Oliver James is hiring a Mainframe Developer - Cobol - for our leading financial services client. We're looking for an experienced Mainframe Developer to support and enhance critical infrastructure. Key responsibilities include: Building new IMS/DB2 test environments Endeavour administration Masking IMS/DB2/VSAM files using Informatica Handling EMS support requests effectively Enhancing automation and service tools Exposure to MQ, CDC, Informatica is a plus Key skills: COBOL, REXX, ISPF, JCL, OPC IMS/DB2 database management Endeavour administration Development experience (batch and online) Familiar with tools like Fileaid, TSO, Xpeditor Understanding of storage management and database/file manipulation Exposure to UNIX/Windows systems is beneficial About: 2 days on site per week in Dublin required 6 month rolling contract €450-€500 per day Ideal candidates will have 5+ years in similar roles, strong troubleshooting skills, and experience working independently. Familiarity with Jira and Confluence is preferred. Apply directly or reach out to Skills: Mainframe developer Cobol jcl programmer Benefits: Work From Home