stjarnan
seal-mask

stjarnan

Techdegree Graduate

Sundsvall, Sweden

Hi, my name is Jonas. I successfully landed a job after Treehouse. Feel free to connect with me on LinkedIn!

56,486

Total Points

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Skills & Experience

  • Company

    Sogeti

  • Job Title

    Software Engineer

631 Achievements

  • Subqueries
  • Set Operations
  • Joining Table Data with SQL
  • Table Relationships
  • Database Keys
  • Database Normalization
  • Date and Time Functions
  • Aggregate and Numeric Functions
  • Working with Text
  • Ordering, Limiting and Paging Results
  • Handling Errors When Manipulating Data
  • Deleting Data from a Database
  • Updating Data in a Database
  • Adding Data to a Database
  • Finding the Data You Want
  • Getting Data from a Database
  • Data, Databases and SQL
  • Adding the Game Logic
  • Making the Game Interactive
  • Rendering the Game
  •  Building Constructor Methods and Generating Objects
  • Introducing 'Four in a Row'
  • Additional Scraping Tasks
  • A World Full of Spiders
  • Introducing Data Scraping
  • Selecting Relevant Data
  • Handling Bad Data
  • “Clean” or “Dirty” Data
  • Exploring pandas
  • Meet pandas
  • Array Programming
  • Array Organization
  • Meet NumPy
  • Data Eruption
  • Chart Toppers
  • Getting Started with Data Visualization
  • The Data Analysis Process
  • Getting to Know Your Data
  • Introducing Data Analysis
  • Practicing Data Visualization in Excel
  • Chart Formatting and Layout
  • When To Use What Type of Chart
  • Introduction To Data Visualization
  • Build a Spreadsheet
  • Spreadsheet Best Practices
  • Spreadsheet Functions & Formulas
  • Getting Started With Spreadsheets
  • Introducing Spreadsheets
  • Build an Application
  • Using Lists
  • Meet Lists
  • All Together Now
  • Functions and Looping
  • Types and Branching
  • Meet Python
  • Branches on Git Hosting Services
  • Remote Branches
  • Merging
  • Branches
  • GitHub and Other Remote Repositories
  • Managing Committed Files
  • First Commits
  • Recursion and Space Complexity
  • Algorithms in Code
  • Time Complexity
  • How to Critique Design
  • Practice Functions
  • Writing a Classifier
  • Machine Learning Vocabulary
  • Introduction to Machine Learning
  • Interactivity in Adobe XD
  • Prototyping Designs in Adobe XD
  • Introducing Adobe XD
  • Improving Quality Assurance Practices
  • Bug Reporting
  • Executing Tests
  • Writing Manual Test Cases
  • Why We Test
  • React Component Patterns
  • Stateful Components and Lifecycle Methods
  • Managing State and Data Flow
  • Build Modular Interfaces with Components
  • Building a Flashcard App
  • Sweeping Vues: Loops, Methods, Directives
  • What a Beautiful Vue!
  • Introducing Vue
  • Stateful Components
  • Introducing Props
  • Thinking in Components
  • First Steps in React
  • Practicing Getters and Setters
  • Practicing Classes
  • Playing a Counting Game
  • Persuasive Patterns
  • UI Patterns
  • Designing with Patterns
  • Applying IA
  • Evaluating IA
  • Main Principles
  • What is Information Architecture?
  • Planning Your Users’ Journey
  • Strategy: Determining Goals for your Product
  • Understanding Our Users
  • Intro to User Experience (UX) Design
  • The Design Solution
  • The Design Problem
  • Design Principles
  • What is Product Design?
  • Telling the Story
  • Designing for your User’s "To-be"
  • Understanding your User’s “As-is” Scenario
  • Becoming Acquainted with Your User
  • Becoming a Design Thinker
  • Getters and Setters
  • Working with Classes in JavaScript
  • Object Basics
  • Introduction to Object-Oriented JavaScript
  • Callbacks and the DOM
  • Callbacks with Timers
  • Introduction to Callback Functions
  • Getting the REST You Need 2
  • JavaScript Frameworks, Libraries, and Developer Roles
  • JavaScript Outside of the Browser
  • JavaScript Objects and Conditionals
  • JavaScript Arrays and Loops
  • JavaScript Functions
  • Data Types and Variables
  • JavaScript Tools and Workflows
  • JavaScript is Everywhere
  • 5th Techdegree Peer Review
  • 1st Techdegree Peer Review
  • 5 Star Techdegree Reviewer
  • Putting it all Together
  • Actions, Dispatch and Reducers. Oh my!
  • Modularizing the React Scoreboard Application
