Modernizing a monolithic legacy PMS into an elastic, event-driven API Mesh—enabling real-time guest personalization and zero-downtime mobile orchestration across 200+ properties.
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Portfolio of 200+ properties restricted by a 15-year-old on-premise Property Management System.
Cloud Solutions Architect + 3 Backend Engineers + DevOps Lead embedded within Digital Transformation unit.
Surrounding the legacy core with a modern API facade to enable mobile check-in and IoT room controls.
Strangler Fig pattern using Node.js/Go, GraphQL Mesh, and AWS EKS with Redis caching.
The client's expansion was throttled by a legacy PMS that lacked a modern API. Integrating simple guest features like digital room keys or real-time yield pricing required 6-month dev cycles and high-risk database surgery.
The friction was operational: during peak booking windows, the legacy system's latency spiked to 2 seconds, causing timeouts in third-party channels (OTAs) and resulting in significant revenue leakage and guest frustration.
Requests queued sequentially; one slow query could halt the entire booking flow.
Non-blocking event streams and cached reads deliver p95 responses in 45ms.
Scaling required expensive hardware upgrades and scheduled downtime.
Services scale instantly during flash-sale traffic without impacting the legacy core.
New digital partners required bespoke, hard-coded connectors and XML mapping.
Standardized REST/GraphQL APIs allow new service integrations in days.
Inventory and rate data cached at the network edge, reducing round-trip times for global booking engines by 85%.
A dedicated security layer scrubs PII and handles tokenization before requests ever reach the unencrypted legacy core.
Automated failovers prevent legacy PMS latency from cascading into the guest-facing mobile applications.
Pre-built adapters for legacy hospitality protocols (Oracle Opera, Sabre) to JSON event translation.
Production-ready templates for high-concurrency hospitality API traffic and rate-limiting.
Real-time monitoring for desync between legacy databases and cloud-native caches.
Automated resource optimization to maintain sub-50ms latency while minimizing AWS OpEx.
De-coupling cached reads from the legacy PMS eliminated the 800ms bottleneck in the guest journey.
Circuit breakers and elastic scaling ensured zero outages during holiday traffic surges.
Moving to a standardized seamless data integration layer allowed the digital team to deploy new partners 5x faster.
Client Testimonial
Coretus didn't just add an API—they surgically de-coupled our digital future from our legacy past. We went from property-level outages to 99.99% availability while launching our mobile key initiative 4 months early.
SVP of Digital Transformation
Stop letting a legacy PMS throttle your guest experience. We engineer zero-downtime seamless data integration layeres that de-couple your core, cut latency, and unlock digital innovation at scale.
Zero-Downtime Strangler Build
Sub-50ms API Performance
100% IP & Model Ownership