Hi, I’m Gustavo.
I build

mobile apps

for businesses across the globe.

I've worked both on SDKs used by companies such as Uber and Samsung, and on apps featured by Apple. Over the past seven years, my code has run on millions of devices.



App Architecture

I was the only iOS developer working on the app. I integrated credit-card payments and ads and reduced the existing technical debt while implementing new features. With millions of monthly users, I aimed to produce high-quality code that could easily adapt to changes.

A mockup of a project


Core Location
Battery optimization

I served as a squad leader and build the iOS team from the ground up. I interviewed dozens of candidates and coordinated the work among the different iOS developers. I refactored their whole SDK, increased test coverage by 50%, and reduced battery usage to 5%/day for a 24/7 running period.

A mockup of a project



This is a personal app that I made entirely with Flutter. I co-founded it with a designer and we conducted market and UX research. I was responsible for laying out the technical architecture and the database. Serica is available on both Android and iOS

A mockup of a project



This is a personal app that I made entirely with Swift. I single-handedly developed & designed it
 from scratch. I ran marketing campaigns generating 
30,000+ downloads after a couple of days. Over the years I added support for WatchOS and Widgets.

A mockup of a project

Other projects

Core Data

I worked on different short-term missions involving the biggest telco, news & media companies of Belgium such as The Voice, Tomorrowland app, Brussels Airport, De Morgen, etc.

A mockup of a project


I do

iOS Development

I have over seven years of experience in making iOS apps. I worked on UI-heavy-focused apps as well as SDK-only projects. I aim to produce simple and maintainable solutions instead of overengineered ones.

Flutter Development

I'm also familiar with hybrid technologies such as Flutter, which lets me target iOS and Android using the same code base. Both native and hybrid approaches have pros and cons; it depends on the project resources & requirements.


I am

Originally from Brazil, I grew up in Belgium and worked in Japan and Taiwan. I love creating my own apps, which I treat like business ventures. This has led me to gain a better understanding of design, marketing, and sales. I believe having this holistic view of products is particularly helpful in smaller teams.