  • Getting Started with Redux
  • Going Further with Routing
  • Navigating, Nesting and Redirecting Routes
  • Getting Started with React Router
  • Refining the App
  • Building the Application
  • Setting up with Create React App
  • Component Lifecycle
  • Designing Dataflow
  • Working with jQuery Collections (2017)
  • Introducing jQuery (2017)
  • Understanding jQuery Events and DOM Traversal (2017)
  • Using the Discovery Service
  • Using the Conversation Service
  • Introducing the Watson APIs
  • Save for the Web
  • Adding Images and a Mockup
  • Logo Design
  • Creating a Wireframe
  • Introducing Adobe Illustrator
  • Practice forEach
  • Start menu and App Icon
  • Sound Design
  • Animating and Saving Sprites
  • Designing Characters and a Scene
  • Introduction to Game Design
  • Building Forms With Bootstrap
  • Using Bootstrap Components
  • Responsive Layouts With the Bootstrap Grid
  • Getting to Know Bootstrap 4
  • Create Function Using Arrow Syntax
  • Using Template Literals
  • Defining Variables With let and const
  • Finishing the Game
  • Introducing JavaScript
  • Lists, Code, Links and Images
  • Understanding Markdown
  • Create a Banner Ad
  • Hello, Photoshop!
  • Digital Media Basics
  • Day 3: Getting Creative
  • Day 2: Advanced Selecting
  • Day 1: Joining Tables
  • Orientation: Selecting Data
  • Exploring Best Practices
  • Test Drive
  • Meet Selenium
  • Security in Practice
  • Common Attacks and Defenses
  • Hello Internet!
  • Dockerize a Web App
  • Managing Images and Containers
  • Building Images Using Dockerfiles
  • Fundamentals of Docker
  • Docker Use Cases
  • Combining Array Methods
  • Array Manipulation
  • Array Iteration
  • Reusable GraphQL
  • Making Changes with Mutations
  • Fetching Data with Queries
  • Getting Started with GraphQL
  • Team Collaboration in Figma
  • Prototyping Designs in Figma
  • Introducing Figma
  • Serving Static Files in Express
  • Applying Express Knowledge
  • Middleware
  • Deeper into Routing with Express
  • Using Templates with Express
  • Going Further with HTML
  • Images, Text and Links
  • Structuring Your Content
  • Getting Started With HTML
  • Getting Started with Express
  • Rehearsal and Delivery
  • Creating and Refining
  • Preparing to Present
  • Design Patterns
  • Page Layout
  • Exploration
  • Discovery
  • Big Data at Netflix
  • Where and How Big Data Is Used
  • What is Big Data
  • CRUD Operations
  • LINQ Queries
  • Extending Our Entity Data Model
  • Entity Framework and Databases
  • Introducing Entity Framework
  • Go Concurrency Overview
  • Go Custom Types Overview
  • Go Data Structures Overview
  • Go Flow Control Overview
  • Go Syntax Overview
  • API Protection
  • Resourceful Blueprints
  • Tacocat Challenge
  • How to Win Friends
  • Broadcasting
  • Takin' Names
  • Making Strong Users
  • Character Builder
  • Flask Templates
  • Welcome to Flask
  • Covering Your Bases
  • Be Assertive!
  • What Is Testing?
  • Gettin' CRUD-y With It
  • Our Diary App
  • Meet Peewee
  • Python Regular Expressions
  • Timezones
  • Math Quiz App
  • Dates and Times
  • Buggy Logs
  • Cleaner Code
  • Dice Roller
  • Python: Advanced Objects
  • Python: Inheritance
  • Python: Instant Objects
  • Dungeon Game 2
  • Python Sets
  • Python Tuples
  • Python Dictionaries
  • Python Slices
  • Python Lists
  • Security: Solutions
  • Security: Concerns
  • Interactive Visualizations
  • Styling and Scaling Data
  • Data Binding with D3
  • Applying & Interviewing
  • The Job Search
  • Networking
  • Personal Branding
  • Setting Your Course
  • Careers in the Tech Industry
  • Self-Assessment
  • Selections with D3
  • Final Project: Create a Typographic Site
  • Laying Out Type for the Web
  • Basic Web Typography
  • How to Choose and Use Webfonts
  • Introduction to Typography
  • Adding 3D Effects with CSS
  • Getting Started with CSS Transforms
  • Transition Timing Functions and Delays
  • Getting Started with CSS Transitions
  • Modular Media Queries
  • Sass Grid System
  • SMACSS and Sass
  • Sass and BEM
  • Getting Modular with Mixins and Functions
  • Add Reusable Logic to Your Sass
  • Write Smart and Efficient CSS with Sass
  • Improve Your Workflow with Sass
