Sr Mainframe Developer

*CLIENT INTERVIEW WILL BE IN-PERSON*

*Mainframe - CICS IS A MANDATORY SKILL*

Job title: Sr Mainframe Developer

Location: Jersey City, NJ (Onsite)

Term: Contract

Job Description:

• Design, develop, test, and maintain mission-critical banking applications using COBOL, CICS, JCL, DB2, and VSAM
• Build and support CICS online transactions for core banking functions such as account management, fund transfers, and loan processing
• Write and tune DB2 SQL queries, stored procedures, and perform explain plan analysis for high-volume financial data
• Create, maintain, and troubleshoot JCL batch jobs supporting end-of-day, end-of-month, and regulatory reporting cycles ·
• Diagnose and resolve production issues, system failures, and performance bottlenecks in a zero-downtime banking environment
• Conduct code reviews, enforce coding standards, and mentor junior developers
• Collaborate with business analysts, architects, and compliance teams across the full SDLC — from requirements to deployment
• Support mainframe modernization initiatives including integration with digital banking platforms and REST APIs
• Ensure all development adheres to banking regulations, audit controls, and security standards (SOX, PCI-DSS, FFIEC)
• Maintain thorough technical documentation including design specs, runbooks, and change management records

Job Requirements:

• 10+ years of hands-on IBM mainframe development experience, preferably in banking or financial services
• Expert-level proficiency in COBOL and CICS transaction programming
• Strong command of JCL, z/OS utilities (SORT, IDCAMS, IEBGENER), and batch processing
• Deep knowledge of DB2 — SQL optimization, bind/rebind, and performance tuning for large financial datasets
• Solid experience with VSAM file structures and access methods · Familiarity with REXX/CLIST scripting for automation ·
• Understanding of banking domain concepts — core banking, payments (ACH, SWIFT, Fedwire), GL, and reconciliation
• Exposure to mainframe-to-distributed integration (MQ, APIs, Web Services) is a plus
• Knowledge of DevOps for mainframe tools like Zowe, IDz, or DBB is highly desirable

Years of experience required: 8-10