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A zero-downtime AWS→GCP …
Why we migrated at all
I spent the second half of 2025 on contract with a US retail and delivery startup, moving their entire production stack from AWS to Google Cloud. That was roughly 25 services on a Python and Go codebase. The trigger wasn’t a technical purity argument. It came down to …
Running a digital bank at …
Why five nines, and what it actually cost us to promise it
For a little over five years I was the DevOps and Infrastructure Lead for Colombia’s first fully digital bank, built on AWS. Signing up to a 99.999% availability SLO sounds like a slide-deck number until you do the arithmetic. It …