Senior Mainframe Developer

Project description

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

• We are looking for an experienced Mainframe Developer who can support the migration of the client platform:

• Analyze, understand, and enhance existing mainframe codebase (COBOL, JCL, CICS, DB2, IMS).

• Extract and transform business logic from mainframe systems for migration to modern architecture.

• Troubleshoot, debug, and resolve issues within mainframe applications during migration.

• Collaborate with Java and client teams to ensure 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.