FIS, a leading fintech company, is seeking a z/OS Mainframe Application Developer to join their team in Sydney, Australia. This role focuses on the development and maintenance of the P1C credit card issuing application, requiring expertise in mainframe technologies including COBOL, Assembler, and JCL. The position involves designing, developing, and testing enhancements to the P1C application, handling both scheme compliance updates and client-requested changes. The ideal candidate will have strong knowledge of DB2 and SQL, experience with z/OS performance tuning, and the ability to support multiple production instances globally. FIS offers a competitive benefits package and emphasizes innovation in fintech, personal growth, and an inclusive work environment. This role provides an opportunity to work with cutting-edge financial technology while contributing to systems that impact global financial operations. The position requires both independent work capability and strong team collaboration skills, with the possibility of providing support outside regular business hours for global operations.