Jonathan Dalgaard - Poll Explorer

Q: Where is Jonathan based?

Jonathan is based in Prague, Czech Republic .

Q: What languages does Jonathan speak?

Jonathan speaks the following languages: Danish (Advanced), English (Advanced) .

Q: How many years of experience does Jonathan have?

Jonathan has at least 9 years of experience. During this time, Jonathan has worked in at least 4 different roles and for 12 different companies . The average length of individual experience is 1 year and 7 months . Note that Jonathan may not have shared all experience and actually has more experience.

Q: What is Jonathan's latest experience?

Jonathan's most recent position is Poll Explorer at American Data House .

Q: What companies has Jonathan worked for in recent years?

In recent years, Jonathan has worked for American Data House , SaaS company , Large retail company , and American University .

Q: Which industries is Jonathan most experienced in?

Jonathan is most experienced in industries like Retail , Professional Services , and Information Technology (IT) . Jonathan also has some experience in Education , Media, Entertainment and Publishing , and Tourism and Hospitality .

Q: Which business areas is Jonathan most experienced in?

Jonathan is most experienced in business areas like Information Technology (IT) , Product Development , and Business Intelligence . Jonathan also has some experience in Accounting .

Q: Which industries has Jonathan worked in recently?

Jonathan has recently worked in industries like Retail , Information Technology (IT) , and Professional Services .

Q: Which business areas has Jonathan worked in recently?

Jonathan has recently worked in business areas like Information Technology (IT) , Business Intelligence , and Product Development .

Recommended expert

Prague, Czech Republic

Experience

Jan 2024 - Dec 2025

2 years

Poll Explorer

American Data House

Built complex charts to visualize poll data such as a favorability map to view geographical data
Implemented a tiered pricing model where visitors had limited access to the site
Set up pages and access control in the Orchard Core .NET CMS
Assisted in building Minimal API REST endpoints that exposed the poll data to the front end

Jan 2024 - Dec 2024

1 year

Full-stack Developer

SaaS company

Worked as a full-stack developer on an application launch portal using .NET and React. The portal provided users with one-click access to applications available to their subscription
Used the Duende Backend For Frontend (BFF) framework as a .NET wrapper around React. The BFF framework uses a server side OAuth2 flow and serves as a reverse proxy that allows for client-side authentication without exposing credentials to the front end
Delivered a proof of concept to verify suitability of the BFF framework, leading to initiatives to migrate existing applications to BFF

Jan 2023 - Dec 2024

2 years

Full-stack Developer

Large retail company

Integrated the React checkout flow with a new in-house Java backend
Stabilized the React checkout flow and implemented country-specific features and legal requirements
Built a TypeScript library to validate address fields based on a set of global validation rules, solving discrepancies in validation across applications

Jan 2022 - Dec 2023

2 years

Full-stack Developer

Large retail company

Upgraded from Drupal 8 to 10
Upgraded from PHP 7 to 8
Moved rendering from Drupal to server side rendered React
Redesigned the editor experience
Built test sites using Kubernetes and Jenkins
Imported thousands of products from XML using Drupal Migrate
Provided on-call support of production environments, using Splunk and New Relic to solve critical production incidents

Jan 2021 - Dec 2021

1 year

Full-stack Developer

Large retail company

Built a page to search for jobs within the user’s area using Apache Solr
Refactored the error-prone job posting import

Jan 2020 - Dec 2021

2 years

Developer

American University

Helped refactor the application flow to receive and process applications
Stabilized the application and aided in refactoring to improve data quality and staff workflows

Jan 2020 - Dec 2020

1 year

Full-stack Developer

Investors’ Association

Implemented a new website with a brand new design based on provided wireframes and user journeys
Improved the editor experience and allowed local associations to manage content themselves
Migrated the old membership system into a setup based on Drupal and Reepay for recurring payments

Jan 2020 - Dec 2020

1 year

Full-stack Developer

Learning Management Portal

Developed a website with integration to SCORM simulations
Implemented a login system by integrating with an external authentication provider
Stored sensitive user data outside of the database in an external system via API

Jan 2020 - Dec 2020

1 year

Full-stack Developer

National Library

Worked on integrations to a library system, login systems with OAuth2, and helped create a custom search experience using Apache Solr
Implemented front-end features and back-office customizations with improved media handling and flexible content creation using the Paragraphs module

Jan 2019 - Dec 2019

1 year

Back-end Developer

Digital Print Company

Worked on a large multi-domain portal for a digital print company with many suppliers and customers
Created an automatic invoicing system
Integrated with Navision accounting software and a template system used to create brochures

