (when needed): • Angular, TypeScript, JavaScript • HTML5, CSS3, Bootstrap • Thymeleaf I’m comfortable working across the full development lifecycle, from system design and implementation to testing, deployment, and production support. If you're looking for a developer who can design reliable backend services and scalable APIs using Java and Spring Boot, feel free to reach out. Looking forward to collaborating with you!