Things we have learned, written down

Idempotency is the difference between a payment system and a payment problem

Retries are not an edge case, they are the normal operating condition of any distributed system. Here is the design that keeps a duplicate request from becoming a duplicate charge.

Arjun Nair · 31 Aug 2026

Your staging environment is lying to you, and here is where

Staging that does not match production is worse than no staging, because it produces confidence rather than information. Four differences account for most of the surprises.

Ananya Deshpande · 24 Aug 2026

Performance budgets, and why they belong in your build pipeline

Page speed erodes one release at a time. A number enforced in CI is the only thing we have found that reliably stops it.