Jan 2019 - Dec 2019

1 year

Full-stack Developer

Health Portal

Implemented design for a public health portal with articles reserved for medical staff
Hid content behind a login

Jan 2019 - Dec 2019

1 year

Full-stack Developer

Hotel

Created an advanced hotel booking engine built from scratch in Drupal 8 as a headless back end with React as front end
Worked on both the Drupal site and the React site

Jan 2018 - Dec 2018

1 year

Full-stack Developer

Hotel

Created a booking engine and online checkout flow using Drupal Commerce
Integrated with the hotel management system and payment provider

Jan 2018 - Dec 2018

1 year

Developer

National Newspaper

Migrated half a million articles using the Drupal Migration Module Suite to restructure article data dating back 20 years
Future-proofed data and improved user experience in the rebranded design

Jan 2017 - Dec 2017

1 year

Full-stack Developer

Tax Consultancy Organization

Set up Drupal 8, implemented designs, built layout, and provided various support tasks

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Retail (4 years), Professional Services (3 years), Information Technology (2 years), Education (2 years), Media and Entertainment (2 years), and Tourism (2 years).

Retail

Professional Services

Information Technology

Education

Media and Entertainment

Tourism

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (9 years), Product Development (5 years), Business Intelligence (2 years), and Accounting (1 year).

Information Technology

Product Development

Business Intelligence

Accounting

Summary

I am a very focused and self-driven developer with strong analytical skills and a get-things-done mentality.

I have a deep understanding of web development best practices, OOP principles, advanced problem solving, team cooperation and task management.

Working on large and complex projects has helped me grow immensely as a developer to the point where I feel comfortable taking on any back-end or front-end task.

I am used to working in development teams using scrum methodology.

Skills

Drupal
Javascript / Typescript
Php
Jquery
React
Css3 And Sass
Mysql
Git
Node.js
Github / Bitbucket / Gitlab
Html5 / Twig
Atlassian Jira
Asp.net
Back End: Drupal 7, 8, 9, 10, 11
Back End: Php
Back End: Mysql / Postgresql
Back End: Node.js
Back End: Express
Back End: Apache / Nginx
Back End: Rest Api
Back End: Soap
Back End: Nest.js
Back End: Asp.net / C#
Back End: Orchard Cms + Liquid
Back End: Strapi Cms
Front End: Javascript
Front End: Html5 / Twig
Front End: Css3 / Sass
Front End: Jquery
Front End: React.js
Front End: Typescript
Front End: Ajax
Front End: Vue
Front End: Next.js
Front End: Webpack / Vite / Turbopack
Front End: .Net Blazor
Devops: Docker
Devops: Kubernetes
Devops: Jenkins
Devops: Command Line (Unix)
General: Git
General: Neovim
General: Lua
General: Rust
General: Shell Scripting
General: Json
General: Macos
General: Oauth 2.0
General: New Relic
General: Splunk

Languages

Danish

Advanced

English

Advanced

Education

General Educational Development · General Educational Development

Profile

Created

December 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Jonathan based?

Jonathan is based in Prague, Czech Republic.

What languages does Jonathan speak?

Jonathan speaks the following languages: Danish (Advanced), English (Advanced).

How many years of experience does Jonathan have?

Jonathan has at least 9 years of experience. During this time, Jonathan has worked in at least 4 different roles and for 12 different companies. The average length of individual experience is 1 year and 7 months. Note that Jonathan may not have shared all experience and actually has more experience.

What roles would Jonathan be best suited for?

Based on recent experience, Jonathan would be well-suited for roles such as: Poll Explorer, Full-stack Developer, Developer.

What is Jonathan's latest experience?

Jonathan's most recent position is Poll Explorer at American Data House.

What companies has Jonathan worked for in recent years?

In recent years, Jonathan has worked for American Data House, SaaS company, Large retail company, and American University.

Which industries is Jonathan most experienced in?

Jonathan is most experienced in industries like Retail, Professional Services, and Information Technology (IT). Jonathan also has some experience in Education, Media, Entertainment and Publishing, and Tourism and Hospitality.

Which business areas is Jonathan most experienced in?

Jonathan is most experienced in business areas like Information Technology (IT), Product Development, and Business Intelligence. Jonathan also has some experience in Accounting.

Which industries has Jonathan worked in recently?

Jonathan has recently worked in industries like Retail, Information Technology (IT), and Professional Services.

Which business areas has Jonathan worked in recently?

Jonathan has recently worked in business areas like Information Technology (IT), Business Intelligence, and Product Development.

What is Jonathan's education?

Jonathan attended education in General Educational Development.

What is the availability of Jonathan?

Jonathan is immediately available full-time for suitable projects.

What is the rate of Jonathan?

Jonathan's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.