Mainframe Developer

Start Date: ASAP - 19/12/25
Contract Length: 3 months
Work Location: Remote
IR35 Status: Outside IR35

Join a critical public sector transformation project focused on decommissioning Legacy Mainframe systems.

Urgently seeking an experienced Mainframe Developer with strong ICL VME & Cobol skills to support the migration of essential services (including payroll) off Mainframe before an end-of-year deadline.

Key Responsibilities:

• Reverse-engineer and interpret ICL VME Mainframe applications written in Cobol
• Support the migration of codebases into Windows DLL equivalents
• Work with existing scripts to ensure functionality is retained and transitioned effectively
• Provide technical expertise in Legacy systems decommissioning
• Collaborate with internal teams to troubleshoot and validate transitions in a high-pressure, time-sensitive environment
• Assist in GNU-based IBM tooling if experienced

Skills & Experience Required:

• Strong hands-on experience with ICL VME Mainframe systems
• Strong expertise in Cobol, analysing and reworking Legacy business logic
• Understanding of Mainframe-to-modern transitions

Desirable:

• Experience with GNU on IBM environments
• Public sector experience