The new platform wasn't being rebuilt screen by screen. Dashboard, markets, watchlists, portfolio and trading all needed to work as one connected experience.
I looked for shared interaction patterns that could reduce learning as users moved through the product. Navigation, layouts, empty states and actions followed the same principles, making different parts of the platform feel familiar without becoming identical.
That approach also made future work easier.
On native apps, biometric access could rely on the device. On PWA, the same promise needed a fallback when the browser could not recognise or trust the device in the same way. The interaction changed by platform, but the security model still had to make sense as one experience.