Engineering Publications • Architectural Deep Dives

Technical
Engineering Blog.

Practical walkthroughs, architectural breakdowns, and real code implementations from my work in AI automation, full-stack systems, and production desktop software.

AI & Automation March 2026
8 min read

How I Built an AI Customer Support Agent with n8n, WhatsApp API, and Supabase

A comprehensive look at building Hukum AI: ingesting multi-channel chat webhooks, parsing unstructured PDF knowledge bases, managing tenant conversation history in Supabase, and designing human operator fallback.

Key Architectural Concepts:
  • Webhook ingestion buffer design for high-traffic WhatsApp bursts.
  • Prompt matrix construction preventing hallucination on pricing queries.
  • Automated fallback routing transferring conversations to live human operators.
n8n WhatsApp API Supabase RLS OpenAI
Author: Muhammad Hasnain Read Article →
Mobile & Networking February 2026
10 min read

Building a Real-Time Multiplayer Board Game with Flutter and WebSockets

How I built the AI Sequence Board Game engine: real-time WebSocket state synchronization using Go goroutines, custom 60fps Flutter canvas rendering, and a heuristic min-max offline AI algorithm.

Key Architectural Concepts:
  • Concurrent WebSocket hub with room-based broadcast channels in Golang.
  • Responsive, non-scrollable game board layout with Flutter CustomPainter.
  • Min-max tactical evaluation evaluating Sequence sequences in 25-second offline turns.
Flutter / Dart Golang WebSockets Min-Max AI Real-Time Sync
Author: Muhammad Hasnain Read Article →
Enterprise Systems January 2026
9 min read

Architecting Offline-First Enterprise Software with Government Tax Integration

Lessons from building and shipping an FBR PRAL tax-compliant desktop invoicing system deployed across commercial Pakistani businesses. SQLite caching, background retry queues, and cryptographic JSON payloads.

Key Architectural Concepts:
  • Zero retail downtime through local SQLite persistence and background sync workers.
  • PRAL JSON cryptographic payload signing and QR code generation for fiscal receipts.
  • End-of-day reconciliation algorithms detecting and resolving transmission gaps.
C# .NET Offline-First PRAL API SQLite
Author: Muhammad Hasnain Read Article →