Grzegorz Zielinski

Grzegorz Zielinski

Shropshire, United Kingdom

5,838

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

    • Polish
    • English

  • Looking for work

    Yes

68 Achievements

  • Achievement

    Working with 'for' Loops

    JavaScript Loops

    Achieved

    Jun 25, 2020

    Working with 'for' Loops
  • Achievement

    Simplify Repetitive Tasks with Loops

    JavaScript Loops

    Achieved

    Jun 20, 2020

    Simplify Repetitive Tasks with Loops
  • Achievement

    Understanding Promises

    Asynchronous Programming with JavaScript

    Achieved

    Jun 17, 2020

    Understanding Promises
  • Achievement

    Types and Branching

    Python Basics

    Achieved

    Jun 16, 2020

    Types and Branching
  • Achievement

    Meet Python

    Python Basics

    Achieved

    Jun 11, 2020

    Meet Python
  • Achievement

    Asynchronous JavaScript with Callbacks

    Asynchronous Programming with JavaScript

    Achieved

    Jun 4, 2020

    Asynchronous JavaScript with Callbacks
  • Achievement

    What is Asynchronous Programming?

    Asynchronous Programming with JavaScript

    Achieved

    May 28, 2020

    What is Asynchronous Programming?
  • Achievement

    Programming AJAX

    AJAX Basics

    Achieved

    May 26, 2020

    Programming AJAX
  • Achievement

    AJAX Concepts

    AJAX Basics

    Achieved

    May 24, 2020

    AJAX Concepts
  • Achievement

    Traversing the DOM

    JavaScript and the DOM (Retiring)

    Achieved

    May 17, 2020

    Traversing the DOM
  • Achievement

    Responding to User Interaction

    Interacting with the DOM

    Achieved

    May 15, 2020

    Responding to User Interaction
  • Achievement

    Making Changes to the DOM

    JavaScript and the DOM (Retiring)

    Achieved

    May 13, 2020

    Making Changes to the DOM
  • Achievement

    Exploration

    Web Design Process

    Achieved

    May 12, 2020

    Exploration
  • Achievement

    Discovery

    Web Design Process

    Achieved

    May 12, 2020

    Discovery
  • Achievement

    Getting a Handle on the DOM

    JavaScript and the DOM (Retiring)

    Achieved

    May 11, 2020

    Getting a Handle on the DOM
  • Achievement

    JavaScript Tools and Workflows

    The Landscape of JavaScript

    Achieved

    May 10, 2020

    JavaScript Tools and Workflows
  • Achievement

    JavaScript is Everywhere

    The Landscape of JavaScript

    Achieved

    May 10, 2020

    JavaScript is Everywhere
  • Achievement

    The Browser Environment

    JavaScript and the DOM (Retiring)

