IBM i (AS/400) RPG Developer/Administrator

Quantam Solutions provides IT solutions and consulting for various clients. We offer competitive hourly wages, health benefits, paid time off, and a 401(k) plan. We are currently seeking a AS400 Developer/Administrator.

Position Details:

• Duration: 12 months (high probability of extension)
• Location: Oklahoma City, OK. (Remote, rare onsite meetings)
• Work Schedule: Part-Time 20 hours per week (Remote)
• Interview: Virtual, 1 round

Overview:

Our client is seeking an experienced, high-caliber AS400 Developer/Admin for a long-term contract engagement. This critical resource will provide essential application maintenance, database management, and application-level administration services for OID’s core IBM AS/400 (IBM i Series) environment.

The underlying AS/400 hardware partition, operating system, and baseline infrastructure are fully hosted and managed by an external provider; this position does not require hardware or OS-level systems engineering. Instead, the contractor will focus on application development, software support, database management, and serving as the technical liaison to Ensono for environment-level modifications.

Responsibilities:

• 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.
• 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.
• 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.
• 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.

Qualifications:

• Minimum of five (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, collaborating with external hosting providers (such as Ensono) to resolve infrastructure or environmental issues.
• 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.

Nice-to-Haves:

• Direct experience assisting in legacy-to-cloud migrations or data warehousing extractions.
• Familiarity with modern IBM i tools, such as Rational Developer for i (RDi).
• Prior experience working in public sector environments or supporting insurance regulatory systems.