Senior RPG Developer for IBM iSeries / AS400

At cloudatus, we help international enterprise customers design, migrate, modernize and support business-critical IT environments. We work across cloud, infrastructure, workplace, security, managed services and enterprise legacy systems.

We are looking for a Senior RPG Developer for IBM iSeries / AS400 to support one of our international customers in the manufacturing and distribution sector.

The role focuses on development, maintenance, modernization and troubleshooting of business-critical applications running on IBM iSeries / AS400. You will work with existing RPG-based systems, support integrations, analyze incidents and help improve the stability and maintainability of the application landscape.

Job description:

As a Senior RPG Developer for IBM iSeries / AS400, you will be responsible for developing and maintaining applications running on IBM iSeries. You will support both operational and project-based activities, including bug fixing, small enhancements, application analysis, technical documentation, integration topics and modernization initiatives.

This is a senior role for a person who understands legacy enterprise systems, can work independently and is comfortable communicating with technical and business stakeholders.

At cloudatus, you will: Analyse IBM iSeries applications, databases, interfaces, and dependencies

• Develop and maintain solutions using RPG IV, RPGLE, ILE RPG, Free-Format RPG, and CLLE
• Design and optimise Db2 for i database structures and SQL queries
• Diagnose complex application, database, integration, and system issues
• Analyse job logs, batch processes, queues, and performance bottlenecks
• Plan, test, implement, and document production changes
• Build and maintain integrations using REST, SOAP, JSON, XML, ODBC, JDBC, and file transfers
• Support integrations with ERP, CRM, finance, manufacturing, logistics, and sales systems
• Participate in automation, migration, and application modernisation projects
• Cooperate with customers, external vendors, and internal technical teams
• Provide advanced third-line support for critical incidents
• Required technical and professional expertise: Strong commercial experience with IBM iSeries / AS400 environments.

Strong hands-on experience with RPG / RPGLE / ILE RPG.

Practical knowledge of CL / CLLE.

Good knowledge of Db2 for i and SQL.

Experience with 5250-based applications and IBM i system commands.

Ability to analyze application logic, job logs, system messages and data issues.

Experience with file-based integrations, e.g. IFS, SFTP/FTP, CSV, XML.

Understanding of enterprise application support and production troubleshooting.

Ability to read, understand and safely modify legacy code.

English at minimum B2 level.

Nice to have:

Experience with free-format RPG or SQLRPG.

Experience with REST APIs, JSON, XML or middleware integrations.

Knowledge of RDi, VS Code / Code for IBM i or similar modern development tools.

Experience with ODBC/JDBC integrations.

Knowledge of DDS, Query/400 or legacy green-screen applications.

Experience in manufacturing, logistics, ERP, warehouse or SAP-integrated environments.

German language skills.

Non-technical requirements:

Strong analytical and problem-solving skills.

Ability to work independently in a remote support model.

Ownership mindset and responsibility for delivered changes.

Good communication skills with both technical teams and business users.

Ability to explain technical issues in a clear and structured way.

Attention to detail, especially when working with business-critical systems.

Readiness to work with legacy systems while supporting their gradual modernization.

Customer-oriented approach and ability to work in an international environment.

Benefits: B2B or employment contract Working with latest technologies Industry leading healthcare and comprehensive medical coverage (Luxmed, Multisport) Opportunities to enhance your qualifications (MS certifications, Udemy courses, etc.) Customizable 1-on-1 English or German lessons Modern computer equipment Opportunities to network and connect (get-togethers, team-building events) Employee referral programme Flexible working schedule Location:100% remote, occasional travel to customers around Europe. Take your expertise to new heights with cloudatus. Let’s write another customer success story together. Sounds like a fit? Let’s talk.