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I built a $39 receipt sorter that runs entirely on your laptop. WiFi off, 90s demo inside. No cloud, no uploads, no subscription โ€” because the model is local. Built for #Hacktoberfest Side Hustle.

LedgerLens โ€” a $39 receipt sorter for freelancers that never leaves their laptop Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle Submission ๐Ÿ’ธ Ashutosh Ranjan Ashutosh Ranjan Ashutosh Ranjan Follow Oct 17 LedgerLens โ€” a $39 receipt sorter for freelancers that never leaves their laptop #

We haven't written up this one. Dev.to has the full story โ€” the link below goes straight to it.

Read the original at dev.to โ†’

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I almost rebuilt a project for the wrong reason, a 20 minute audit caught it

I have an iPhone-driving rig. An ESP32 board plugs into the phone over USB and plays human, screen taps, button presses, the works, so my local agent can actually operate the phone instead of justโ€ฆ

  • Reporter conducted 20-minute audit before planning rebuild
  • Audit found old code clean, no security issues
  • New rebuild justified by architectural improvements, not security

Database Indexing โ€“ Part 1: How Indexes Help Find Data Faster

Recently, I was reading two books: Good Vibes, Good Life and The Mountain Is You . I usually forget things after some time ๐Ÿ˜…. So whenever I want to revisit something I've read, I go back to the book.

  • Database indexing improves data retrieval speed
  • PostgreSQL uses indexes to locate records quickly
  • Index Only Scan retrieves data directly from index

Node.js Marketplace Verification: 6 Secure SMS OTP Login Flow Lockout and Replay Defenses

Short answer: design a secure SMS OTP login flow by putting rate limiting, retry control, lockout, and replay protection in your Node.js backend, before and after the provider call.

  • Implement six security gates before provider call in Node.js OTP flow
  • Seller requests vehicle service report, backend enforces defenses
  • Protect provider call with idempotency key and exponential backoff

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