Koali
koali

blog

Notes from
the bill.

Tactical writing on AWS cost optimization, infrastructure efficiency, and lessons from real engagements. No fluff, no vendor pitches, just things that actually move your bill.

koali · blog

5 AWS Cost Wins You Can Ship This Week

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5 AWS Cost Wins You Can Ship This Week

Five cost-cutting changes that take less than a day each to execute and tend to pay for themselves in the first month.

April 10, 2026·2 min read·aws · cost-optimization

koali · blog

The Hidden Cost of Cross-AZ Data Transfer

April 3, 2026·2 min read

The Hidden Cost of Cross-AZ Data Transfer

How a chatty service architecture can quietly turn into a five-figure monthly line item — and what to do about it.

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