Mainframe Developer

Crisil; Chennai District, Hyderabad; On-site; INR 1,500,000 - 2,100,000; Full time

Job summary

Crisil is seeking an experienced mainframe developer to design, build, and support mission-critical applications powering core banking transactions. You will focus on reliability, performance, and integration in an API-driven enterprise ecosystem.

With 7-10 years in mainframe development, you will work on COBOL, CICS, DB2, and JCL, drive batch processing and automation, mentor junior engineers, and collaborate with distributed teams to enable modernization.

Qualifications

• Core skills include COBOL, CICS, DB2, JCL with hands-on development.

Responsibilities

• Develop & enhance COBOL/CICS/DB2/JCL applications for core banking, payments, settlements, and reporting.

Skills

COBOL

CICS

DB2

JCL

Batch Processing

Debugging

Production support

Performance tuning

Tools

Control-M

CA7

Endevor

ChangeMan

File-AID

z/OS Connect

MQ

REST APIs

DevOps (mainframe)

Job description

Role Overview

Design, build, and support mission-critical mainframe applications powering high-volume core banking transactions. Drive reliability, performance, and integration of legacy systems within a modern, API-driven enterprise ecosystem.

Key Responsibilities

• Develop & enhance COBOL/CICS/DB2/JCL applications for core banking, payments, settlements, and reporting
• Maintain 24x7 production systems, ensuring stability in high-throughput environments
• Optimize DB2 performance (complex queries, indexing, stored procedures) to improve response time and scalability
• Troubleshoot production issues using Abend-AID, XPEDITER; perform root cause analysis and permanent fixes
• Automate batch pipelines using JCL and REXX; manage batch recovery and restart strategies
• Collaborate with distributed teams to enable API-led integration and modernization initiatives
• Participate in Agile ceremonies, conduct code reviews, and mentor junior engineers

Mandatory Technical Skills

• Core: COBOL, CICS, DB2, JCL (hands-on development)
• DB2 Expertise: Query optimization, stored procedures, performance tuning
• Batch Processing: Job control, scheduling, recovery handling
• Debugging: Abend-AID, XPEDITER
• Systems: High-volume transaction processing, regulatory reporting

Tools & Ecosystem

• Scheduling: Control-M, CA7
• Release Mgmt: Endevor, ChangeMan
• Data Tools: File-AID

Domain Expertise (Critical)

• Banking/Financial Services (payments lifecycle, settlements)
• Regulatory reporting systems
• High-availability, mission-critical environments

Important Capabilities

• Production support & incident management
• Root cause analysis and defect resolution
• Performance tuning & system optimization
• Batch failure recovery strategies

Modernization & Integration

• Integrate mainframe applications with API/microservices-based systems
• Exposure to cloud or hybrid modernization programs

Automation

• REXX scripting for operational efficiency
• JCL-based workflow automation

Soft Skills

• Strong stakeholder communication
• Agile collaboration mindset
• Mentoring and knowledge sharing

Experience

• 7-10 years in mainframe development
• Proven experience in large-scale banking systems handling high transaction volumes

Nice-to-Have

• Exposure to z/OS Connect, MQ, REST APIs
• Knowledge of DevOps practices in mainframe environments