Roald Jurrian Kamman
seal-mask

Roald Jurrian Kamman

Techdegree Graduate

San Juan
Open to Work

I'm a digital nomad originally from the Netherlands with a background in Sales and Marketing.

15,544

Total Points

Points are earned whenever you take an important action on Treehouse.
Learn more about when and how points are earned.

Skills & Experience

  • Spoken Languages

    • English, Dutch
    • English, Dutch

123 Achievements

  • Achievement

    Combining Array Methods

    JavaScript Array Iteration Methods

    Achieved

    Jun 10, 2020

    Combining Array Methods
  • Achievement

    Array Manipulation

    JavaScript Array Iteration Methods

    Achieved

    Jun 9, 2020

    Array Manipulation
  • Achievement

    Array Iteration

    JavaScript Array Iteration Methods

    Achieved

    Jun 9, 2020

    Array Iteration
  • Achievement

    Callbacks and the DOM

    Callback Functions in JavaScript

    Achieved

    Jun 8, 2020

    Callbacks and the DOM
  • Achievement

    Callbacks with Timers

    Callback Functions in JavaScript

    Achieved

    Jun 8, 2020

    Callbacks with Timers
  • Achievement

    Imposter Syndrome

    Imposter Syndrome

    Achieved

    Jun 8, 2020

    Imposter Syndrome
  • Achievement

    Introduction to Callback Functions

    Callback Functions in JavaScript

    Achieved

    Jun 8, 2020

    Introduction to Callback Functions
  • Achievement

    Going Further with Grid Layout

    CSS Grid Layout

    Achieved

    May 7, 2020

    Going Further with Grid Layout
  • Achievement

    Flexible Sized Grids

    CSS Grid Layout

    Achieved

    May 7, 2020

    Flexible Sized Grids
  • Achievement

    Introducing Grid Layout

    CSS Grid Layout

    Achieved

    May 6, 2020

    Introducing Grid Layout
  • Achievement

    Keyframe and Line Drawing Animations

    Animating SVG with CSS

    Achieved

    May 4, 2020

    Keyframe and Line Drawing Animations
  • Achievement

    Transitions and Transforms

    Animating SVG with CSS

    Achieved

    Apr 23, 2020

    Transitions and Transforms
  • Achievement

    Creating an SVG

    SVG Basics

    Achieved

    Apr 22, 2020

    Creating an SVG
  • Achievement

    Introduction to SVG

    SVG Basics

    Achieved

    Apr 22, 2020

    Introduction to SVG
  • Achievement

    Improving the Application Code

    DOM Scripting By Example

    Achieved

    Apr 2, 2020

    Improving the Application Code
  • Achievement

    Editing and Filtering Names

    DOM Scripting By Example

    Achieved

    Apr 2, 2020

    Editing and Filtering Names
  • Achievement

    Adding and Removing Names

    DOM Scripting By Example

    Achieved

    Apr 2, 2020

    Adding and Removing Names
  • Achievement

    Exploring Async/Await

    Asynchronous Programming with JavaScript

    Achieved

    Mar 5, 2020

    Exploring Async/Await
  • Achievement

    Understanding Promises

    Asynchronous Programming with JavaScript

    Achieved

    Mar 5, 2020

    Understanding Promises
  • Achievement

    Getters and Setters

    Object-Oriented JavaScript

    Achieved

    Mar 4, 2020

    Getters and Setters
  • Achievement

    Working with Classes in JavaScript

    Object-Oriented JavaScript

    Achieved

    Mar 4, 2020

    Working with Classes in JavaScript
  • Achievement

    Object Basics

    Object-Oriented JavaScript

    Achieved

    Mar 3, 2020

    Object Basics
  • Achievement

    Introduction to Object-Oriented JavaScript

    Object-Oriented JavaScript

    Achieved

    Mar 2, 2020

    Introduction to Object-Oriented JavaScript
  • Achievement

    Asynchronous JavaScript with Callbacks

    Asynchronous Programming with JavaScript

    Achieved

    Feb 24, 2020

    Asynchronous JavaScript with Callbacks
  • Achievement

    What is Asynchronous Programming?

    Asynchronous Programming with JavaScript

    Achieved

    Feb 20, 2020

    What is Asynchronous Programming?
  • Achievement

    The Math Object

    JavaScript Numbers

    Achieved

    Feb 20, 2020

    The Math Object
  • Achievement

    Working with Numbers

    JavaScript Numbers

    Achieved

    Feb 20, 2020

    Working with Numbers
  • Achievement

    Programming AJAX

    AJAX Basics

    Achieved

    Feb 20, 2020

    Programming AJAX
  • Achievement

    Making Decisions in Your Code with Conditional Statements

    JavaScript Basics

    Achieved

    Feb 19, 2020

    Making Decisions in Your Code with Conditional Statements
  • Achievement

    Working With Strings

    JavaScript Basics

    Achieved

    Feb 19, 2020

    Working With Strings
  • Achievement

    Storing and Tracking Information with Variables

    JavaScript Basics

    Achieved

    Feb 19, 2020

    Storing and Tracking Information with Variables
  • Achievement

    Hello, JavaScript!

