Dom Goodwin

13 May 2026

The Engineering Behind the Platform

At Monzo, Platform Engineering looks a little different. We design APIs and write services that provide functionality in the platform for others to leverage. We think about reliability, ownership and testing in the same way that product teams do

A picture shows a square with dotted lines - the 'cluster-O'. Outside this square to the top left is a green box that says 'pool(s)' and a blue box on the bottom right that says 'NAT Gateway' . Inside the dotted line box are four green boxes near each corner of the square, between the two top green boxes is a small orange rectangle numbered '1' that these two green boxes have arrows pointing into. The top right green box is numbered '2'. There are arrows connecting the top right corner green box to the bottom right green box, and the bottom left box connecting to the bottom right and top left green boxes. An arrow pointing up from the bottom left to the top right green box says '3'. An arrow pointing from the top green box to the middle orange box is labelled '4'. The top left box green says 'CoreDNS', the top right green box says 'egress-operator', the bottom right box says 'egress-gateway', the bottom left box says 'microservices', the orange box says 'ExternalService api.foo.com'. The bottom green box has an arrow pointing to the blue box next to it that sits outside the dotted line square. There is an arrow pointed to the right from the blue box that says 'Out to the internet'.

Technology

25 November 2022

Reducing our NAT Gateway cost with private networking between AWS and GCP

Sharing knowledge on how we implementing private networking between AWS and GCP