Sebastian Velandia

Sebastian Velandia

Armenia, Colombia

Pro Drupal developer, and enterpreneur

Skills & Experience

  • Company

    grupoly

  • Job Title

    CTO & Co-founder

  • Spoken Languages

    • English
    • Deutsch
    • Spanish
  • Looking for work

    Yes

292 Achievements

  • Ruby Conditionals
  • Structuring Your Content
  • Ruby Numeric Types
  • Ruby Objects
  • Ruby Strings and Escape Sequences
  • Ruby Syntax
  • Getting Started with Android
  • Going Further with HTML
  • Images, Text and Links
  • Getting Started With HTML
  • Working with Text
  • Ordering, Limiting and Paging Results
  • Gems In Depth
  • Ruby Gems
  • A Route to a Delete Action
  • Routes to Update Actions
  • Routes for Create Actions
  • A Route to a Read Action
  • Rails Resource Index
  • Subqueries
  • Set Operations
  • Joining Table Data with SQL
  • Table Relationships
  • Database Keys
  • Database Normalization
  • Handling Errors When Manipulating Data
  • Finding the Data You Want
  • Component Lifecycle
  • Getting Data from a Database
  • Sinatra Finishing Touches
  • Updating Data in Sinatra
  • Adding New Data in Sinatra
  • Sinatra ERB Templates
  • Creating New Sinatra Apps
  • Get Involved in Open Source
  •  Create a Web Presence on GitHub
  • Stateful Components
  • Thinking in Components
  • Table Basics
  • First Steps in React
  •  Working on a Team
  • Working By Yourself
  • Hello, GitHub!
  • Deleting Data from a Database
  • Updating Data in a Database
  • Quiz Practice Project
  • Prototypal Inheritance
  • Constructor Functions & Prototypes
  • DOM Traversal
  • DOM Manipulation
  • Events
  • Hello, jQuery!
  • Traversing the DOM
  • Responding to User Interaction
  • Making Changes to the DOM
  • Getting a Handle on the DOM
  • The Browser Environment
  • Adding Data to a Database
  • Data, Databases and SQL
  • Introduction to Methods
  • Getting Started with Sass
  • Chrome DevTools Basics
  • Selecting Elements and Adding Events with JavaScript
  • JavaScript and the DOM
  • Creating a Spoiler Revealer
  • Going Further with Attribute Selectors and Pseudo-Classes
  • Selectors - Beyond the Basics
  • Choosing Options
  • Organizing Forms
  • Form Basics
  • Better SEO Through Tools
  • Better SEO Through Code
  • Better SEO Through Content
  • Introduction to SEO
  • Ruby Core
  • Ruby Blocks
  • Ruby Booleans
  • Ruby Module Basics
  • Build a Bank Account Class
  • Ruby Variables and Methods
  • Ruby Objects and Classes
  • Adding a New Web Page
  • Build a Simple Contact List
  • Ruby Iteration
  • Ruby Loops
  • Build a Grocery List Program
  • Ruby Hashes
  • Ruby Arrays
  • Ruby Logical Operators
  • Ruby Control Structures
  • Ruby Operators
  • Creating Rails Apps
  • Adding a Model Attribute
  • Using the Rails Console
  • Handling Rails Requests
  • Improving Our Todo App
  • Services in Angular
  • Using Angular's Built-in Directives
  • Controllers and Scope
  • Getting Started with Angular
  • Make It Beautiful with CSS
  • HTML: The Structural Foundation of Web Pages and Applications
  • Getting Familiar with HTML and CSS
  • AJAX and APIs
  • jQuery and AJAX
  • Programming AJAX
  • Final Project: Create a Typographic Site
  • Laying Out Type for the Web
  • Basic Web Typography
  • How to Choose and Use Webfonts
  • Debugging, Best Practices, and Production
  • Refactoring with Sass
  • Installing Sass and Setting up the Project
  • Finalizing the Project
  • Case Studies and Examples
  • The Brand Identity Design Process
  • Introduction to Brand Identity
