Eduardo Santi

The Prozis Go codebase was already built on a modular architecture with Coordinators handling navigation when I joined. My focus was scaling that foundation as the app and codebase grew — extending the Coordinator-based structure to 40+ self-contained flows, each with its own dependency graph, to keep a 2,000+ file codebase manageable for our iOS team.

The app already had a shared UI component library in place; I evolved it significantly, growing it to 70+ reusable components so new features could assemble from a consistent set of parts instead of solving the same interface problems repeatedly. On the hardware side, the SDK layer for Prozis' connected devices — smart scales, bands, jump ropes, sensors — also already existed; I made it more flexible, simplifying and speeding up how new devices could be supported.

Two features tie directly to the revenue number above: Shake & Go and a slot-machine-style rewards mechanic, both gamified discount features I led end-to-end, from interaction design through backend integration. Test coverage sits at 85% across the codebase. Over my time on the project, crash-free sessions — tracked in Firebase Crashlytics — moved from 96% to 99.6%, and the App Store rating improved from 4.2 to 4.5, even as the app roughly doubled its daily user base.

Smart IZI was a mature Objective-C codebase built on MVC — the kind of app where a full rewrite would have meant months without new features. Instead of proposing a rewrite, I made the case for a targeted migration: introduce Swift for all new work through a Swift/Objective-C interoperability layer, and migrate the app's most critical modules from MVC to MVVM, while leaving lower-risk, stable code untouched. Every new module from that point on was built in MVVM from day one.

Alongside version 3.0's visual redesign — a new look, feel, and navigation system — I integrated native biometric authentication and camera-based capture into the onboarding flow. I also updated ITSector's internal iOS training academy to include Swift and the interoperability approach we used in production, and mentored six developers through it, so the migration path stayed useful after I moved to the next engagement.

On a related project, Access Bank Mozambique, I was iOS lead on a greenfield build on ebankIT's Omnichannel platform, delivered in just 4 months, setting up a CI/CD pipeline in Azure DevOps integrated with GitFlow from day one. View on the App Store ↗

DOC9 Justice — a digital platform for legal proceedings and hearings, centralizing case documents and audio recordings, with real-time location tracking for multiple professionals attached to the same case.

Promed Access Control — a medical staff scheduling solution using iBeacon for precise presence and working-hours tracking, with a backend I built in Swift using Vapor.

Elefante Letrado — a digital reading engagement platform for early childhood education, adopted by schools since 2013 and still in use today. View on the App Store ↗