Healthcare & commerce / 2024 — Present
Erha Buddy
Making healthcare transactions faster, safer, and more reliable.
01 / CONTEXT
The platform
Contributed through Rolling Glory from 2024, then continued at PT Arya Noble from November 2025. The platform connects customer-facing healthcare journeys with internal operational systems.
02 / CONTRIBUTIONS
My work
- Optimized transaction retrieval through query-plan analysis, index tuning, and database optimization.
- Moved pricing, promotional calculations, and payment totals to the backend across product, treatment, teleconsultation, and Flash Sale checkout.
- Implemented verification for HMAC-signed requests, Apple App Attest, and Google Play Integrity, including timestamp validation.
- Improved asynchronous transaction workflows through concurrency controls and retry safeguards.
- Supported backend reviews, release coordination, and production troubleshooting.
03 / OUTCOME
The result
Reduced average production API response time for transaction retrieval from 10 seconds to 300 milliseconds — a 97% improvement.
Interested in the engineering behind this work?
Let’s talk ↗