You will participate in a project that modernizes one of T-Mobile's key systems from oldschool technologies and monolithic architecture to modern technologies built on microservices and containers. You will be involved in the design of technologies and the target architecture, you will drive this transformation. You will work with a team of people from the customer and a team from Ness, which implemented the original solution. You will be upgrading applications from Oracle Java to a higher version 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, OAuth2.