Diagnostics Booking Platform — Engineering Case Study

Healthcare / Search Platform · by Yatharth Lakhera

Diagnostics booking service with sub-100ms search across 1M+ test-center records — reducing patient churn from diagnostics to surgery by 40%.

The challenge

Patients consistently dropped off between diagnostics and surgery — finding the right test center, comparing prices, and booking was friction-heavy. Every lost patient at the diagnostics step was a lost surgery downstream.

The build

Built a sub-100ms Elasticsearch-powered search across 1M+ records — geolocation, typo tolerance, synonym matching — and an event-based lazy cache for live pricing and availability. Embedded a one-click booking flow directly into the post-consultation patient journey.

Impact

-40% patient churn from diagnostics into surgery
<100ms search latency across 1M+ test-center records
20,000+ tests bookable across 100+ diagnostics centers
Continuous data freshness without overloading source systems

Technologies: Java, Spring Boot, Elasticsearch, Redis, AWS, Event-Driven

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