Y-Tree

Native iOS wealth app with Open Banking and identity verification

A native iOS app for a wealth-management service: clients link bank accounts through Open Banking and verify their identity without leaving the app.

Role: iOS Engineer
Period: 2020 – 2023

Context

Y-Tree builds financial tooling for private clients. The iOS app is how clients onboard, link accounts and follow their finances.

The challenge

Integrate third-party KYC and Open Banking SDKs into native flows that stay smooth, secure and testable, while modernising a legacy codebase in production.

Built across the stack

Open Banking account-linking flows
KYC identity verification with a third-party SDK
20+ screens in Swift with UIKit and SwiftUI
RxFlow navigation and RxSwift data flows
Migration of five major flows from Xamarin Forms and UIKit to SwiftUI and The Composable Architecture

Engineering highlights

Legacy Xamarin Forms and UIKit screens replaced flow by flow in a live production app
Third-party SDK callbacks folded into the app's reactive data flows
Native UI components and stability work on production functionality

What it enables

Clients link accounts and verify identity inside the app, and the migrated flows became the pattern for the rest of the codebase.