Senior IBM i (AS/400) Software Engineer

Low Housing Allowance - 2.625.000

Schedule: Monday to Friday 8:00 AM - 5:00 PM PST (or 9:00 AM - 6:00 PM PST

We are seeking a Senior IBM i (AS/400) Engineer to join a team responsible for supporting and evolving a mission-critical enterprise platform. This position requires deep expertise in IBM i technologies, RPG development, and DB2, along with the ability to work within complex legacy environments that support core business operations.

This is primarily a hands-on engineering role focused on application support, platform upgrades, troubleshooting, knowledge transfer, and long-term ownership of a mature IBM i ecosystem. The ideal candidate enjoys understanding complex systems, solving challenging technical problems, and working closely with teams responsible for maintaining business-critical applications

You’ll Be Working On Core IBM i Development

• Design, develop, and maintain applications written in RPG IV, ILE RPG, and CL
• Troubleshoot production issues across online and batch processing environments
• Enhance payroll, billing, deductions, and financial processing workflows
• Analyze existing application logic and implement new business requirements
• Support large-scale batch processing jobs and operational workflows

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Database Engineering

• Develop and optimize DB2 for i database solutions
• Write SQL queries, stored procedures, views, and database utilities
• Improve performance of high-volume transactional workloads
• Design and evolve database structures supporting payroll and billing operations
• Participate in database modernization efforts using modern SQL standards

Systems Integration

• Support integrations between IBM i applications and enterprise systems
• Maintain interfaces with JD Edwards and related financial platforms
• Investigate data flow issues across interconnected applications
• Assist in documenting integration dependencies and business processes

Modernization Initiatives

• Analyze legacy application architecture and business logic
• Participate in system decomposition and service identification efforts
• Assist with migration planning toward modern platforms and technologies
• Document business rules and operational workflows
• Collaborate with engineering teams building future-state solutions

Required Qualifications IBM i Development

• 5+ years of IBM i (AS/400, iSeries, IBM i) development experience
• Strong RPG IV / ILE RPG programming skills
• Experience developing and supporting CL programs
• Solid understanding of IBM i operating system concepts and object architecture
• Experience working with batch processing and job scheduling environments
• Familiarity with DDS-based physical, logical, display, and printer files

Database & SQL

• Strong SQL development skills within DB2 for i
• Experience optimizing queries and troubleshooting database performance
• Understanding of indexing strategies and access-path design
• Knowledge of transaction processing, record locking, and concurrency concepts
• Experience designing and maintaining production database structures

Engineering Skills

• Strong debugging and root-cause analysis abilities
• Ability to assess change impact across complex systems
• Experience supporting production-critical applications
• Strong written and verbal communication skills

Preferred Qualifications

• Experience with JD Edwards EnterpriseOne integrations
• Experience with service programs, binding directories, and activation groups
• Exposure to API integration patterns
• Experience modernizing legacy enterprise applications
• Familiarity with Java, C#, or modern backend development frameworks
• Experience working in payroll, accounting, financial services, or ERP environments
• Knowledge of DevOps, CI/CD, and source-control practices within IBM i ecosystems

Technologies You’ll Encounter

• IBM i (AS/400)
• RPG IV / ILE RPG
• CL
• DB2 for i
• DDS
• SQL
• JD Edwards EnterpriseOne
• IBM Access Client Solutions (ACS)
• Rational Developer for i (RDi)
• Git and modern development tooling

Sueldo: 1.711,65€ al mes

Ubicación del trabajo: Empleo remoto