    JavaScript Basics

    Achieved

    Feb 19, 2020

    Hello, JavaScript!
  • Achievement

    Arrow Functions

    JavaScript Functions

    Achieved

    Feb 19, 2020

    Arrow Functions
  • Achievement

    AJAX Concepts

    AJAX Basics

    Achieved

    Feb 19, 2020

    AJAX Concepts
  • Achievement

    Pass Information Into Functions

    JavaScript Functions

    Achieved

    Feb 18, 2020

    Pass Information Into Functions
  • Achievement

    Create Reusable Code with Functions

    JavaScript Functions

    Achieved

    Feb 18, 2020

    Create Reusable Code with Functions
  • Achievement

    Captioning Video

    HTML Video and Audio

    Achieved

    Feb 18, 2020

    Captioning Video
  • Achievement

    Media Basics

    HTML Video and Audio

    Achieved

    Feb 18, 2020

    Media Basics
  • Achievement

    Combine and Minify Assets

    Introduction to Front End Performance Optimization

    Achieved

    Feb 18, 2020

    Combine and Minify Assets
  • Achievement

    Optimize Assets

    Introduction to Front End Performance Optimization

    Achieved

    Feb 18, 2020

    Optimize Assets
  • Achievement

    Measuring Performance

    Introduction to Front End Performance Optimization

    Achieved

    Feb 18, 2020

    Measuring Performance
  • Achievement

    Planning for Performance

    Introduction to Front End Performance Optimization

    Achieved

    Feb 18, 2020

    Planning for Performance
  • Achievement

    Building Forms With Bootstrap

    Bootstrap Basics

    Achieved

    Feb 17, 2020

    Building Forms With Bootstrap
  • Achievement

    Using Bootstrap Components

    Bootstrap Basics

    Achieved

    Feb 17, 2020

    Using Bootstrap Components
  • Achievement

    Responsive Layouts With the Bootstrap Grid

    Bootstrap Basics

    Achieved

    Feb 17, 2020

    Responsive Layouts With the Bootstrap Grid
  • Achievement

    Getting to Know Bootstrap 4

    Bootstrap Basics

    Achieved

    Feb 15, 2020

    Getting to Know Bootstrap 4
  • Achievement

    Responsive Patterns

    Responsive Layouts

    Achieved

    Feb 12, 2020

    Responsive Patterns
  • Achievement

    Media Queries

    Responsive Layouts

    Achieved

    Feb 12, 2020

    Media Queries
  • Achievement

    Responsive Theory

    Responsive Layouts

    Achieved

    Feb 12, 2020

    Responsive Theory
  • Achievement

    Traversing the DOM

    JavaScript and the DOM (Retiring)

    Achieved

    Feb 12, 2020

    Traversing the DOM
  • Achievement

    Using a jQuery Carousel

    Using jQuery Plugins

    Achieved

    Jan 11, 2020

    Using a jQuery Carousel
  • Achievement

    Add a Sticky Navigation Bar

    Using jQuery Plugins

    Achieved

    Jan 11, 2020

    Add a Sticky Navigation Bar
  • Achievement

    Introducing jQuery Plugins

    Using jQuery Plugins

    Achieved

    Jan 7, 2020

    Introducing jQuery Plugins
  • Achievement

    Working with jQuery Collections (2017)

    jQuery Basics

    Achieved

    Jan 6, 2020

    Working with jQuery Collections (2017)
  • Achievement

    Understanding jQuery Events and DOM Traversal (2017)

    jQuery Basics

    Achieved

    Jan 6, 2020

    Understanding jQuery Events and DOM Traversal (2017)
  • Achievement

    Introducing jQuery (2017)

    jQuery Basics

    Achieved

    Jan 5, 2020

    Introducing jQuery (2017)
  • Achievement

    Responding to User Interaction

    Interacting with the DOM

    Achieved

    Dec 12, 2019

    Responding to User Interaction
  • Achievement

    Making Changes to the DOM

    JavaScript and the DOM (Retiring)

    Achieved

    Dec 11, 2019

    Making Changes to the DOM
  • Achievement

    Getting a Handle on the DOM

    JavaScript and the DOM (Retiring)

    Achieved

    Dec 10, 2019

    Getting a Handle on the DOM
  • Achievement

    The Browser Environment

    JavaScript and the DOM (Retiring)

