CASE STUDY #01
Backend & Mission-Critical Integration
Airport Self-Service Check-in Kiosk Engine
High-availability backend engine handling concurrent multi-passenger check-in transactions and real-time multi-airline reservation integrations under strict 24/7 airport SLAs.
Node.js
Express.js
REST APIs
Airline Integrations
24/7 SLA
Availability Target
24/7 SLA
Transaction Mode
Multi-Pax Concurrent
Fault Tolerance
Auto Rollback & Retry
The Operational & Engineering Challenge
Airport kiosk hardware requires continuous 24/7 availability. Network instability between physical airport kiosks and remote airline reservation systems risked session drops and lost booking records during high-traffic windows.
Engineering Solution
- Built an Express.js backend engine managing multi-passenger check-in transactions concurrently.
- Integrated multi-airline reservation APIs for automated PNR lookup, verification, seat allocation, and boarding pass dispatch.
- Implemented exponential backoff retries, state-preserving session fallbacks, and transaction rollback mechanics.
Architectural Deep Dive
- Idempotent PNR reservation state machine preventing duplicate seat assignment or double boarding pass issuance during intermittent packet loss.
- Unified adapter layer normalizing heterogeneous airline PSS (Passenger Service System) payloads into a single predictable contract for kiosk touchscreens.
- Structured telemetry and real-time health probes enabling proactive circuit-breaking before terminal queues build up.
Result & Impact
Delivered uninterrupted check-in operations during peak flight schedules, preventing counter congestion and meeting strict SLA uptime.
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