AS400 Developer - IBM iSeries Platform
First seen by Alion on Oct 23, 2026.
About the Role :
We are looking for an experienced AS400 Developer with strong expertise in RPG development on IBM i platforms and a solid understanding of supply chain operations.
The role involves developing and maintaining RPG-based applications, enhancing order fulfilment and procurement systems, integrating external applications, and modernizing legacy code while ensuring performance, reliability, and compliance.
Responsibilities :
- Design, develop, test, and maintain RPG-based applications on IBM i (AS/400, iSeries) platforms.
- Lead enhancements and bug fixes for Supply Chain Systems (SDS), covering order fulfilment, purchase order processing, and transportation operations.
- Develop and integrate web services, JSON-based interfaces, and Web APIs to connect RPG applications with external systems.
- Translate business requirements into scalable, secure, and maintainable technical solutions.
- Analyze, debug, and document existing RPG code to support application modernization initiatives.
- Modernize legacy RPG code, including migration from RPG III to RPG IV, ILE, and Free Format where required.
- Perform root cause analysis, troubleshoot production issues, and optimize application performance.
- Collaborate with Product Owners, QA, and application and infrastructure teams to deliver end-to-end supply chain solutions.
- Maintain technical documentation, participate in code reviews, and prepare release notes.
- Ensure compliance with change management processes and PCI, PII, and SOX policies.
- Provide technical guidance and mentorship to junior developers.
Requirements:
- 7 - 10 years of experience in RPG development, with strong hands-on expertise in IBM i (AS/400, iSeries).
- Proficiency in RPG, CL, DDS, DB2/400, and service programs.
- Experience in application enhancement, legacy code analysis, debugging, and modernization.
- Strong performance tuning and troubleshooting skills.
- Experience integrating RPG applications with external systems using APIs, web services, and JSON.
- Strong understanding of supply chain processes, including order fulfilment, purchase order processing, and transportation operations.
- Knowledge of secure development practices, change management, and relevant compliance requirements.
- Strong analytical, problem-solving, and collaboration skills.
Skills
AS400, RPG, DB2, JSON, Webservices, iSeries, Performance Tuning