Notes.
Occasional writing on how we build — the decisions, trade-offs, and principles behind the work. No hot takes, no hype.
Validate at the boundary
Parse untrusted data once, at the edge, into a type the rest of your system can trust — and stop re-checking it everywhere else.
#engineering#typesMeasure the slope, not the snapshot
A single number rarely tells you whether you're winning. The direction it's moving almost always does.
#data#product