For a vehicle-buying business, SMS carried the lead and dispatch workflow. Mark Philippe Mirasol diagnosed failures in the inherited system, rebuilt its sending controls and extended the platform through the later stages of a deal.
The inherited system had several distinct failure modes: missing inbound replies, carrier filtering, an expired certificate and message content that broke database writes. Shared hosting later constrained the sending queue.
Because leads and deals moved through SMS, each repair needed to address the underlying cause. The existing workflow was worth retaining, but its message handling and infrastructure needed clearer control.
Mark rewrote the inbound handler and built a managed number pool with rate limits, daily caps and a consistent sender for each customer. Later work repaired TLS, handled message content and moved services to AWS Lightsail.
The workflow expanded into Google Maps address validation, VIN checks, Zoho CRM fields, business-hours follow-up and stage changes from offer to dispatch. AI intent detection was later extended with RoBERTa confidence scoring and Redis conversation history.
Project materials showing the workflows and interfaces described in this case.
The delivery connected diagnosis, infrastructure changes and incremental product improvements around one business workflow. The message-handling foundation supported the later address, quotation and dispatch features.
This is the core of a software takeover: understand the inherited behavior, fix its failure paths and improve the system without losing the business process. Account control, carrier dependencies, queue behavior and recovery steps need to be recorded so the next operator can work from them.
Project contribution: Mark Philippe Mirasol. The scope described above identifies the work behind this case.
Editorial review: Ego Eimi · Updated September 6, 2026 · About the team
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