Application Development AS400 Developer

Cogent Infotech Corp; Oklahoma City (OK); Hybrid; USD 90,000 - 130,000; Full time

Job summary

Cogent Infotech is seeking an experienced AS/400 Developer to support the IBM i environment under a 12-month contract in Oklahoma City. The role emphasizes application maintenance and development within a hosted infrastructure.

You'll work with RPG IV, RPGLE, CL, and SQL on DB2 for i, coordinating with the hosting provider and state IT leadership on data extraction, legacy logic documentation, and cloud migration efforts.

Qualifications

• Minimum of five years of hands-on AS400 (IBM i) development and support.
• Proficiency in RPG IV (ILE RPG), RPGLE, CL, and SQL on DB2 for i.
• Experience hosting in a hosted/managed AS400 environment.
• Experience in IBM i work management, subsystem coordination, application security, and user profile management.

Responsibilities

• Legacy maintenance and support for RPG-based applications.
• Coordinate with hosting provider for patching, backups, and environment changes.
• Manage application security, user profiles, and audit logs.
• Administer DB2 for i, tune queries and indexes.
• Assist with data extraction and cloud-migration readiness.

Skills

RPGLE

CL

SQL on DB2

Tools

SFTP/FTP

Job description

About Cogent Infotech

At Cogent Infotech, we believe in creating opportunities that empower individuals and transform organizations. With over 23 years of excellence in consulting and talent solutions, we pride ourselves on building inclusive workplaces and driving innovation in everything we do. Our diverse teams bring unique perspectives to help deliver cutting-edge solutions to global clients across both public and private sectors.

Job Details

Job Title: Application Developer
Contract Position: 12 Months
Location: Oklahoma City, OK Hybrid Onsite Role (Monday to Friday 20hrs/week)

Position Summary

The Office of Management and Enterprise Services (OMES), in coordination with the 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 OlD's core IBM AS/400 (IBM i Series) environment.

Because 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.

Additionally, the contractor will play a key role in assisting state IT leadership with database extraction, documentation of legacy business logic, and support for ongoing cloud migration and data archiving initiatives.

Key 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.

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)

Required Skills

• RPGLE, CL, and SQL on DB2
• SFTP /FTP

Highly Valued Skills (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.

Cogent Infotech is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment where everyone feels welcome and valued. We encourage applications from individuals of all backgrounds, identities, abilities, and experiences.