    Achieved

    Dec 10, 2019

    The Browser Environment
  • Achievement

    JavaScript Objects

    JavaScript Loops, Arrays and Objects

    Achieved

    Dec 9, 2019

    JavaScript Objects
  • Achievement

    JavaScript Arrays

    JavaScript Loops, Arrays and Objects

    Achieved

    Dec 6, 2019

    JavaScript Arrays
  • Achievement

    JavaScript Loops

    JavaScript Loops, Arrays and Objects

    Achieved

    Dec 4, 2019

    JavaScript Loops
  • Achievement

    JavaScript Functions

    JavaScript Basics (Retired)

    Achieved

    Dec 2, 2019

    JavaScript Functions
  • Achievement

    JavaScript Conditional Statements

    JavaScript Basics (Retired)

    Achieved

    Nov 30, 2019

    JavaScript Conditional Statements
  • Achievement

    JavaScript Numbers

    JavaScript Basics (Retired)

    Achieved

    Nov 29, 2019

    JavaScript Numbers
  • Achievement

    5 Star Techdegree Reviewer

    Achieved

    Nov 27, 2019

    5 Star Techdegree Reviewer
  • Achievement

    1st Techdegree Peer Review

    Achieved

    Nov 27, 2019

    1st Techdegree Peer Review
  • Achievement

    JavaScript Variables

    JavaScript Basics (Retired)

    Achieved

    Nov 27, 2019

    JavaScript Variables
  • Achievement

    Introducing JavaScript

    JavaScript Basics (Retired)

