As400 Developer

AS400 Developer

Job Summary

We are seeking an experienced AS400 Developer to design, develop, maintain, and support business-critical applications on the IBM i (AS400) platform. The ideal candidate will have strong expertise in RPG programming, CL, DB2/400 databases, and IBM i system architecture. The role involves working closely with business users, analysts, and technical teams to deliver high-quality solutions that support enterprise operations.

Key Responsibilities

• Design, develop, test, and maintain applications on the IBM i (AS400) platform.
• Develop and enhance programs using RPG III, RPG IV, RPGLE, Free-Format RPG, and CL.
• Create and maintain database files, logical files, and queries using DB2/400.
• Analyze business requirements and translate them into technical solutions.
• Develop and support batch jobs, stored procedures, and interfaces with external systems.
• Perform code reviews, debugging, troubleshooting, and performance tuning.
• Create technical documentation, program specifications, and support manuals.
• Support production environments and resolve application issues within defined SLAs.
• Collaborate with cross-functional teams during system upgrades, migrations, and integrations.
• Follow established software development lifecycle (SDLC) and change management processes.

Required Qualifications

• Bachelor's degree in Computer Science, Information Technology, or related field.

• 3+ years of experience in AS400/IBM i application development.

• Strong experience in:

• RPG III

• RPG IV / RPGLE

• Free-Format RPG

• CL Programming

• Experience with DB2/400 database design and development.

• Knowledge of SQL, Embedded SQL, and Query/400.

• Strong debugging and problem-solving skills.

• Experience with source control and change management tools.

Preferred Qualifications

• Experience with ILE concepts and service programs.

• Knowledge of IBM i system administration fundamentals.

• Experience integrating AS400 applications with web services or APIs.

• Familiarity with modern IBM i development tools such as:

• Rational Developer for i (RDi)

• IBM ACS (Access Client Solutions)

• Experience in Manufacturing, Banking, Insurance, Retail, or Supply Chain domains.

• Exposure to modernization projects involving IBM i systems.

Technical Skills

Programming Languages

• RPG III
• RPG IV
• RPGLE
• Free-Format RPG
• CL/CLLE

Database Technologies

• DB2/400
• SQL
• Embedded SQL
• Query/400

IBM i Technologies

• IBM i (AS400)
• ILE
• Service Programs
• Job Scheduling
• Subfiles
• Journaling

Tools

• RDi (Rational Developer for i)
• IBM Access Client Solutions (ACS)
• TurnOver / Aldon (preferred)
• Git (preferred)

Soft Skills

• Strong analytical and troubleshooting abilities.
• Excellent communication and documentation skills.
• Ability to work independently and within a team environment.
• Strong attention to detail and commitment to quality.
• Ability to manage multiple priorities in a fast-paced environment.

Preferred Certifications

• IBM Certified Application Developer IBM i
• IBM Certified System Administrator IBM i
• IBM Professional Certifications related to IBM Power Systems

Sample Professional Headline

AS400 Developer | IBM i Specialist | RPGLE | Free-Format RPG | CL Programming | DB2/400 | SQL | Application Support & Modernization