Leonardo Constantino Oliveira

Leonardo Constantino Oliveira

Rio de Janeiro, Brazil

Skills & Experience

  • Company

    21212.com

  • Job Title

    CTO

  • Spoken Languages

    • English
    • Portuguese

263 Achievements

  • Swift Types
  • An Introduction to Swift Programming
  • Design a Better App
  • Graphical User Interfaces
  • Dependency Management
  • PHP Inheritance & Interfaces
  • PHP Properties & Methods
  • PHP Objects and Classes
  • PHP Internal Functions
  • Implementing the Detail View
  • Custom Table View Cells
  • Next Week's Weather
  • Upgrading Stormy
  • Introduction to Table Views
  • Creating Flexible Objects with Protocols
  • Protocols
  • PHP Returns & Closures
  • PHP Functions Basics
  • PHP Loops
  • PHP Conditionals
  • PHP Datatypes
  • PHP Data & Structure
  • PHP Getting Started
  • Refreshing the Data
  • Adding Weather Icons
  • Managing Complexity
  • Interacting With Data From the Web
  • Simple Data Structures
  • Closures in iOS
  • Closures and Closure Expressions
  • Functions as First Class Citizens
  • Refactoring Our Code (Swift)
  • Building the Master and Detail Views (Swift)
  • Building a Music Library and Playlists (Swift)
  • Using a Navigation Controller With Segues (Swift)
  • Working With Multiple View Controllers (Swift)
  • Deploying to a Device
  • Debugging Our App
  • Improving Our User Interface
  • Using a Data Model
  • Views and View Controllers
  • Getting Started with Xcode
  • Swift Value vs Reference Types
  • Swift Properties
  • Swift Inheritance
  • Swift Classes and Objects
  • Swift Structs and their Methods
  • Swift Structs
  • Swift Enums and their Methods
  • Swift Enums
  • Swift Optionals
  • Swift Parameters and Tuples
  • Swift Functions
  • Control Flow
  • Collections
  • Operators
  • Types
  • Variables and Constants
  • Models
  • Controllers
  • Routes and Templates
  • Getting Started with Ember.js
  • Build a Bank Account Class
  • Ruby Variables and Methods
  • Ruby Objects and Classes
  • Animate This (iOS7)
  • Password Resets and Testing
  • Adding User Support to Our Application
  • Password Hashing and Sign-In
  • AR Extensions
  • Callbacks
  • Query Interface
  • Validation
  • Migrations and Relationships
  • Introduction to ActiveRecord
  • Securing and Maintaining a MySQL Database
  • SQL Calculating, Aggregating and Other Functions
  • Joining Relational Data Between Tables in SQL
  • Manipulating Schema with SQL
  • Creating Tables and Manipulating Data with SQL
  • Reading Data from Databases with SQL
  • Installing MySQL Server and MySQL Workbench
  • Introduction to Data, Databases and SQL
  • Build a Todo List Application with Rails 4
  • Installing a Ruby Development Environment
  • JavaScript Objects
  • JavaScript Functions
  • JavaScript Arrays
  • JavaScript Numbers
  • JavaScript Strings
  • Introduction Variables
  • Structuring Tables
  • Table Basics
  • Creating an App Tutorial
  • Blank Slates and Rails
  • Email with Rails
  • Ruby Methods
  • Ruby Numbers (Ruby Basics)
  • Ruby Strings (Ruby Basics)
  • How Ruby Works
  • Spriting with Compass
  • Compass Helper Functions
  • Cleanup and Feature Merge
  • Maintaining The Test Suite
  • Polishing Rails Applications
  • Static Pages with Rails
  • Relating Models
  • Laravel CRUD
  • Validation & Flash Messages
  • Laravel Forms
  • Laravel & Databases
  • Laravel Controllers
  • Laravel Project Setup
  • Laravel Getting Started
  • Compass Layout and Typography
  • Getting Started with Compass
  • Connecting WordPress Plugins with 3rd Party APIs
