use case

Deutsche Bahn – Transportation/Railway Industry

Project description

The project focused on designing and implementing a next-generation invoicing and billing platform for B2B German railway clients. These clients rent and use railway infrastructure, and the system is responsible for accurately tracking usage and generating invoices for amounts exceeding €500 million per month. The solution was built with a scalable and extensible architecture, ensuring long-term adaptability with minimal overhead. It streamlines the end-to-end invoice lifecycle – from creation and correction to cancellation, renewal, and secure storage.

Business impact & achievements

  • Scalable and extensible architecture designed to accommodate future growth with minimal overhead
  • €500M+ monthly billing handled seamlessly for B2B railway clients
  • Operational efficiency gains through application unification and billing process transformation
  • Strengthened invoice governance with the 4-eye principle for validation and correction
  • Automated processes for invoice creation, correction, cancellation, renewal, and storage
  • Digitized & automated Accounts Payable with ERP (SAP/Salesforce) integration
  • Improved data quality through enrichment, correction, and automated imports
  • Traceability and validation optimized for invoice generation and corrections

Cost optimization

  • Reduced operational expenses by decommissioning TIBCO and Software AG licensed platforms
  • Lowered license costs through strategic platform consolidation

Support & operations

  • Dedicated HS Dev Team supporting production environment
  • Ensuring high availability and reliability of systems, billing over €500M monthly
  • Proactive monitoring, traceability, and validation, ensuring business continuity

Technology stack & expertise

  • Java, Spring Framework, Hibernate – robust enterprise backend
  • ActiveMQ – reliable messaging and integration backbone
  • SAP/Salesforce ERP Integration – seamless connectivity for billing & accounts payable
  • Enterprise-grade architecture – modular, extensible, and optimized for high-volume processing

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