Senior AS/400 COBOL Developer

• 15+ years of hands-on AS/400 (IBM iSeries) development experience.
• Strong expertise in:
• AS/400 (IBM iSeries)
• COBOL/400
• RPG/RPGLE
• DB2 on IBM i
• SQL Development and Performance Tuning
• Extensive experience supporting and modernizing legacy enterprise applications.
• Strong troubleshooting and production support experience in batch and interactive applications.

Job Summary

We are seeking a highly experienced Senior AS/400 COBOL Developer with 15+ years of expertise in IBM iSeries application development and support. The ideal candidate will be responsible for developing, maintaining, and modernizing business-critical AS/400 applications while providing deep technical leadership across legacy systems and modernization initiatives.

This role requires extensive experience in COBOL, RPG/RPGLE, DB2 databases, SQL optimization, batch processing, and enterprise application support within IBM i environments.

Required Skills

IBM i / AS400 Technologies

• AS/400 (IBM iSeries)
• IBM i Operating System
• COBOL/400
• RPG
• RPGLE
• CL Programming
• IBM i Development Tools

Database Technologies

• DB2 on IBM i
• SQL Development
• Advanced SQL Queries
• SQL Performance Tuning
• Database Design
• Data Modeling
• Query Optimization
• Database Troubleshooting

Application Development & Support

• Legacy Application Development
• Enterprise Application Maintenance
• Batch Processing
• Interactive Applications
• Production Support
• System Integration
• Code Enhancement
• Defect Resolution

Development Methodologies & Tools

• Agile Methodologies
• Scrum
• Kanban
• CI/CD Processes
• IBM i Deployment Processes
• Version Control
• Technical Documentation

Productivity Tools

• Microsoft Office Suite
• Documentation Tools
• Office Productivity Applications

Key Responsibilities

Application Development & Maintenance

• Develop, maintain, and support business-critical AS/400 applications.
• Design and implement solutions using:
• COBOL/400
• RPG
• RPGLE
• DB2
• SQL
• Enhance existing applications and develop new functionality as required.
• Ensure application stability, performance, and maintainability.

Database Development & Administration

• Design and maintain DB2 database structures and data models.
• Develop and optimize complex SQL queries and programs.
• Analyze and resolve database performance issues.
• Implement best practices for data integrity and database performance optimization.

Batch & Interactive Application Support

• Analyze, debug, and resolve complex issues involving:
• Batch Processing Systems
• Interactive Applications
• Production Incidents
• System Performance Problems
• Perform root cause analysis and implement long-term solutions.
• Ensure business-critical applications remain highly available and reliable.

System Modernization & Integration

• Collaborate with modernization teams to integrate AS/400 applications with distributed and modern platforms.
• Support application modernization and migration initiatives.
• Design integration solutions between legacy and contemporary systems.
• Participate in architectural discussions and technology transformation efforts.

DevOps & Delivery Processes

• Support continuous integration and deployment processes within IBM i environments.
• Participate in Agile delivery methodologies including:
• Scrum Ceremonies
• Sprint Planning
• Daily Standups
• Kanban Workflows
• Support release management and deployment activities.

Documentation & Knowledge Sharing

• Create and maintain:
• Technical Documentation
• System Design Documents
• Database Documentation
• Support Procedures
• Operational Runbooks
• Provide technical mentoring and knowledge transfer to team members.
• Support documentation and compliance initiatives.

Required Qualifications

• Bachelor''s Degree in:
• Computer Science
• Information Technology
• Engineering
• Related Technical Discipline
• Equivalent Professional Experience
• 15+ years of hands-on experience in:
• AS/400 (IBM iSeries)
• COBOL/400 Development
• RPG/RPGLE Development
• DB2 Database Development
• SQL Programming
• Legacy System Support
• Strong expertise in:
• IBM i Architecture
• Batch Processing Systems
• Interactive Applications
• Database Design and Optimization
• Production Support and Troubleshooting
• Proven experience integrating legacy systems with modern enterprise applications.
• Experience working within Agile development environments.
• Excellent analytical, problem-solving, and communication skills.

Preferred Qualifications

• Experience leading legacy modernization initiatives.
• Experience integrating AS/400 applications with APIs and distributed systems.
• Knowledge of IBM i DevOps and CI/CD tools.
• Experience within highly regulated enterprise environments such as:
• Banking
• Insurance
• Manufacturing
• Healthcare
• Retail
• Experience mentoring development teams and providing technical leadership