Engineering Notes

Chan MG
writes about building.

Architecture decisions, AI-native workflows, and the thinking behind building multi-product SaaS platforms.

Topics Auth AI Architecture SaaS Node.js Databases Permissions

All Posts

4 posts
Architecture SaaS Databases
Multi-Database Architecture for Enterprise Customers: How We Built BYODB at Positeasy
A hybrid multi-tenant model. Shared SaaS path stays untouched. Enterprise merchants get their own PostgreSQL. One API call to provision. JWT-driven per-request routing.
May 2026 11 min read Architecture · PostgreSQL · Multi-tenant
AI SaaS Engineering Product Delivery
Using Agentic AI and Gen AI in SaaS Product Engineering
A practical view of where Gen AI and Agentic AI actually create leverage inside SaaS product teams, and where they still need hard guardrails, clear ownership, and human judgment.
April 2026 9 min read AI · SaaS · Product Engineering
Engineering Product Thinking Mindset
The 100x Product Engineer Isn't a Myth
The gap between engineers who code and engineers who solve the right problems is widening faster than ever. Here's what it actually looks like — and how to get there.
March 2026 8 min read Engineering · Product · Mindset
Auth Architecture SaaS
Building a Centralized Auth System for a Multi-Product SaaS Platform
One auth service. Three independent products. Kiosks, POS terminals, and mobile apps — all secured differently, all talking to the same identity layer.
March 2026 12 min read Node.js · Redis · JWT
C
Chan MG — Building multi-product SaaS platforms. Writing about the architecture decisions that come with scale.