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Nilson Souto

Verified Expert in Engineering

iOS Developer

Bella Vista, Panama City, Panama, Panama

Toptal member since February 19, 2013

Expertise

Git Xcode iOS Objective-C C++OpenGL Swift MacOS C Linux Blender Qt Development Machine Learning 3D Modeling Software

Bio

Nilson started programming in C/C++ after playing video games for the first time at a young age. Over the last few years, he has worked on iOS applications mostly, and he's now focusing on game development, computer graphics, physics simulation, and vehicle simulation. He's also a 2D/3D technical artist.

Portfolio

Xissburg

Bullet, OGRE, Box2D, Cocos2d, iOS, OpenGL, 3D Graphics

Tessa Barton LLC

iOS, Image Manipulation, Video Editing, Swift, AVFoundation, Core Image

Gonow

SQLite, Box2D, Cocos2d, iOS

Experience

Git - 8 years
Xcode - 8 years
iOS - 8 years
Objective-C - 8 years
C++ - 7 years
OpenGL - 6 years
Swift - 5 years
Blender - 3 years

Preferred Environment

Sketch, ITerm, Atom, Git, Xcode, MacOS, Visual Studio Code (VS Code), Adobe Photoshop, Blender

The most amazing...

...software I've made is a real-time simulator of deformable solids in 3D using the finite element method.

Work Experience

Freelance iOS Developer

2012 - PRESENT

Xissburg

Developed applications for iPhone and iPad with customized user interfaces leveraging UIKit, animations, and transitions.
Implemented geolocation services in iOS apps.
Maintained open-source projects on GitHub.
Taught online courses using the Edukee platform, targeted specifically at game development and computer graphics for iOS, using Cocos2D and Box2D, among other tools and frameworks.
Presented talks at a number of events.
Implemented custom photo and video filters using OpenGL and AVFoundation.
Created an maintained the back end of iOS applications running on AWS EC2.
Began working on a driving/racing game with a focus on realistic vehicle simulation, using C++ and Qt for tools.

Technologies: Bullet, OGRE, Box2D, Cocos2d, iOS, OpenGL, 3D Graphics

iOS Developer | Photo/Video Manipulation

2019 - 2021

Tessa Barton LLC

Developed an app focused on image and video editing, which leveraged advanced AVFoundation features.
Developed a small back end that required using the server-side Swift.
Worked on fixing bugs reported by the many users of this app.

Technologies: iOS, Image Manipulation, Video Editing, Swift, AVFoundation, Core Image

iOS Developer

2011 - 2011

Gonow

Developed and maintained a variety of iOS applications.
Developed a home automation app which allows users to control devices in their homes/offices and access live camera feeds.
Wrote code to communicate with SOAP and REST web services.
Wrote an interactive page-flipping algorithm for iPad eBooks. Derived the formulas to implement said algorithm, and used Core Graphics and Core Animation to achieve the desired effects.
Set up physics simulations for a variety of scenes in a digital book using the Box2D physics engine.

Technologies: SQLite, Box2D, Cocos2d, iOS

Mobile Developer

2010 - 2011

Lab360

Developed applications that communicate with REST web services and actively use push notifications.
Set up physics simulations for a variety of scenes in a digital book using the Chipmunk Physics engine.
Wrote a polyline drawing optimization algorithm using a quadtree in order to draw a route on a map, supporting polylines of over 10,000 vertices in real time.
Developed some 3D applications and demos for iPhone and iPad using the Cocos3D engine.
Developed a couple HTML5 graphics samples using its new (at the time) 3D features.

Technologies: Android, Chipmunk, Cocos3d, Cocos2d, iOS

Experience

Edyn | Real-time Physics Engine Organized as ECS

https://github.com/xissburg/edyn

Edyn (pronunciation: "eh-dyin'") stands for Entity Dynamics, and it is a real-time physics engine organized as an ECS (Entity-component System) using the amazing EnTT library. The main goals of this library are to be multi-threaded and to support networked and distributed physics simulation of large dynamic worlds.

Tezza

https://apps.apple.com/br/app/tezza-aesthetic-photo-editor/id1393061654?l=en-GB

A photo and video editing app making extensive use of AVFoundation, CoreImage, and Metal. The app is able to render very large images in real-time with special effects applied, thanks to an elaborate architecture using levels of detail.

FotoZap

https://picturemarketing.com/apps/

Worked on the FotoZap suite of applications for picture marketing. They are photo and video capturing apps that run on an unattended iPad device in kiosk mode. They make extensive use of AVFoundation for photo and video capture and processing, and also Metal for real-time image filtering and chroma keying.

Elevatr (previously Docz)

I developed the iPhone app from scratch in Swift using the MVVM architecture. This application makes extensive use of advanced UIKit features to present dynamic table views and collection views that load more items as they are scrolled and refresh existing items, eventually to keep things always up to date. I also wrote and managed the Parse back end using JavaScript and Node.js.

SplashCam

I developed the personal SplashCam app with a friend, which allows you to take photos highlighting certain colors while keeping everything else in black and white (also known as the "color splash effect"). It became quite popular at the time, reaching the Top 1 in the Apple App Store in many countries.

Pergunter

Developed Pergunter app, which allows you to post questions using photos or videos and share them only with your friends or with the entire Pergunter community in order to find the right answer.

1000 Images

Presents a gallery of paintings by Carlos Araujo.

Pix apps

Developed Pix app, which provides a new dimension to discovering apps using an infinite bidimensional scroll.

