Jacob Aguilar, iOS developer.

13 months on the same product, first through Baufest and then through SlashMobility. A team of six iOS developers, Scrum and Kanban, sprint planning, dailies and code review. I built the internal app for the international sales team in SwiftUI, Combine and Core Data, designed to work with no connection. I cut redundant clicks in the order flow by 40% by streamlining flows and fixing critical bugs, and reworked the customer tables so more useful data fits on screen. Later I led the modernization phase and contributed to migrating persistence from Core Data to SwiftData without interrupting reps in Europe, the U.S. and Canada.

Swift, SwiftUI, Combine, Core Data, Swift Data

The client was running her shop on spreadsheets. I built her an internal iOS app in SwiftUI and SwiftData, with Clean Architecture, for inventory, sales, expenses, losses and batches across more than 100 SKUs, plus the online store in Astro on Vercel. Both sides share the same catalog through Firestore in real time, and stock moves inside atomic transactions so nothing gets sold twice. She passed 2M CLP in monthly sales during the first month.

Swift, SwiftUI, SwiftData, Firebase, Astro, TypeScript

My own fitness app, built from scratch and published on the App Store, made to train without touching the phone. A coach guides you through programs and your own routines and tells you what comes next, a gesture starts or stops each set, and the camera detects the exercise and counts reps with Vision and CoreML, and Apple Foundation Models analyze progress on the device itself. When I added friends and rankings I also built the backend, which started as my capstone project for Globant's Talento Ready Java program: a REST API in Java and Spring Boot on PostgreSQL, with hexagonal architecture, Sign in with Apple, live events over SSE and APNs pushes. It is deployed with Docker.

Swift, SwiftUI, CoreML, Java, Spring Boot, PostgreSQL, Docker

The whole system: web in Astro, backend in Node and Express with PostgreSQL on Supabase, and an iOS app in SwiftUI. More than 200 reservations went through it.

Swift, SwiftUI, Astro, Node.js, PostgreSQL, Supabase

I saw the need and built Prend, an app for personal loans. After passing 1,000 downloads on iOS I built the Android version too, on my own and fully native. Swift and SwiftUI on iOS, Kotlin and Jetpack Compose on Android, one Firebase backend with Cloud Functions, and subscriptions synced across stores. It is live on the App Store and Google Play, where it passed 200 downloads in its first month.

Swift, SwiftUI, Kotlin, Jetpack Compose, Firebase, StoreKit, Push Notifications