A national passenger rail operator

Redesigned the reservation platform from a monolith to an AWS event-driven microservices architecture.

Challenge

The reservation monolith was hindering product velocity, on-train integrations and peak-load reliability. Leadership wanted a cloud-native rebuild without breaking the deep partner and channel ecosystem built around the legacy APIs.

Approach

• Analyzed business needs and recommended candidate solution patterns.
• Integrated IT solutions within the reservation domain and across other domains (loyalty, on-train systems, channels).
• Produced and maintained the IT architecture plan with target rules and transition strategy.
• Defined migration playbooks to shift functionality to AWS Lambda / SQS / SNS without simultaneous partner re-integrations.
• Communicated detailed specifications and shepherded implementation across teams.

Outcome

The target architecture was adopted, reducing monolith-induced release risk and paving a path to on-train mobile integrations that would have been prohibitive on the legacy stack.

Technology stack

SOA, Microservices, REST, JSON, AWS Lambda, SQS, SNS, on-train mobile application architecture

Estimated return on investment

Estimates are directional, based on comparable modernization benchmarks. Actual savings depend on starting baseline, scope and execution discipline.