Olimpíadas 2012

Allows you to keep updated with the news and status of the 2012 Olympic Games. Sponsored by Caixa.

Marina de la Riva

Developed an app for the singer Marina de la Riva, which allows you to follow her updates on Twitter and Facebook, watch her videos on YouTube, see her recent photos in Flickr, listen to her songs in SoundCloud, and keep up-to-date with her schedule.

Menino Maluquinho

Contributed to interactive book for the iPad, with primary involvement in the scenes containing physics simulation (made with Box2d) and the dynamic and interactive page-flipping animation.

A menina do Nariz Arrebitado

Contributed to interactive book for iPad, including a complete refactoring of the code to make it reusable and maintainable. Additionally, handcrafted the physics simulation scenes (made with Chipmunk Physics).

Publication

Education

2006 - 2010

Bachelor's Degree in Science and Technology

Universidade Federal do ABC - Santo André, Brazil

2006 - 2010

Bachelor's Degree in Computer Science

Universidade Federal do ABC - Santo André, Brazil

Skills

Libraries/APIs

Core Animation, Core Graphics, OpenGL, OpenGL ES, Parse SDK, Core Image, PubNub, Node.js

Tools

Adobe Photoshop, Git, Xcode, 3ds Max, Blender, Sketch, Atom, ITerm, Photoshop 2018

Languages

Swift, C++, Objective-C, C, GLSL, C++17, JavaScript

Frameworks

Bullet, Box2D, UIKit, Core Data, Qt, Cocos2d, Cocos3d, Chipmunk, OGRE, Metal, RealmSwift

Paradigms

Object-oriented Programming (OOP), Concurrent Programming, Scrum, Functional Programming, Model View ViewModel (MVVM)

Platforms

MacOS, iOS, Linux, Android, Visual Studio Code (VS Code), Parse

Storage

SQLite, PostGIS, PostgreSQL, Realm

Other

3D Modeling, AVFoundation, Physics Simulations, 3D Animation, Computer Graphics, Machine Learning, Game Development, 3D Graphics, Image Manipulation, Video Editing, Physics, Game Physics, iPad, Shaders

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Work Experience

Freelance iOS Developer

2012 - PRESENT

Xissburg

Developed applications for iPhone and iPad with customized user interfaces leveraging UIKit, animations, and transitions.
Implemented geolocation services in iOS apps.
Maintained open-source projects on GitHub.
Taught online courses using the Edukee platform, targeted specifically at game development and computer graphics for iOS, using Cocos2D and Box2D, among other tools and frameworks.
Presented talks at a number of events.
Implemented custom photo and video filters using OpenGL and AVFoundation.
Created an maintained the back end of iOS applications running on AWS EC2.
Began working on a driving/racing game with a focus on realistic vehicle simulation, using C++ and Qt for tools.

Technologies: Bullet, OGRE, Box2D, Cocos2d, iOS, OpenGL, 3D Graphics

iOS Developer | Photo/Video Manipulation

2019 - 2021

Tessa Barton LLC

Developed an app focused on image and video editing, which leveraged advanced AVFoundation features.
Developed a small back end that required using the server-side Swift.
Worked on fixing bugs reported by the many users of this app.

Technologies: iOS, Image Manipulation, Video Editing, Swift, AVFoundation, Core Image

iOS Developer

2011 - 2011

Gonow

Developed and maintained a variety of iOS applications.
Developed a home automation app which allows users to control devices in their homes/offices and access live camera feeds.
Wrote code to communicate with SOAP and REST web services.
Wrote an interactive page-flipping algorithm for iPad eBooks. Derived the formulas to implement said algorithm, and used Core Graphics and Core Animation to achieve the desired effects.
Set up physics simulations for a variety of scenes in a digital book using the Box2D physics engine.

Technologies: SQLite, Box2D, Cocos2d, iOS

Mobile Developer

2010 - 2011

Lab360

Developed applications that communicate with REST web services and actively use push notifications.
Set up physics simulations for a variety of scenes in a digital book using the Chipmunk Physics engine.
Wrote a polyline drawing optimization algorithm using a quadtree in order to draw a route on a map, supporting polylines of over 10,000 vertices in real time.
Developed some 3D applications and demos for iPhone and iPad using the Cocos3D engine.
Developed a couple HTML5 graphics samples using its new (at the time) 3D features.

Technologies: Android, Chipmunk, Cocos3d, Cocos2d, iOS

Experience

Edyn | Real-time Physics Engine Organized as ECS

https://github.com/xissburg/edyn

Tezza

https://apps.apple.com/br/app/tezza-aesthetic-photo-editor/id1393061654?l=en-GB

FotoZap

https://picturemarketing.com/apps/

Elevatr (previously Docz)

SplashCam

Pergunter

Developed Pergunter app, which allows you to post questions using photos or videos and share them only with your friends or with the entire Pergunter community in order to find the right answer.

1000 Images

Presents a gallery of paintings by Carlos Araujo.

Pix apps

Developed Pix app, which provides a new dimension to discovering apps using an infinite bidimensional scroll.

Olimpíadas 2012

Allows you to keep updated with the news and status of the 2012 Olympic Games. Sponsored by Caixa.

Marina de la Riva

Menino Maluquinho

Contributed to interactive book for the iPad, with primary involvement in the scenes containing physics simulation (made with Box2d) and the dynamic and interactive page-flipping animation.