Mainframe Assembler Developer

Seeking two Principal Mainframe Assembler Developers for a contract role focused on leading a critical Fuel Pre-Authorization project, where the developers will modify low-level Mainframe Assembler code, support mainframe operations during cloud migration, and implement real-time transaction logic, all while working remotely. Key responsibilities Modify and develop low-level Mainframe Assembler (BAL) code for the 0120 automated fuel dispenser transaction Maintain and support ongoing mainframe operations to ensure business continuity during cloud migration Implement architecture changes for near-real-time transaction processing and ensure proper transaction reversals Required qualifications 15+ years of experience in Mainframe IBM Assembler (BAL) development Deep hands-on experience with the Connex switching/payment processing environment Proven expertise using Xpediter for mainframe debugging and troubleshooting Strong understanding of financial transaction messaging and automated fuel dispenser workflows Previous experience in environments undergoing mainframe-to-cloud migration is highly preferred