Blog

August 3, 2026

The 15 Minutes That Saved Me From a Vendor-Coupled Service

A practical walkthrough of applying the Dependency Inversion Principle at an OCR provider boundary, before the coupling got expensive to undo.

principlessoftware-engineeringdependency-inversion

August 3, 2026

The Hidden Assumption That Almost Shipped: Passenger Count Isn't Voucher Count

A one-click Excel export replaced a manual, error-prone process, but only after a wrong assumption about how meal vouchers actually work got caught in review.

backenddata-modelingnestjspostgresqlcase-study

August 3, 2026

Reading a Passport Like a Standard, Not a Screenshot

How the ICAO 9303 Machine Readable Zone format turned a fragile OCR-to-data problem into a deterministic parsing problem.

ocrbackendtypescriptsoftware-engineering

August 3, 2026

YAGNI Isn't 'Don't Plan Ahead': It's 'Don't Pay for a Guess'

A one-line code review comment turned an internship 'good architecture' instinct into a lesson about the real cost of premature structure.

principlessoftware-engineeringyagni