    Achieved

    Nov 27, 2019

    Introducing JavaScript
  • Achievement

    Finishing the Game

    Introducing JavaScript

    Achieved

    Nov 27, 2019

    Finishing the Game
  • Achievement

    Introducing JavaScript

    Introducing JavaScript

    Achieved

    Nov 24, 2019

    Introducing JavaScript
  • Achievement

    JavaScript Tools and Workflows

    The Landscape of JavaScript

    Achieved

    Nov 24, 2019

    JavaScript Tools and Workflows
  • Achievement

    JavaScript is Everywhere

    The Landscape of JavaScript

    Achieved

    Nov 24, 2019

    JavaScript is Everywhere
  • Achievement

    Installing Sass and Setting up the Project

    CSS to Sass

    Achieved

    Nov 18, 2019

    Installing Sass and Setting up the Project
  • Achievement

    Add Reusable Logic to Your Sass

    Sass Basics

    Achieved

    Nov 15, 2019

    Add Reusable Logic to Your Sass
  • Achievement

    Write Smart and Efficient CSS with Sass

    Sass Basics

    Achieved

    Nov 14, 2019

    Write Smart and Efficient CSS with Sass
  • Achievement

    Improve Your Workflow with Sass

    Sass Basics

    Achieved

    Nov 13, 2019

    Improve Your Workflow with Sass
  • Achievement

    Getting Started with Sass

    Sass Basics

    Achieved

    Nov 12, 2019

    Getting Started with Sass
  • Achievement

    Adding 3D Effects with CSS

    CSS Transitions and Transforms

    Achieved

    Nov 11, 2019

    Adding 3D Effects with CSS
  • Achievement

    Getting Started with CSS Transforms

    CSS Transitions and Transforms

    Achieved

    Nov 3, 2019

    Getting Started with CSS Transforms
  • Achievement

    Transition Timing Functions and Delays

    CSS Transitions and Transforms

    Achieved

    Nov 3, 2019

    Transition Timing Functions and Delays
  • Achievement

    Getting Started with CSS Transitions

    CSS Transitions and Transforms

    Achieved

    Nov 3, 2019

    Getting Started with CSS Transitions
  • Achievement

    GitHub and Other Remote Repositories

    Introduction to Git

    Achieved

    Nov 2, 2019

    GitHub and Other Remote Repositories
  • Achievement

    Managing Committed Files

    Introduction to Git

    Achieved

    Nov 2, 2019

    Managing Committed Files
  • Achievement

    First Commits

    Introduction to Git

    Achieved

    Nov 2, 2019

    First Commits
  • Achievement

    Common Commands

    Introduction to the Terminal

    Achieved

    Oct 28, 2019

    Common Commands
  • Achievement

    Directories and Files

    Introduction to the Terminal

    Achieved

    Oct 28, 2019

    Directories and Files
  • Achievement

    The Command Shell

    Introduction to the Terminal

    Achieved

    Oct 26, 2019

    The Command Shell
  • Achievement

    Building a Layout with Flexbox

    CSS Flexbox Layout

    Achieved

    Oct 23, 2019

    Building a Layout with Flexbox
  • Achievement

    Flexbox Properties

    CSS Flexbox Layout

    Achieved

    Oct 23, 2019

    Flexbox Properties
  • Achievement

    Understanding Flexbox

    CSS Flexbox Layout

    Achieved

    Oct 23, 2019

    Understanding Flexbox
  • Achievement

    Advanced Selectors

    CSS Selectors

    Achieved

    Oct 22, 2019

    Advanced Selectors
  • Achievement

    Going Further with Attribute Selectors and Pseudo-Classes

    CSS Selectors

    Achieved

    Oct 21, 2019

    Going Further with Attribute Selectors and Pseudo-Classes
  • Achievement

    Selectors - Beyond the Basics

    CSS Selectors

    Achieved

    Oct 21, 2019

    Selectors - Beyond the Basics
  • Achievement

    Choosing Options

    HTML Forms

    Achieved

    Oct 14, 2019

    Choosing Options
  • Achievement

    Organizing Forms

    HTML Forms

    Achieved

    Oct 14, 2019

    Organizing Forms
  • Achievement

    Form Basics

    HTML Forms

    Achieved

    Oct 14, 2019

    Form Basics
  • Achievement

    Structuring Tables

    HTML Tables

    Achieved

    Oct 12, 2019

    Structuring Tables
  • Achievement

    Table Basics

    HTML Tables

    Achieved

    Oct 12, 2019

    Table Basics
  • Achievement

    Positioning Page Content

    CSS Layout Basics

    Achieved

    Oct 8, 2019

    Positioning Page Content
  • Achievement

    CSS Layout Project

    CSS Layout Basics

    Achieved

    Oct 7, 2019

    CSS Layout Project
  • Achievement

    Page Layout with the Float Property

    CSS Layout Basics

    Achieved

    Oct 6, 2019

    Page Layout with the Float Property
  • Achievement

    Controlling Layout with CSS Display Modes

    CSS Layout Basics

    Achieved

    Oct 4, 2019

    Controlling Layout with CSS Display Modes
  • Achievement

    Getting Started with CSS Layout

    CSS Layout Basics

    Achieved

    Oct 4, 2019

    Getting Started with CSS Layout
  • Achievement

    Fundamental Concepts

    CSS Basics (2014)

    Achieved

    Sep 26, 2019

    Fundamental Concepts
  • Achievement

    Designing with the Latest Features

    CSS Basics (2014)

    Achieved

    Sep 26, 2019

    Designing with the Latest Features
  • Achievement

    Basic Layout

    CSS Basics (2014)

    Achieved

    Sep 24, 2019

    Basic Layout
  • Achievement

    The Box Model

    CSS Basics (2014)

    Achieved

    Sep 24, 2019

    The Box Model
  • Achievement

    Understanding Values and Units

    CSS Basics (2014)

    Achieved

    Sep 23, 2019

    Understanding Values and Units
  • Achievement

    Basic Selectors

    CSS Basics (2014)

    Achieved

    Sep 20, 2019

    Basic Selectors
  • Achievement

    Getting Started with CSS

    CSS Basics (2014)

    Achieved

    Sep 20, 2019

    Getting Started with CSS
  • Achievement

    Going Further with HTML

    HTML Basics

    Achieved

    Sep 18, 2019

    Going Further with HTML
  • Achievement

    Images, Text and Links

    HTML Basics

    Achieved

    Sep 18, 2019

    Images, Text and Links
  • Achievement

    Structuring Your Content

    HTML Basics

    Achieved

    Sep 17, 2019

    Structuring Your Content
  • Achievement

    Getting Started With HTML

    HTML Basics

    Achieved

    Sep 17, 2019

    Getting Started With HTML
  • Achievement

    Using Slack Effectively

    Slack for the Techdegree

    Achieved

    Sep 17, 2019

    Using Slack Effectively
  • Achievement

    Introducing Slack for the Techdegree

    Slack for the Techdegree

    Achieved

    Sep 17, 2019

    Introducing Slack for the Techdegree
  • Achievement

    Adding a New Web Page

    Introduction to HTML and CSS (2016)

    Achieved

    Sep 17, 2019

    Adding a New Web Page
  • Achievement

    Make It Beautiful with CSS

    Introduction to HTML and CSS (2016)

    Achieved

    Sep 17, 2019

    Make It Beautiful with CSS
  • Achievement

    HTML: The Structural Foundation of Web Pages and Applications

    Introduction to HTML and CSS (2016)

    Achieved

    Sep 17, 2019

    HTML: The Structural Foundation of Web Pages and Applications
  • Achievement

    Getting Familiar with HTML and CSS

    Introduction to HTML and CSS (2016)

    Achieved

    Sep 15, 2019

    Getting Familiar with HTML and CSS
  • Achievement

    Newbie

    Achieved

    Sep 15, 2019

    Newbie