Stefanie Erne is a Senior Software Engineer at nxt Engineering GmbH, where she specializes in architecting and developing innovative web applications across diverse industries. With over a decade of experience, she focuses on building scalable, full-stack solutions using Angular, GraphQL, and modern backend technologies. Her passion lies in transforming complex technical challenges into intuitive systems that simplify user experiences while leveraging cloud-native architectures to ensure long-term maintainability.

LOCATION: Zürich
KEYWORDS: Architecture, Technology, Lessons learned

SPEAKER: Stefanie Erne   COMPANY: nxt Engineering GmbH
SLIDES: Slides are available (for members) – please contact the secretariat to obtain them.

International train travel is notoriously complex: multiple countries, languages, booking systems, and pricing models make building a reliable booking experience surprisingly hard. This talk presents a real-world case study of an international train booking platform and shows how solid architectural principles and design patterns can turn a fragmented, integration-heavy domain into a user-friendly and reliable system.

We’ll dive into how to design resilient systems that cope gracefully with unstable external providers and how to shield users from the underlying complexity of cross-border rail systems. We’ll look at how we leveraged Hexagonal Architecture to keep the core domain clean, and how an Event-Driven Architecture combined with CQRS allows us to gracefully handle long-running processes and gives us a built-in audit trail. The focus is on the architectural choices we made and the practical lessons learned from building a mission-critical booking platform.

LANGUAGE: Talk: en / Slides: en

Stefanie Erne is a Senior Software Engineer at nxt Engineering GmbH, where she specializes in architecting and developing innovative web applications across diverse industries. With over a decade of experience, she focuses on building scalable, full-stack solutions using Angular, GraphQL, and modern backend technologies. Her passion lies in transforming complex technical challenges into intuitive systems that simplify user experiences while leveraging cloud-native architectures to ensure long-term maintainability.

---