Service Engineer (m/f/d)

Become Service Engineer (m/f/d) at Retarus.

Retarus is a worldwide provider of cloud-based messaging solutions at enterprise scale. We serve over 40% of the companies listed on the S&P Global 100, e.g. Adidas, Bayer, SAP, BNP Paribas, Goldman Sachs, T-Systems, Swarovski & UPS, as well as governmental agencies and major players in markets across the world. Privately owned and founder-managed for over thirty years, Retarus is customer-oriented, stable, a fair employer, and a strategic business partner with a long-term vision. With some 500 employees in 19 offices on four continents, Retarus operates locally and thinks globally: our teams are organized across borders and are highly integrated. This makes Retarus a multicultural, multilingual, and engaging workplace. We are committed to creating a diverse and dynamic environment for our employees, with generous compensation, time off, and a global, collaborative workplace.

What we offer

• Mobile working and flexible working time
• Collaborative, diverse company culture and superior team spirit
• Flat hierarchies and great feedback culture
• Development opportunities & career perspective
• International business & cross-site collaboration
• Modern, dog-friendly offices with nice amenities
• Company-paid health insurance, public transportation, lunch vouchers and further benefits

What you'll do

As a Service Engineer (EDI, E-Invoicing), you act as the primary technical contact for our existing customers, supporting stable operations and continuous improvement of their EDI and E-Invoicing environments.

With expertise in EDI standards and E-Invoicing frameworks, you ensure reliable and efficient operation of customer integrations - from incident resolution and change management through to optimization and ongoing service excellence.

Key Responsibilites:

• Acting as the main technical contact for customers across incidents, service requests, and change requests, ensuring stable and efficient operations
• Managing and supporting EDI and E-Invoicing integrations, including configuration, maintenance of mappings, workflows, and partner connections
• Analyzing, troubleshooting, and resolving integration issues while performing root cause analysis and ensuring sustainable fixes
• Supporting onboarding of new business partners, including setup, testing, and validation of message flows across EDI and E-Invoicing processes
• Working with EDI standards and protocols (e.g., EDIFACT, ANSI X12, XML, SAP IDoc, VDA, AS2, OFTP2, APIs) and E-Invoicing frameworks (e.g., Peppol, ZUGFeRD/XRechnung, FatturaPA)
• Monitoring production environments and driving improvements in stability, performance, automation, and operational efficiency
• Collaborating closely with internal teams (Product, Development, Infrastructure, Project Management) and ensuring proper documentation and knowledge sharing

What you'll need

• Completed apprenticeship or university degree in IT, Computer Science, Engineering, or a related field, or equivalent practical hands-on experience, with several years of experience in EDI, E-Invoicing, or B2B/system integration environments
• Strong knowledge of EDI standards (e.g., EDIFACT, XML, ANSI X12, VDA), communication protocols (e.g., AS2, OFTP2, SFTP, HTTPS, APIs, Webservices), and ERP/B2B integration systems (e.g., SAP IDoc, Oracle, Microsoft Dynamics)
• Good understanding of E-Invoicing frameworks (e.g., Peppol, ZUGFeRD, XRechnung, FatturaPA or similar) and related regulatory requirements
• Strong analytical, structured, and detail-oriented working style combined with high customer orientation, strong communication skills, and the ability to manage multiple priorities and projects in parallel
• Proactive, solution-oriented, and hands-on mindset with the ability to work independently, take ownership, and continuously develop expertise in EDI, E-Invoicing, and integration technologies
• Very good English skills (spoken and written); good