Senior Consultant - IBM iSeries / AS400

Job Description

As a Senior Consultant - IBM iSeries / AS400, you will ensure stable operation of business-critical systems running on IBM iSeries. You will diagnose incidents, analyze job logs and system messages, support batch processing, coordinate issue resolution with business and technical teams, and participate in change and improvement activities.

This role is ideal for a senior engineer or consultant who combines strong IBM iSeries operational knowledge with good communication, ownership and customer-facing experience.

Responsibilities

• Provide responsive and reliable production support for IBM iSeries / AS400 systems.
• Diagnose and resolve incidents related to applications, jobs, batch processing, integrations and system operations.
• Analyze job logs, system messages, spool files, output queues and application errors.
• Support business users and technical stakeholders during end-to-end issue resolution.
• Manage support tickets, prioritize tasks and implement short-term mitigations and long-term fixes.
• Support regular operational activities, including monitoring, data archiving, security reviews and audit support.
• Execute and document approved changes in the IBM iSeries environment.
• Support RPG / RPGLE / ILE RPG and CL / CLLE analysis where required.
• Work with Db2 for i and SQL for troubleshooting, data analysis and reporting support.
• Support file exchange and integration processes using IFS, SFTP/FTP and file-based mechanisms.
• Document technical findings, operational procedures and recurring issue patterns.
• Contribute to continuous improvement of support processes, monitoring and knowledge base.
• Cooperate with engineers, customer application owners and business users.

Required Technical and Professional Expertise

• Strong hands-on experience with IBM i / AS400 / iSeries environments.
• Experience in application support or system operations within enterprise environments.
• Good understanding of IBM i operational concepts: libraries, objects, subsystems, jobs, job queues, output queues and spool files.
• Ability to analyze job logs, system messages and application errors.
• Practical knowledge of CL / CLLE.
• Ability to read and understand RPG / RPGLE / ILE RPG code for troubleshooting purposes.
• Good knowledge of Db2 for i and SQL.
• Experience with 5250 terminal sessions and IBM i system commands.
• Experience with IFS and file exchange mechanisms such as SFTP/FTP/CSV.
• Understanding of IBM i security basics: user profiles, object authorities, authorization lists.
• English at minimum B2 level.

Nice to Have

• Experience with IBM i Access Client Solutions.
• Experience with backup/restore activities, BRMS, journaling or HA/DR concepts.
• Knowledge of RDi, Code for IBM i or modern IBM i tools.
• Experience with ODBC/JDBC, EDI, IBM MQ, REST/SOAP APIs or middleware integrations.
• Experience with system upgrades, data archiving, audit support or security reviews.
• Experience in manufacturing, logistics, ERP or SAP-integrated environments.
• German language skills.

Non-technical Requirements

• Strong ownership and accountability for production support topics.
• Ability to work independently under time pressure.
• Structured troubleshooting approach.
• Good communication skills with technical and non-technical stakeholders.
• Ability to manage priorities in an SLA-driven environment.
• Customer-oriented mindset.
• Attention to detail and strong documentation discipline.
• Readiness to cooperate with international teams.
• Ability to distinguish between workaround, mitigation and permanent fix.

Benefits

• B2B or employment contract.
• Working with latest technologies.
• Industry-leading healthcare and comprehensive medical coverage (Luxmed, Multisport).
• Opportunities to enhance qualifications, including MS certifications and Udemy courses.
• Customizable 1-on-1 English or German lessons.
• Modern computer equipment.
• Networking and connection opportunities, including get-togethers and team-building events.
• Employee referral programme.
• Flexible working schedule.
• 100% remote work, with occasional travel to customers around Europe.