An AI layer inside AbaClik that turns spoken Swiss German into real in-app actions — recording an expense, starting a time entry, filing an absence.

Spans the whole stack: the native iOS experience, the shared Kotlin Multiplatform layer beneath it, and the Spring backend that orchestrates the models.

Abacus' most-used mobile app, connected to Abacus ERP: time tracking, expenses, absences, business trips, calendar and addresses.

I rebuilt In&Out — the time-tracking feature, and the largest in the app — from scratch. I also built business trips, the calendar and addresses, and modernised a number of the app's older components.

Signing documents digitally, covering every level from a simple electronic signature to a qualified one backed by a verified identity. It ships on iPhone and iPad, both as DeepSign and as DeepSign Desk, a service-desk version.

I do all of the mobile iOS work on it — the iPhone and iPad apps, both DeepSign and DeepSign Desk. That includes designing and prototyping, In-App Purchases, a simplified onboarding, and connecting an existing DeepID from inside the app.

A digital identity solution compliant with ETSI standards, used for everything from qualified electronic signatures and opening bank accounts to digitising public services.

I wrote most of the app — Secure Enclave key handling, certificate pinning, and the core identification flows.

A calculator without buttons: you write the digits by hand and a machine-learning model recognises them as you go.

Built for the Apple WWDC Scholarship in 2019, and selected as a recipient. I trained the Core ML model that recognises the digits myself, rather than using an off-the-shelf one.