    Achieved

    May 9, 2020

    The Browser Environment
  • Achievement

    Advanced Selectors

    CSS Selectors

    Achieved

    May 8, 2020

    Advanced Selectors
  • Achievement

    Going Further with Attribute Selectors and Pseudo-Classes

    CSS Selectors

    Achieved

    May 7, 2020

    Going Further with Attribute Selectors and Pseudo-Classes
  • Achievement

    Selectors - Beyond the Basics

    CSS Selectors

    Achieved

    May 5, 2020

    Selectors - Beyond the Basics
  • Achievement

    JavaScript Objects

    JavaScript Loops, Arrays and Objects

    Achieved

    May 3, 2020

    JavaScript Objects
  • Achievement

    JavaScript Arrays

    JavaScript Loops, Arrays and Objects

    Achieved

    Apr 30, 2020

    JavaScript Arrays
  • Achievement

    JavaScript Loops

    JavaScript Loops, Arrays and Objects

    Achieved

    Apr 27, 2020

    JavaScript Loops
  • Achievement

    GitHub and Other Remote Repositories

    Introduction to Git

    Achieved

    Apr 26, 2020

    GitHub and Other Remote Repositories
  • Achievement

    Managing Committed Files

    Introduction to Git

    Achieved

    Apr 25, 2020

    Managing Committed Files
  • Achievement

    First Commits

    Introduction to Git

    Achieved

    Apr 25, 2020

    First Commits
  • Achievement

    Choosing Options

    HTML Forms

    Achieved

    Apr 19, 2020

    Choosing Options
  • Achievement

    Organizing Forms

    HTML Forms

    Achieved

    Apr 17, 2020

    Organizing Forms
  • Achievement

    Form Basics

    HTML Forms

    Achieved

    Apr 17, 2020

    Form Basics
  • Achievement

    Lists, Code, Links and Images

    Markdown Basics

    Achieved

    Apr 17, 2020

    Lists, Code, Links and Images
  • Achievement

    Understanding Markdown

    Markdown Basics

    Achieved

    Apr 16, 2020

    Understanding Markdown
  • Achievement

    Building a Layout with Flexbox

    CSS Flexbox Layout

    Achieved

    Apr 16, 2020

    Building a Layout with Flexbox
  • Achievement

    Flexbox Properties

    CSS Flexbox Layout

    Achieved

    Apr 15, 2020

    Flexbox Properties
  • Achievement

    Understanding Flexbox

    CSS Flexbox Layout

    Achieved

    Apr 14, 2020

    Understanding Flexbox
  • Achievement

    Responsive Patterns

    Responsive Layouts

    Achieved

    Apr 14, 2020

    Responsive Patterns
  • Achievement

    Media Queries

    Responsive Layouts

    Achieved

    Apr 14, 2020

    Media Queries
  • Achievement

    Responsive Theory

    Responsive Layouts

    Achieved

    Apr 14, 2020

    Responsive Theory
  • Achievement

    Positioning Page Content

    CSS Layout Basics

    Achieved

    Apr 10, 2020

    Positioning Page Content
  • Achievement

    CSS Layout Project

    CSS Layout Basics

    Achieved

    Apr 8, 2020

    CSS Layout Project
  • Achievement

    Page Layout with the Float Property

    CSS Layout Basics

    Achieved

    Apr 8, 2020

    Page Layout with the Float Property
  • Achievement

    Controlling Layout with CSS Display Modes

    CSS Layout Basics

    Achieved

    Apr 7, 2020

    Controlling Layout with CSS Display Modes
  • Achievement

    Getting Started with CSS Layout

    CSS Layout Basics

    Achieved

    Apr 6, 2020

    Getting Started with CSS Layout
  • Achievement

    Arrow Functions

    JavaScript Functions

    Achieved

    Apr 5, 2020

    Arrow Functions
  • Achievement

    Pass Information Into Functions

    JavaScript Functions

    Achieved

    Apr 5, 2020

    Pass Information Into Functions
  • Achievement

    Create Reusable Code with Functions

    JavaScript Functions

    Achieved

    Apr 3, 2020

    Create Reusable Code with Functions
  • Achievement

    The Math Object

    JavaScript Numbers

    Achieved

    Apr 2, 2020

    The Math Object
  • Achievement

    Working with Numbers

    JavaScript Numbers

    Achieved

    Apr 2, 2020

    Working with Numbers
  • Achievement

    Making Decisions in Your Code with Conditional Statements

    JavaScript Basics

    Achieved

    Apr 1, 2020

    Making Decisions in Your Code with Conditional Statements
  • Achievement

    Working With Strings

    JavaScript Basics

    Achieved

    Mar 31, 2020

    Working With Strings
  • Achievement

    Storing and Tracking Information with Variables

    JavaScript Basics

    Achieved

    Mar 29, 2020

    Storing and Tracking Information with Variables
  • Achievement

    Hello, JavaScript!

    JavaScript Basics

    Achieved

    Mar 29, 2020

    Hello, JavaScript!
  • Achievement

    Fundamental Concepts

    CSS Basics (2014)

    Achieved

    Mar 24, 2020

    Fundamental Concepts
  • Achievement

    Designing with the Latest Features

    CSS Basics (2014)

    Achieved

    Mar 23, 2020

    Designing with the Latest Features
  • Achievement

    Basic Layout

    CSS Basics (2014)

    Achieved

    Mar 18, 2020

    Basic Layout
  • Achievement

    The Box Model

    CSS Basics (2014)

    Achieved

    Mar 16, 2020

    The Box Model
  • Achievement

    Understanding Values and Units

    CSS Basics (2014)

    Achieved

    Mar 15, 2020

    Understanding Values and Units
  • Achievement

    Basic Selectors

    CSS Basics (2014)

    Achieved

    Mar 13, 2020

    Basic Selectors
  • Achievement

    Getting Started with CSS

    CSS Basics (2014)

    Achieved

    Mar 12, 2020

    Getting Started with CSS
  • Achievement

    Going Further with HTML

    HTML Basics

    Achieved

    Mar 11, 2020

    Going Further with HTML
  • Achievement

    Images, Text and Links

    HTML Basics

    Achieved

    Mar 9, 2020

    Images, Text and Links
  • Achievement

    Structuring Your Content

    HTML Basics

    Achieved

    Mar 8, 2020

    Structuring Your Content
  • Achievement

    Getting Started With HTML

    HTML Basics

    Achieved

    Mar 7, 2020

    Getting Started With HTML
  • Achievement

    Adding a New Web Page

    Introduction to HTML and CSS

    Achieved

    Mar 7, 2020

    Adding a New Web Page
  • Achievement

    Make It Beautiful with CSS

    Introduction to HTML and CSS

    Achieved

    Mar 7, 2020

    Make It Beautiful with CSS
  • Achievement

    HTML: The Structural Foundation of Web Pages and Applications

    Introduction to HTML and CSS

    Achieved

    Mar 7, 2020

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

    Getting Familiar with HTML and CSS

    Introduction to HTML and CSS

    Achieved

    Mar 6, 2020

    Getting Familiar with HTML and CSS
  • Achievement

    Newbie

    Achieved

    Mar 6, 2020

    Newbie