RPG Developer (Freelance) – SaaS ERP Platform Our customer, a growing SaaS provider based in Limburg, we are looking for a Senior RPG Developer to join on a long term, freelance basis. The organization develops and maintains a customer ERP tooling tailored to their clients industry, with a strong focus on stability, scalability, and continuous functional expansion. To support this roadmap, they are looking for an experienced RPG Developer to join the team on a long-term freelance basis, working in a mixed RPG / Java technology stack. Responsibilities Design, develop, and maintain ERP functionalities using RPG (IBM i / AS400) Contribute to the modernization and extension of existing ERP modules Collaborate with Java developers on integrations and hybrid solutions Analyze functional requirements and translate them into robust technical solutions Participate in bug fixing, performance optimization, and technical refactoring Work closely with functional analysts, product owners, and support teams Ensure code quality, maintainability, and documentation standards Profile Strong professional experience as an RPG Developer (RPG III / IV / ILE) Hands-on experience with IBM i / AS400 environments Experience in ERP systems or complex business applications Familiar with SaaS environments and multi-tenant platforms Additional Details Contract type: Freelance Location: Limburg (hybrid) Sector: SaaS / ERP software Technology stack: RPG (IBM i / AS400), Java Start date: Flexible