Join a project that modernizes one of T-Mobile's key systems, transitioning from old technologies and monolithic architecture to modern microservices and container-based technologies. You will participate in designing technologies and the target architecture, driving this transformation. You will work with a team from the customer and the Ness team that implemented the original solution. Responsibilities include upgrading applications from Oracle Java to higher versions of OpenJDK, preparing applications for microservices and their operation in a Kubernetes cluster, migrating application servers from JBoss to WildFly, collaborating on the transition from Oracle DB to PostgreSQL, and ensuring security using SAML and OAuth2.