We Built It for One. Then Everything Multiplied.

When we launched our Android banking app, it had one account, one portfolio and one currency. The architecture was simple because the assumptions were simple. Then the business grew.
This is the story of how we evolved the business and the app into a multi-account, multi-portfolio, multi-currency platform - complete with junior accounts, four portfolio types, and two currencies - without starting from scratch.

Told as a two-perspective narrative: one speaker covers the business drivers behind each evolution (why we needed it, what the market demanded), while the other covers the technical reality of making it happen on Android (what broke, what scaled, and what we'd do differently).