Siamak Mahdizadeh

Siamak Mahdizadeh | Lobox

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Member since: Jul 15, 2026

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Bio

Java Backend Engineer with nearly 9 years of experience building, maintaining, modernizing, and supporting enterprise software systems. Strong background in Java, Spring Boot, Spring Framework, REST APIs, Oracle, PostgreSQL, Spring Security, authentication platforms, and production support. Experienced in legacy modernization initiatives, enterprise application development, Java platform upgrades, backend architecture improvements, and business-critical systems in payroll, insurance, healthcare, and HR domains. Comfortable working across both legacy and modern environments while collaborating with technical and business stakeholders.

Experience

Developed and supported enterprise payroll, insurance, pension, debt management, housing, and organizational service systems. Contributed to centralized authentication and authorization solutions using Spring Security, JWT, and Oracle Database. Participated in modernization initiatives including Java 8 to Java 17 migration and Angular 11 to Angular 17 upgrade efforts. Delivered backend services using Java, Spring Boot, Oracle, PostgreSQL, MongoDB, Angular, and React. Mentored junior developers and interns and contributed to technical guidance within project teams. Worked on business-critical insurance and financial systems with high operational sensitivity. Developed and maintained healthcare and cancer-screening systems using Java, Spring Boot, Spring Security, JPA/Hibernate, React, and SQL Server. Implemented backend APIs and business workflows for electronic healthcare platforms. Provided production support, troubleshooting, and continuous improvements for operational systems. Collaborated in Agile environments using Jira, Asana, Git, and GitHub. Developed enterprise systems in HR, payroll, welfare services, equipment management, and organizational operations. Worked extensively with Java, Spring MVC, Spring Flow, Spring Security, JSF, PrimeFaces, Hibernate, and PostgreSQL. Built one of the organization's early Spring Boot-based personnel services used for cross-system data integration. Contributed to modernization efforts involving Spring Boot adoption, Java 21 migration, Keycloak integration, React infrastructure, and microservices-oriented architecture. Mentored junior developers and interns while participating in architecture discussions and production support activities. Contributed to projects expected to serve large organizational user populations with production troubleshooting experience.

Developed and maintained healthcare and cancer-screening systems using Java, Spring Boot, Spring Security, JPA/Hibernate, React, and SQL Server. Implemented backend APIs and business workflows for electronic healthcare platforms. Provided production support, troubleshooting, and continuous improvements for operational systems. Collaborated in Agile environments using Jira, Asana, Git, and GitHub.

Developed enterprise systems in HR, payroll, welfare services, equipment management, and organizational operations. Worked extensively with Java, Spring MVC, Spring Flow, Spring Security, JSF, PrimeFaces, Hibernate, and PostgreSQL. Built one of the organization's early Spring Boot-based personnel services used for cross-system data integration. Contributed to modernization efforts involving Spring Boot adoption, Java 21 migration, Keycloak integration, React infrastructure, and microservices-oriented architecture. Mentored junior developers and interns while participating in architecture discussions and production support activities.

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