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 • 8+ 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/or 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.