Sr. Mainframe Developer

QAT Global, a US-based IT consulting firm with more than 30 years in the market, is hiring aSr. Mainframe Assembler & COBOL Developerto join an international project supporting a US client in the life insurance industry. This professional will work directly with client stakeholders in the US and collaborate with distributed teams across Brazil, Costa Rica, and the United States, contributing to the maintenance, enhancement, and migration of critical mainframe-based insurance administration systems.Main Challenges:Maintain and enhance legacy mainframe systems written inAssembler and COBOL, working with VSAM file structures Support and develop applications on the Ingenium platform (COBOL/DB2) Troubleshoot and resolve production issues across multiple mainframe environments Support ongoing data extraction and migration efforts toward a third-party administrator (TPA) Collaborate with cross-functional teams to ensure system reliability, performance, and continuity Provide knowledge transfe...