IBM i RPG Developer: Modernize & Integrate Apps

Jobtailor; Greater London; On-site; GBP 60,000 - 90,000; Full time

Job summary

Jobtailor in Greater London seeks an experienced IBM i developer to design, develop, test, and maintain business applications on the IBM i (AS/400) platform. You will analyze requirements, write RPG, CL, and SQL, and optimize DB2/400 access while collaborating with analysts, vendors, and users on system upgrades and modernization.

Focus is on delivering secure, compliant, and robust IBM i-based solutions, with opportunities to work across ERP/CRM integrations and web services.

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, Software Engineering, or related field, or equivalent work experience
• Willingness to learn and adapt to evolving IBM i technologies
• IBM or relevant professional certifications are advantageous
• Proven experience with ILE RPG, RPG IV, RPG Free, CL, and SQL
• Experience with DB2/400 database design and optimization
• Familiarity with DDS
• Familiarity with ILE concepts, including modules, service programs, and binding directories
• Familiarity with subfile programming
• Exposure to modernization tools such as RDi and VS Code for RPG is a plus
• Experience with API/web service integration is a plus
• Experience working with ERP or business-critical applications such as finance, manufacturing, or logistics systems
• Strong programming skills in RPG IV, ILE RPG, Free-Format RPG, CL, and SQL
• Solid understanding of the IBM i operating system, DB2/400, and DDS-based files
• Experience with change management tools
• Familiarity with RDi or other modern development environments
• Knowledge of APIs, web services, or data exchange formats such as JSON and XML

Responsibilities

• Design, develop, test, and maintain business applications on the IBM i (AS/400) platform
• Maintain and enhance existing IBM i applications to meet changing business needs
• Analyse, design, code, test, and implement programs using RPG on IBM i
• Develop and optimize CL programs, SQL queries, and data access routines
• Collaborate with systems analysts, business users, third-party vendors, and other developers to gather and refine requirements
• Perform system analysis and debugging to resolve production issues and improve performance
• Develop and maintain technical documentation, including program specifications and change logs
• Support integration between IBM i applications and enterprise systems such as ERP, CRM, and web services
• Participate in system upgrades, migrations, and modernization projects
• Ensure compliance with security, data integrity, and change management policies
• Provide user support and training for IBM i-based applications
• Document support ticket resolutions in the centralized IT knowledge base repository

Skills

ILE RPG

RPG IV

SQL

DB2/400

IBM i

Subfile Programming

API Integration

Change Management

Modernization Tools

RDi

Education

Bachelor’s degree in Computer Science, Information Technology, Software Engineering, or related field

Tools

RDi

VS Code

ERP Systems

CRM Systems

Web Services

Job description

Jobtailor in Greater London seeks an experienced IBM i developer to design, develop, test, and maintain business applications on the IBM i (AS/400) platform. You will analyze requirements, write RPG, CL, and SQL, and optimize DB2/400 access while collaborating with analysts, vendors, and users on system upgrades and modernization.

Focus is on delivering secure, compliant, and robust IBM i-based solutions, with opportunities to work across ERP/CRM integrations and web services.