Software Developer Customer Portals (m/f/d)

Software Developer (m/w/d) - Rhenag Rheinische Energie AG is looking for Java specialists! Yield: EUR 50000 - 75000 per year. Technologies used:Eclipse, IBM, IntelliJ, Kotlin, SQL, Web, UX UI Design. Requirements and your profile: - Multiannual professional experience as a software developer, ideally in a senior role

• Very good knowledge of Kotlin and modern software architectures
• Experience in the development and operation of web APIs
• Safe to use databases, interfaces and service-oriented architectures
• Ability to analyze technical requirements on customer portals in a structured manner and transfer them to sustainable technical solutions
• Representative team and communication skills, high quality awareness and responsible handling of productive systems
• Very good knowledge of German in word and writing (C1 level) and the motivation to develop professionally and technologically continuously. Your responsibilities: - Designing, developing and responsible for performant, safer and manageable customer portals based on Kotlin with IntelliJ
• Ensure the further development and maintenance of the inventory application on the IBM i platform and develop modules with RPG IV (Fully-Free format), Eclipse and SQL
• Translating technical requirements into robust technical solutions for sustainable implementation
• Taking a leading role in architectural decisions and supporting the team in complex technical issues
• Close cooperation with product management, UX, consulting and other development teams
• Ensure high quality, maintainability and stable operation of customer portals through clean code, automated testing and technical documentation. Category: Java Address: Bayenthal belt 9, Cologne, Germany. rhenag Rheinische Energie AG - About us: Welcome to Rhenag Rheinische Energie AG, one of the oldest German utilities in Cologne since 1872. We offer not only reliable electricity, gas and water, but also as a cooperation partner Stadtwerken throughout Germany innovative software solutions for the energy industry. Our approximately 90 IT experts are the core of our success. We promote a future-proof working environment with flexible working hours, mobile working opportunities, extensive holiday days and personal and professional development. If you want to be part of a dedicated team in which respect and cooperation are raised, we look forward to your application. last updated 10 week of 2026

  Joblocations:

50968 Cologne, Bayenthal Belt 9 NORDRHEIN_WESTFALEN, GERMANY