  • Getting Started with Sass
  • Testing for Accessibility
  • Mobile Accessibility
  • Accessible UI Patterns
  • Semantic HTML and WAI-ARIA
  • WCAG 2.0 (and Other Standards)
  • Access for Everybody
  • Scrum Artifacts
  • Scrum Events
  • Introducing Scrum
  • What is Agile?
  • Going Mobile
  • Designing Email with CSS
  • Coding HTML Email
  • HTML Email Basics
  • What is the MailChimp API
  • Working with a Developer
  • Designing our App
  • Wireframing, Interaction Design and Planning
  • ADS Writing and Preparation
  • Introduction to UI Design
  • Improving Usability
  • Mobile Usability
  • Website Usability
  • What is Usability?
  • Protecting and Sharing Your Work
  • Licensing
  • Fair Use and Public Domain
  • Getting Started with Copyright
  • Soft Skills - Psychology
  • Writing Online
  • Productivity
  • Presentation Skills
  • Important Skills For Professional Success
  • Website Basics
  • Treehouse Club - JavaScript
  • Treehouse Club - CSS
  • WWW
  • The Internet
  • Computer Languages
  • Computer Basics
  • What's New in Foundation 5
  • Build a Website With Foundation
  • Prototyping With Foundation
  • Build a Website With Bootstrap
  • Prototyping With Bootstrap
  • DNS Basics
  • Graphic Basics
  • Introduction to Front-End Frameworks
  • Letter Game App
  • Number Game App
  • Shopping List App
  • Optimization Best Practices
  • Asset Optimization
  • Logic in Python
  • Why Web Performance Matters
  • More TODO with the MEAN Stack
  • Creating and Editing Data in a MEAN App
  • Setting Up MongoDB
  • Going MEAN with Angular
  • Going MEAN with Express
  • Introduction to MEAN
  • Python Data Types
  • Python For Beginners
  • Chrome DevTools Basics
  • Captioning Video
  • Media Basics
  • Building Forms with Bootstrap
  • Using Bootstrap Components
  • Responsive Layouts with the Bootstrap Grid
  • Getting to Know Bootstrap 4
  • Responsive Patterns
  • Media Queries
  • Responsive Theory
  • Next Steps
  • Improving Our Tests
  • Behavior Driven Development with Mocha & Chai
  • Introducing Unit Testing
  • Creating a Command Line Weather Application
  • Handling Errors in Node
  • Getting Data From an API With Node
  • Introduction to Node.js
  • Improving the Application Code
  • Editing and Filtering Names
  • Adding and Removing Names
  • 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
  • Classes
  • Objects and New Collection Types
  • The Cooler Parts of ES2015
  • ES2015 Basics
  • Angular Form Validation
  • Angular Basic Forms
  • Services in Angular
  • Angular Components
  • Setting Up an Angular Application
  • Stateful Components
  • Thinking in Components
  • First Steps in React
  • Adding a List Page
  • Modeling and Presenting Data
  • Views
  • Controllers
  • Project Setup
  • GET and POST Requests in a Browser
  • Introduction to HTTP
  • Adding a New Web Page
  • Make It Beautiful with CSS
  • HTML: The Structural Foundation of Web Pages and Applications
  • Getting Familiar with HTML and CSS
  • Loops and Final Touches
  • Encapsulation with Properties
  • Encapsulation and Arrays
  • Inheritance
  • Methods
  • Object-Oriented Programming
  • Perfect
  • Perform
  • Console I/O
  • Prepare and Plan
  • Get Involved in Open Source
  •  Create a Web Presence on GitHub
  •  Working on a Team
  • Working By Yourself
  • Hello, GitHub!
  • Professional Development
  • Express Middleware
  • Sessions and Cookies
  • User Registration and Login
  • What is Authentication?
  • Completing and Testing the API
  • Communicating with Mongo Through Mongoose
  • Modeling Data for the API
  • Building API Routes in Express
  • Building a REST Service
  • Doing More with Express
  • Serving Static Files in Express
  • Using Templates with Express
  • The Request and Response Objects in Express
  • Developing Express Apps Like a Boss
  • Getting Started with Express
  • Getting the REST You Need
  • Go Further With Mongo
  • Working With Collections
  • Understanding MongoDB
  • Getting Started with MongoDB
  • HTTP Methods and Headers
  • Creating a Basic Template Engine in Node.js
  • Handling Routes in Node.js
  • Creating a Simple Server in Node.js
  • Combine and Minify Assets
  • Optimize Assets
  • Measuring Performance
  • Planning for Performance
