PostgreSQLNode.jsSchedulingArchitecture
Posting a Recurring Transaction Exactly Once
How the recurring engine behind Pura Hisab posts the rent exactly once, in the right time zone, and never undoes a row you deleted on purpose.
16 min read
Read moreWriting
Notes from the build
Things I've worked through on production systems, written up while the details were still fresh.
- GoLLMPrivacyRegex
Why I Didn't Use an ML Model to Detect PII
Building an LLM proxy that redacts PII in the request path, I chose regex over NER. The reasoning, and an honest account of where my own patterns get it wrong.
10 min readRead more - BLEArchitectureSecurityOffline-First
In Range Is Not the Same as Allowed
BLE is a proximity protocol, so anyone near your hardware can talk to it. Splitting transport from authority, and being honest about what a client-side permission check is and is not.
9 min readRead more - React NativeExpoBLEBluetooth
Bluetooth Low Energy in an Expo App
Seven things I ran into shipping BLE with react-native-ble-plx on Expo: dev clients, the simulator, version-dependent Android permissions, and the byte protocol behind a single characteristic.
11 min readRead more - RemixeSewaPaymentsNepal
Integrating eSewa Payments in a Remix App
A practical guide to integrating eSewa, Nepal's most widely used digital wallet, into a Remix application: form handling, signature generation, and the redirect flow.
5 min readRead more