Taha Amine Z.

Your Java project should move your business forward. Stuck development, broken integrations, slow applications, or manual work? I build, fix, modernize, and automate what’s holding you back. With 14 years of Java, Spring Boot, and Angular experience, I help businesses turn complex requirements and troublesome systems into reliable, maintainable applications. My Upwork track record includes Top Rated Plus status and $100K+ earned. Whether you need to build a new platform, rescue a stalled project, connect your ERP to other systems, or improve an application your business already depends on, I can take ownership from investigation through delivery. Services I provide: - Custom backend development:Design and develop reliable Java/Spring Boot applications, REST APIs, and business workflows tailored to your requirements. - Full-stack web development:Build and maintain enterprise applications with Angular frontends and Java backends. - Legacy application modernization:Upgrade Java, Spring, and Angular applications, refactor existing code, and migrate monolithic systems toward modular or microservices architectures where appropriate. - API and system integration:Connect enterprise platforms and third-party services through REST/SOAP APIs, enabling reliable data exchange and reducing manual work. - Batch processing and data migration:Implement Spring Batch jobs for data imports, exports, transformations, and scheduled processing. - Database and application performance optimization:Investigate bottlenecks, optimize SQL queries and JPA/Hibernate data access, and improve application responsiveness. - Containerization and delivery automation:Package applications with Docker and establish CI/CD pipelines for repeatable builds and deployments. - Technical maintenance and troubleshooting:Diagnose production issues, resolve defects, and extend existing applications with new functionality. My core technical stack includes Java/JEE, Spring Boot, Spring Framework, Spring Batch, JPA/Hibernate, Angular, AngularJS, JavaScript, HTML5, CSS3, and Bootstrap. I work with MySQL, Oracle, and PostgreSQL, alongside Docker, Docker Swarm, Maven, Gradle, Git, Jenkins, GitLab CI/CD, Tomcat, and JBoss/WildFly. I work independently or alongside existing teams in Agile/Scrum environments, with a focus on understanding your business needs, communicating clearly, and delivering maintainable software. Whether you need a new application, an integration, or improvements to an existing platform, I can help turn your requirements into a practical technical solution.