Mainframe Developer - IBM

We are seeking a seasoned Mainframe Developer to play a critical role in our enterprise database migration from mainframe systems to the AWS Cloud. In this role, you will investigate, analyze, and modify core legacy mainframe modules to create message queues, enabling seamless data redirection to the cloud via Enterprise Service Bus (ESB) services and modern APIs. While your primary expertise lies in deep mainframe development (COBOL, CICS, PL/I, DB2, JCL), you will collaborate closely with integration teams using IBM App Connect Enterprise (IBM ACE) to transform our tightly coupled legacy architecture into a modern, event-driven, cloud-ready ecosystem. Implementation Project Context The initial assignment involves a large, multi-year enterprise implementation focused on modernizing how core business and customer data is exchanged and governed across systems and digital channels. The program is replacing tightly coupled legacy integrations with a modern, API-first and event-driven architecture, delivering a set of enterprise-grade REST APIs, cloud-based integration services, and asynchronous messaging capabilities that form the backbone of the platform. This includes implementation patterns leveraging publish/subscribe messaging, event-driven architecture (EDA), and change data capture (CDC) to support near real-time propagation of customer and business data changes across enterprise systems. To facilitate this data redirection without disrupting core operations, the developer will investigate and modify mainframe batch modules and online environments to output to message queues. These queues will be consumed by ESB services and APIs to ensure near real-time, resilient, and secure data propagation to AWS. The integration patterns, messaging contracts, and refactored mainframe components you deliver will form the backbone of this migration and serve as blueprints for future transformation initiatives.