Java Developer (MQTT, ActiveMQ, Cassandra, J2EE, LDAP, SOAP, WebSphere, Spring Security, JWT)

Responsibilities

• Develop and enhance enterprise-grade backend applications using Java, Spring Boot, and microservices architecture.

• Build and integrate scalable REST and SOAP-based services for enterprise applications and system integrations.

• Implement asynchronous and event-driven application components using messaging technologies such as MQTT, Kafka, and ActiveMQ.

• Develop cloud-enabled backend solutions using AWS services, including serverless application components.

• Design and maintain applications deployed in containerized environments using Docker and Kubernetes.

• Develop data-access and persistence components using Java-based ORM technologies across relational and NoSQL database environments.

• Build solutions requiring integration with legacy enterprise platforms, including J2EE-based application environments and enterprise application servers.

• Implement secure application and API access using Spring Security, JWT, and LDAP-based authentication mechanisms.

• Develop automated build, testing, and deployment workflows using Jenkins and CI/CD practices.

• Collaborate on technical design, system integration, code reviews, performance improvements, troubleshooting, and Agile delivery.

Requirements

• 7+ years of professional experience in Java development, with strong hands-on expertise in Java and Spring Boot.

• Strong experience developing microservices and enterprise backend applications using Java.

• Hands-on experience designing and integrating REST and SOAP web services.

• Practical experience with event-driven or messaging-based systems, particularly MQTT, Kafka, or ActiveMQ.

• Experience with J2EE technologies, including concepts such as Servlets, JSP, JDBC, EJB, or equivalent enterprise Java technologies.

• Experience working with Cassandra or other NoSQL databases, together with relational database technologies such as Oracle, DB2, or MySQL.

• Hands-on experience with Docker and Kubernetes for application deployment and runtime environments.

• Experience with AWS services, preferably including AWS Lambda, S3, or EC2.

• Experience implementing application security using Spring Security, JWT, and LDAP.

• Experience with Jenkins and CI/CD automation.

• Experience in enterprise application servers such as WebSphere, WebLogic, JBoss, or Tomcat.

• Experience working in Agile/Scrum development environments.