Writing

Engineering
notes

How real production decisions actually got made — deployment, edge/hardware integration, and reliability, from systems I've built and operated end to end.

Infrastructure & deployment
One Droplet to AWS

Migrating a production Django platform (Garaad) off a single DigitalOcean droplet — with no SSH keys and no long-lived AWS access keys anywhere.

AWS IAM / OIDC SSM Django
Edge & hardware
When Software Can't Reach the Hardware It Controls

Bridging a cloud POS platform (FranchiseTech) to physical till hardware — protocol standardization, local-server security, and why "sent" and "confirmed" are never the same word.

Android / Kotlin ESC/POS Postgres
Reliability & edge state
What "Offline" Actually Means

Designing an offline sale queue for a production till — why navigator.onLine isn't enough, classifying checkout failures correctly, and failing loudly on purpose.

TypeScript Next.js Offline-first