Each of these is a system real people depend on — with the constraints, architecture decisions, and honest post-mortems written up. No tutorial clones.
case-study/01
Automated invoice-to-inventory pipeline replacing 5–15 daily manual data-entry workflows for a pharmacy.
Python 3.11 · n8n · Google Gemini · rapidfuzz · pywinauto · SQLite · Pydantic v2 · Tailscale
case-study/02
Replaced multi-minute manual proof triggers with a 10-second self-service form
Node.js · Express · Playwright · n8n · Gemini 2.5 Flash Vision · Docker Compose
case-study/03
Zero-cost Telegram fitness bot with 4 food-logging modes and AI-driven personalization
n8n · Supabase (PostgreSQL) · Telegram Bot API · Gemini 2.0 Flash · Cloudflare Tunnel · Docker Compose
case-study/04
Self-hosted bot tracking badminton court fees and automating payment reminders
n8n · WAHA (Baileys) · Google Sheets · Google Gemini · Docker Compose · ntfy
Touchless Indian GST filing via browser automation and AI CAPTCHA solving
I built a Windows Service that listens for n8n webhooks and orchestrates headless Playwright browser automation to file Goods and Services Tax returns in India completely untouched. The system integrates Gemini Vision API to programmatically solve audio and visual CAPTCHAs in real-time, implements intelligent retry logic with automatic page reloads on transient failures, and sends structured HTML email reports for both successful filings and exceptions. This handles the entire GST filing workflow—from login to final submission—without human intervention.
Node.js · n8n · Playwright · Gemini Vision