Senior Mainframe Developer

Overview

We have an ambitious goal to migrate a legacy system written in HLASM (High-Level Assembler) from the mainframe to a cloud-based Java environment for one of the largest banks in the USA.

Responsibilities

• Analyze, understand, and enhance the existing mainframe codebase (COBOL, JCL, CICS, DB2, IMS).
• Extract and transform business logic from mainframe systems for migration to a modern architecture.
• Troubleshoot, debug, and resolve issues within mainframe applications during migration.
• Collaborate with Java and client teams to ensure a smooth transition and accurate functionality replication.
• Provide knowledge transfer and documentation of mainframe components and processes.
• Mandatory work from the office 5 days per week.

Skills

Must have

• Proficiency in COBOL development and JCL (5+ years).
• Strong debugging, performance tuning, and problem-solving skills.
• Experience with CICS transactions and DB2 database programming.
• Solid understanding of mainframe batch and online processing.
• Experience working in distributed, global teams with US customers.
• Excellent communication skills for collaboration with client teams.

Nice to have

• Experience with IMS, VSAM, or HLASM.
• Familiarity with large-scale system migrations and modernization projects.
• Understanding of integration between mainframe and cloud-based systems.
• Prior experience in banking or financial services industry.
• Knowledge of automation tools for mainframe testing and deployment.