<p>Robert Half is seeking a <strong>Senior Mainframe / AWS Developer</strong> to support an established insurance and financial services organization. This role focuses on <strong>building APIs and integration layers to expose data from legacy mainframe systems</strong>, while supporting <strong>ongoing maintenance (KTLO) and new capability development</strong>.</p><p>This is <strong>not a cloud-first or large-scale modernization role</strong>. The mainframe remains the system of record, and AWS is used selectively to support integration and downstream capabilities. This is a <strong>contract-to-hire opportunity!</strong></p><p> </p><p><strong>Job Details</strong></p><ul><li><strong>Schedule:</strong> Core availability 9:00 AM – 3:00 PM PST</li><li><strong>Duration:</strong> Initial 4-month contract; contract-to-hire (3–6 month evaluation period)</li><li><strong>Location:</strong> Remote</li></ul><p><br></p><p><strong>Job Responsibilities</strong></p><ul><li>Develop, enhance, and maintain <strong>IBM mainframe applications</strong> supporting legacy insurance and retirement systems</li><li>Build and support <strong>APIs and integration layers</strong> to expose mainframe data and functionality to downstream platforms</li><li>Maintain and enhance <strong>COBOL-based systems</strong>, including batch processing and online transactions</li><li>Support <strong>KTLO (Keep the Lights On)</strong> work, production stability, and ongoing system maintenance</li><li>Design and implement <strong>AWS-based solutions</strong> as needed to support integrations and platform capabilities</li><li>Participate in technical design discussions to ensure system reliability, scalability, and long-term stability</li><li>Contribute to <strong>new capability development on top of existing legacy systems</strong> (not net-new policy platforms)</li></ul><p><br></p>