Senior AS400 Developer/Technician

Description

Job Summary: We are seeking a Senior AS400 Developer/Technician for a strategic technological migration project to SAP, involving analysis of legacy systems and proposal of efficient solutions. Key Highlights: 1. Strategic technological migration project to SAP 2. In-depth analysis of legacy systems and architecture 3. Autonomy to propose efficient and scalable solutions DESCRIPTION A Senior AS400 Developer/Technician is required to join a strategic technological migration project from the IBM i (AS400\) environment to SAP within one of Spain's leading companies in the food distribution sector, with extensive territorial presence and an established supermarket network. The professional will be responsible for the technical analysis of the current RPG-based system, identifying dependencies, data structures, batch processes, and existing business logic, aiming to facilitate a controlled transition to the new SAP environment. They will actively participate in evaluating integration alternatives, defining connection mechanisms between AS400 and SAP during the coexistence period of both systems, and optimizing queries and processes developed using embedded SQL. This is a senior profile with deep analytical capability regarding legacy systems, structural vision of functional and technical architecture, and autonomy to propose efficient, scalable, and organizationally aligned technological transformation solutions. The position is fully remote, with working hours from Monday to Friday, 08:00 to 16:30\. REQUIREMENTS **Mandatory Experience and Technical Knowledge** * Minimum 5 years of development and maintenance experience on the IBM i (AS400\) platform. * Advanced proficiency in RPG Free. * Solid experience with RPG III / RPG IV (legacy versions). * Proficiency in embedded SQL within RPG (complex queries, joins, subqueries, performance optimization). * Knowledge of DB2/400 (physical and logical structures, indexes, data access optimization). * Experience in technical analysis of legacy applications. * Ability to interpret existing code and document business processes. * Experience with batch processes and job management on AS400\. **Desirable** * Experience in migration or technological transformation projects (AS400 to SAP or other ERPs). * Knowledge of system integration (interfaces, data exchange, intermediate processes). * Experience in high-volume transactional environments. * Functional knowledge in logistics, distribution, or retail domains. **Professional Competencies** * Strong analytical ability and structural system vision. * Technical autonomy and decision-making capability. * Proactivity and orientation toward continuous improvement. * Ability to operate effectively in technological transition environments. * Strong technical communication and documentation skills.