DispatchText

Overview

DispatchText automates SMS messaging workflows on top of the Sinch API — bulk campaigns, delivery status tracking, and templated conversational replies for outreach at scale.

The Challenge

Bulk SMS at any real volume needs delivery accountability — the system had to track per-message status and handle retries without duplicate sends, while still supporting lightweight conversational replies triggered by keywords.

What I Built

• Templated bulk sending to segmented recipient lists
• Delivery tracking with status callbacks and retry logic
• Keyword-triggered conversational flows for simple automated replies
• Reporting dashboards for delivery and response rates

Tech Stack

• Messaging: Sinch API
• Backend: Node.js / Python
• Database: PostgreSQL

Key Decisions

• Built on the Sinch API rather than a lower-level SMS gateway, trading some cost efficiency for faster delivery-tracking and reliability out of the box
• Added retry logic keyed to avoid duplicate sends, since bulk SMS at volume needs delivery accountability — a naive retry-on-failure approach risks double-messaging recipients

Outcome / Impact

Automated a previously manual SMS outreach process into a trackable, templated system with clear delivery accountability.