Engineering notes
What we learn while building.
Practical notes on building applications, systems, automation, and AI features that survive real use.
- Sep 21, 2026Storing Money as Integers: How Rinalance Keeps Every Cent ExactFloating-point money drifts. How Rinalance stores every amount as integer minor units, converts between seven currencies with integer arithmetic and one rounding step, and migrated a live database off floats.Product Engineering · 9 min read
- Aug 3, 2025Programming Didn't Get Faster. The Job ChangedA personal take on what changed when coding stopped being the hard part and AI agents became part of my daily workflow.AI · 10 min read
- Aug 3, 2025Why Skipping Authentication Basics Can Break Your AppThe authentication mistakes developers overlook that can compromise their entire application. Covers JWT cookies, access/refresh tokens, and sessions with code examples.Authentication · 10 min read