Java 21+, Spring, Spring Boot, SOLID principles, OOP REST APIs, functional and reactive programming Git, Maven, Eclipse/IntelliJ SQL Server, Spring Data, Hibernate Docker, Kubernetes, CI/CD (Azure DevOps/TFS) Messaging systems: ActiveMQ, Kafka Frontend tech: JavaScript, jQuery, JSP, Vue.js, React/Angular2 Java EIP frameworks: Apache Camel, Spring Integration NoSQL, Graph DBs, ElasticSearch Agile (Scrum/Kanban), secure coding, logging/auditing At least 1 year experience in biometric and identity management