Case studies

Problems where a wrong answer cost money, and what I did to make it impossible.

• For technical teamsFor business owners

  Taking the model off the critical path

  A booking agent on WhatsApp was taking 7.4–9.4 seconds to confirm, and could tell a guest a table was booked when it was not. Moving the commit off the model's turn cut it to ~0.9s and made the failure structurally unreachable.

  • Kotlin
  • Spring Boot
  • Claude (tool calling)
  • WhatsApp Business Platform

• For technical teamsFor business owners

  The machine sells the ticket

  An unattended machine committing a real transaction against someone else's system of record, with nobody there to fix it. Ten kiosks and no box office at the pilot; 17 cineplexes nationwide by the end of the rollout.

  • Java Swing
  • SOAP / VISTA
  • Windows XP Embedded
  • Unattended transactions