AS400 Developer

Key Responsibilities

1. Legacy Application Maintenance & Support

Maintain, modify, and optimize custom legacy application code written in RPG, RPG III, RPG IV (ILE RPG), RPGLE, and Control Language (CL).

Investigate and troubleshoot operational bugs, batch run anomalies, and user-reported system issues.

Update existing logic to adapt to regulatory changes, licensing requirements, and agency business process updates.

2. Application Administration & Infrastructure Liaison

Serve as the primary technical point of contact to coordinate with the hosting provider for system maintenance, OS patching schedules, database utilities, and environmental adjustments.

Manage application-level security configurations, including user profiles, object-level authority, and verify system audit logs (QAUDJRN) to maintain system integrity. Manage local job queues, active subsystems, and application-level job schedulers.

Coordinate with Ensono's storage and backup operations teams to ensure application backup windows, disaster recovery testing, and restoration verifications are carried out successfully.

3. DB2 Database & Integration Management

Query, manage, and tune DB2 for i databases, optimizing SQL queries and indexes to ensure database responsiveness.

Support secure, automated file transfers (SFTP/FTP) and interfaces between the hosted AS400 partition and downstream state, regional, or partner systems.

4. Modernization & Migration Enablement

Cooperate with state database administrators and cloud architects to extract, clean, and archive legacy tables.

Document system flows, database schemas, and interdependencies to facilitate a seamless transition of legacy business logic to modern cloud systems.

Requirements

Experience: Minimum of five (5) years of hands-on experience in AS400 (IBM i, iSeries) application development and support.

Programming Skills:

Exceptional proficiency in RPG IV (ILE RPG), RPGLE, CL, and SQL on DB2 for i.

Hosting Coordination: Prior experience working in a hosted/managed AS400 environment, collaborating with external hosting providers to resolve infrastructure or environmental issues.

Application Administration: Proven experience in IBM i work management, subsystem coordination, application security, and user profile management.

Data Integration: Strong background in file transfer automation (FTP, SFTP)