  • Improving your Gulp Workflow
  • Compile Sass with Gulp
  • Gulp your JavaScript workflow!
  • Welcome to Gulp.js
  • Updating and Uninstalling Packages with npm
  • Installing Packages with npm
  • What is npm?
  • Building a Command Line Application
  • Introduction to Node.js
  • AJAX and APIs
  • jQuery and AJAX
  • Programming AJAX
  • AJAX Concepts
  • Web Apps
  • Websites
  • Introduction
  • Custom Media Players
  • Captioning Video
  • Media Basics
  • Quiz Practice Project
  • Prototypal Inheritance
  • Constructor Functions & Prototypes
  • Introduction to Methods
  • Traversing and Manipulating the DOM with JavaScript
  • Selecting Elements and Adding Events with JavaScript
  • JavaScript and the DOM
  • Keyframe and Line Drawing Animations
  • Transitions and Transforms
  • Introduction to SVG
  • Building a Layout with Flexbox
  • Flexbox Properties
  • Understanding Flexbox
  • Debugging, Best Practices, and Production
  • Refactoring with Sass
  • Installing Sass and Setting up the Project
  • Using a jQuery Carousel
  • Add a Sticky Navigation Bar
  • Introducing jQuery Plugins
  • Creating a Simple Drawing Application
  • Creating a Password Confirmation Form
  • Advanced Selectors
  • Going Further with Attribute Selectors and Pseudo-Classes
  • Selectors - Beyond the Basics
  • Art Direction with the Picture Element
  • Image Delivery with Srcset and Sizes
  • Positioning Page Content
  • CSS Layout Project
  • Page Layout with the Float Property
  • Controlling Layout with CSS Display Modes
  • Getting Started with CSS Layout
  • Creating an SVG
  • Creating a Mobile Drop Down Menu
  • Workflows
  • Working With Remote Repositories
  • Merging
  • Welcome to the Treehouse Club
  • 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
  • Creating a Simple Lightbox
  • Creating a Spoiler Revealer
  • Introduction to jQuery
  • JavaScript Objects
  • JavaScript Arrays
  • JavaScript Loops
  • MASH JavaScript
  • MASH CSS
  • MASH HTML
  • JavaScript Functions
  • JavaScript Conditional Statements
  • JavaScript Numbers
  • JavaScript Variables
  • Fundamental Concepts
  • Designing with the Latest Features
  • Basic Layout
  • The Box Model
  • Understanding Values and Units
  • Basic Selectors
  • Getting Started with CSS
  • Introducing JavaScript
  • Functions
  • Objects and Arrays
  • Control Structures
  • Basics
  • Spriting with Compass
  • Compass Helper Functions
  • Compass Layout and Typography
  • Getting Started with Compass
  • Advanced Sass Concepts
  • Speeding up Workflow With Sass
  • Variables, Mixins, and Extending Selectors
  • Getting Started with Sass
  • Better SEO Through Tools
  • Better SEO Through Code
  • Better SEO Through Content
  • Introduction to SEO
  • Moving Forward with UX
  • Tools UXers Use
  • How UXers Think
  • What Do User Experience Designers Do?
  • What is User Experience (UX)?
  • Finalizing the Project
  • Case Studies and Examples
  • The Brand Identity Design Process
  • Introduction to Brand Identity
  • The Logo Sprint
  • Logo Design 101
  • Creating Home Page Assets
  • Applying Effects
  • How to Draw in Illustrator
  •  Adding Color and Type
  • Creating an Icon
  • Introduction to Illustrator
  • Workflow Basics
  • Slices & Save for Web
  • Vector Shapes
  • Type Tools
  • Masks Basics
  • Structuring Tables
  • Table Basics
  • Choosing Options
  • Organizing Forms
  • Form Basics
  • Layer Basics
  • Workspace Basics
  • Design Foundations Final
  • Becoming a Problem Solver
  • Understanding Aesthetics
  • Introduction to Design
  • Color Theory
  • Principles
  • Elements
  • Grid Layout
  • Flexbox Layout
  • Positioning Schemes
  • Float Layout
  • Display Modes
  • Media Queries
  • CSS Animations
  • Transitions and Transforms
  • Flexbox and Multi-Column Layout
  • Gradients
  • Web Typography
  • Backgrounds and Borders
  • CSS Box Model
  • Text, Fonts, and Lists
  • Values and Units
  • 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
  • Advanced Selectors
  • Selectors
  • Getting Started with CSS
  • Forms
  • Tables
  • Objects
  • Links
  • Lists
  • Text
  • Introduction
  • Launching the Website
  • Styling Content
  • Creating a Website Structure
  • Text Editors and HTML
  • Website Basics
  • Newbie