  • Building a WordPress Plugin Settings Page
  • How WordPress Plugins Work
  • Installing Programs
  • Environment and Redirection
  • Console Processes
  • Console Users and Permission
  • Moving Around in the Console
  • Functions
  • Objects and Arrays
  • Control Structures
  • Basics
  • Advanced Techniques
  • Responsive Design
  • Adaptive Design
  • Fluid Foundation
  • Introduction to Responsive Web Design
  • Forms
  • Tables
  • Objects
  • Links
  • Lists
  • Text
  • Introduction
  • Debugging HTML and CSS Problems
  • Sharing a Website
  • Responsive Web Design and Testing
  • Adding Pages to a Website
  • Styling Web Pages and Navigation
  • Customizing Colors and Fonts
  • CSS: Cascading Style Sheets
  • Creating HTML Content
  • HTML First
  • Beginning HTML and CSS
  • Media Queries
  • CSS Animations
  • Transitions and Transforms
  • Flexbox and Multi-Column Layout
  • Gradients
  • Web Typography
  • Moving Forward with UX
  • Tools UXers Use
  • How UXers Think
  • What Do User Experience Designers Do?
  • What is User Experience (UX)?
  • Backgrounds and Borders
  • Text, Fonts, and Lists
  • Values and Units
  • CSS Box Model
  • Advanced Selectors
  • Selectors
  • Getting Started with CSS
  • Push Updates
  • Activity Feeds
  • Create an Image Gallery
  • Uploading and Resizing Images
  • Uploading Files
  • Managing Friendships
  • Using AJAX
  • Adding State
  • Building the Friendship UI
  • Creating Friendships
  • Rails Deployment
  • Building the Profile Page
  • Testing the Whole App
  • Rails Routing
  • Writing Tests
  • Customizing Ruby on Rails Forms
  • Ruby on Rails Authentication
  • Rails Frontend Development
  • Getting Started With Rails
  • Launching the Website
  • Styling Content
  • Creating a Website Structure
  • Text Editors and HTML
  • Website Basics
  • UIKit Dynamics
  • View Controller Transitions
  • Gestures
  • What is an API?
  • Downloading Data with NSURLSession
  • Collection Views
  • Grid Layout
  • Flexbox Layout
  • Positioning Schemes
  • Float Layout
  • Display Modes
  • Beyond the Basics
  • Advanced Objective-C
  • Foundation Framework
  • Introduction to Objective-C
  • Pointers and Memory
  • Functional Programming in C
  • Fundamentals of C
  • Ruby Testing
  • Standard Library
  • Ruby Core
  • Ruby Modules
  • Ruby Procs & Lambdas
  • Ruby Blocks
  • Ruby Loops
  • Ruby Methods
  • Ruby Hashes
  • Ruby Arrays
  • Ruby Numbers
  • Ruby Strings
  • Objects, Classes, and Variables
  • Ruby Basics
  • Finishing the User Interface
  • Customizing Table View Controllers
  • Using Auto Layout and Managing the Keyboard
  • Implementing Custom Login and Sign Up Screens
  • App Settings
  • API Access
  • Notifications
  • Location
  • Blocks and Categories
  • Appearance
  • iOS 5 Core Data
  • Web View
  • Storyboards
  • Automatic Reference Counting
  • Retrieving and Viewing Data from Parse.com
  • Capturing Photo and Video Using UIImagePickerController
  • Relating Users in Parse.com
  • Using Parse.com as a Backend and Adding Users
  • Designing and Starting the App
  • Viewing a Web Page
  • Adapting Data for Display
  • Data Modeling
  • Getting Data from the Web
  • Rebuilding from Scratch
  • Exploring the Master-Detail Template
  • Testing and Debugging
  • Animate This
  • Designing your App
  • Refactoring into a Model
  • Creating a Data Collection
  • Understanding Views and View Controllers
  • Getting Started (iOS7)
  • Workflows
  • Working With Remote Repositories
  • Merging
  • Branches
  • Getting Started With Git
  • Why Version Control Matters
  • Newbie