SMS alerts that have to arrive.
A missed appointment reminder in healthcare isn't a minor annoyance — it can mean a skipped dose or a missed check-up. MediTrack is a backend service that sends automated SMS alerts for healthcare workflows, and the engineering focus was on making delivery reliable and verified.
01The problem: alerts that have to arrive
Plenty of apps send notifications. The bar for healthcare is higher: the message has to reach a real, correct phone number, and the system has to be dependable enough that a clinic can actually trust it for appointment reminders and medicine alerts. That reliability requirement drove the design more than any feature did.
02Why a dedicated backend service
I built MediTrack as a focused Spring Boot backend exposing REST APIs, rather than bolting SMS logic into a larger app. Keeping it as a standalone service means any system — a clinic portal, a scheduler, an admin tool — can call the same well-defined endpoints to send or manage alerts. It's a clean separation: MediTrack does one thing, messaging, and does it consistently.
Make the messaging layer a service, not a feature. A single, well-defined API for "send this alert" is far easier to trust, test, and reuse than the same logic scattered across whatever app happens to need it. One responsibility, one clear interface.
03Verified delivery via Twilio
For the actual SMS delivery I integrated the Twilio API, and crucially used its verification flow. Before the system commits to sending alerts to a number, that number is confirmed as valid and reachable. In a healthcare context this matters twice over: it prevents alerts from silently vanishing into a mistyped number, and it stops the system from blasting messages to numbers that were never meant to receive them.
04How an alert gets sent
Request
A client calls the REST API with the alert details — recipient, message, type.
Validate the number
The number is checked through Twilio's verification flow before anything is sent.
Dispatch
Spring Boot hands the verified message to Twilio for delivery.
Configurable use cases
The same pipeline serves appointment reminders, medicine alerts, and emergency notifications.
05What I took away
The takeaway was about scope discipline. It would have been easy to grow MediTrack into a sprawling app. Keeping it a tight, single-purpose service with a clear API made it more reliable and more reusable — and reliability is the entire point when the messages carry medical weight. Building one thing that genuinely works beats building five things that mostly do.