IBM AS/400 Developer

qode.world

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

Posted 9/15/2026part-timeOklahoma City • Oklahoma • United StatesMid-LevelSenior💰 $50 - $60 per hourWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in AS400 application development and support, with a strong focus on RPG IV (ILE RPG), RPGLE, and SQL on DB2 for i. Proficient in managing application security, file transfer automation, and collaborating with external hosting providers.

Highest-signal resume keywords

RPG IV (ILE RPG)RPGLESQL on DB2 for iAS400 Application DevelopmentFile Transfer Automation

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

RPG IV (ILE RPG)RPGLEControl Language (CL)SQLDB2 for iApplication Security ManagementFile Transfer Protocol (FTP)Secure File Transfer Protocol (SFTP)Disaster Recovery TestingLegacy Application Optimization

Tools & Technologies

AS400 (IBM i, iSeries)Database UtilitiesJob SchedulersHosting Provider CoordinationEnvironmental Adjustments

Industry Keywords

Application DevelopmentUser Profile ManagementSubsystem CoordinationOperational Bugs TroubleshootingRegulatory Changes Compliance

Tech Stack

Tools & technologies

CloudSQL

About the role

Key responsibilities & impact

Maintain, modify, and optimize 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 application logic for regulatory changes, licensing requirements, and agency business process updates
Coordinate with the hosting provider on system maintenance, OS patching schedules, database utilities, and environmental adjustments
Manage application-level security configurations, user profiles, object-level authority, and QAUDJRN audit logs
Manage local job queues, active subsystems, and application-level job schedulers
Coordinate storage and backup operations, disaster recovery testing, and restoration verification
Query, manage, and tune DB2 for i databases, including SQL queries and indexes
Support secure automated SFTP/FTP transfers and interfaces with downstream state, regional, and partner systems
Cooperate with database administrators and cloud architects to extract, clean, and archive legacy tables
Document system flows, database schemas, and interdependencies for migration of legacy business logic to modern cloud systems

Requirements

What you’ll need

5 years of hands-on experience in AS400 (IBM i, iSeries) application development and support
Exceptional proficiency in RPG IV (ILE RPG), RPGLE, CL, and SQL on DB2 for i
Prior experience working in a hosted/managed AS400 environment and collaborating with external hosting providers
Proven experience in IBM i work management, subsystem coordination, application security, and user profile management
Strong background in file transfer automation (FTP, SFTP) and managing external integrations
Must be local to Oklahoma City, Oklahoma
Work authorization limited to USC or GC; no other visa considered

Benefits

Comp & perks

1-year contract
Part-time schedule of 20 hours per week
Hybrid work options