  • The Logo Sprint
  • Logo Design 101
  • Keyframe and Line Drawing Animations
  • Transitions and Transforms
  • Creating an SVG
  • Introduction to SVG
  • Adding 3D Effects with CSS
  • Getting Started with CSS Transforms
  • Transition Timing Functions and Delays
  • Getting Started with CSS Transitions
  • Save for the Web
  • Adding Images and a Mockup
  • Logo Design
  • Creating a Wireframe
  • Introducing Adobe Illustrator
  • Workspace Basics
  • Design Foundations Final
  • Becoming a Problem Solver
  • Understanding Aesthetics
  • Building a Layout with Flexbox
  • Flexbox Properties
  • Understanding Flexbox
  • Responsive Patterns
  • Media Queries
  • Responsive Theory
  • Positioning Page Content
  • CSS Layout Project
  • Page Layout with the Float Property
  • Controlling Layout with CSS Display Modes
  • Getting Started with CSS Layout
  • Advanced Selectors
  • AJAX Concepts
  • Using AJAX
  • Building the Profile Page
  • Rails Frontend Development
  • PHP Inheritance & Interfaces
  • Slim and Templates
  • Dependency Management
  • PHP Properties & Methods
  • PHP Objects and Classes
  • PHP Internal Functions
  • PHP Returns & Closures
  • PHP Functions Basics
  • PHP Loops
  • PHP Conditionals
  • PHP Datatypes
  • PHP Data & Structure
  • PHP Getting Started
  • Creating a Password Confirmation Form
  • Learn About Drupal
  • Creating a Simple Lightbox
  • Introduction to jQuery
  • Fundamental Concepts
  • Designing with the Latest Features
  • Basic Layout
  • The Box Model
  • Going Mobile
  • Coding HTML Email
  • Designing Email with CSS
  • Understanding Values and Units
  • JavaScript Objects
  • JavaScript Arrays
  • JavaScript Loops
  • JavaScript Functions
  • JavaScript Conditional Statements
  • JavaScript Numbers
  • JavaScript Variables
  • Introducing JavaScript
  • Discovery
  • Coding the API
  • HTML Email Basics
  • Uploading Files
  • Route Connections
  • Introduction to REST
  • Basic Selectors
  • Getting Started with CSS
  • Introduction to Typography
  • Ruby on Rails Authentication
  • Getting Started With Rails
  • Cleanup and Feature Merge
  • Maintaining The Test Suite
  • Polishing Rails Applications
  • Static Pages with Rails
  • Creating an App Tutorial
  • Blank Slates and Rails
  • Email with Rails
  • Modifying Todo Lists
  • Form Builders and Rails
  • Styling Rails Forms
  • Styling Rails Models
  • Ruby on Rails Helpers
  • Rails Partials
  • Styling a Header
  • Sass and Rails
  • Working with Rails Layouts
  • Zurb Foundation on Rails
  • Exterminator
  • Remember Me
  • 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
  • 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
  • Installing a Ruby Development Environment
  • Workflows
  • Working With Remote Repositories
  • Merging
  • Branches
  • Getting Started With Git
  • Why Version Control Matters
  • Installing Programs
  • Environment and Redirection
  • Console Processes
  • Console Users and Permission
  • Moving Around in the Console
  • JavaScript Objects
  • JavaScript Functions
  • JavaScript Arrays
  • JavaScript Numbers
  • JavaScript Strings
  • Introduction Variables
  • Ruby Methods
  • Ruby Numbers (Ruby Basics)
  • Ruby Strings (Ruby Basics)
  • How Ruby Works
  • Functions
  • Objects and Arrays
  • Control Structures
  • Basics
  • Swift Optionals
  • Swift Parameters and Tuples
  • Swift Functions
  • Control Flow
  • Collections
  • Operators
  • Types
  • Variables and Constants
  • 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
  • Newbie