Bjørn is available for hire

Bjørn Dons

Verified Expert in Engineering

Software Developer

Location

Aarhus, Denmark

Toptal Member Since

March 11, 2022

Bjørn is a full-cycle developer with a deep understanding of the entire software environment, leaving no stone unturned when investigating root causes. He particularly enjoys researching performance issues in large and complex applications, designing database schemas, and writing performance-optimized SQL. Bjørn is also experienced and well-read in development management and is currently the de facto tech lead of a multinational team of seven developers.

Cloudflare Java SQL PostgreSQL PHP Python Laravel Regex Linux Git MySQL REST APIs Amazon Web Services (AWS)PostGIS C#.NET

Portfolio

Generaxion

Cloudflare, Git, Laravel, Linux, NGINX, JetBrains, Amazon Web Services (AWS)...

Self-employed

Java, Python, SQL, JavaScript, HTML, Linux, Git

Experience

SQL - 7 years JetBrains - 6 years Git - 5 years PostgreSQL - 5 years Linux - 5 years Cloudflare - 4 years Python - 4 years Laravel - 3 years

Availability

Part-time

Preferred Environment

PostgreSQL, Cloudflare, Java, Laravel, Linux, Ubuntu Server, PhpStorm, JetBrains

The most amazing...

...project I've developed is a multiplayer game, GeoGuessr, that I used to learn a lot about PostGIS.

Work Experience

Back-end Developer

2019 - 2022

Generaxion

Implemented strong architectural principles in an internal web application to scale development from a solo effort to a multi-national team of up to eight developers.
Took charge of developing an extensive web application when the previous developers suddenly left the company.
Introduced static analysis in the development workflow, bringing a significant reduction in the number of post-deployment bug fixes than previously required.

Technologies: Cloudflare, Git, Laravel, Linux, NGINX, JetBrains, Amazon Web Services (AWS), Amazon EC2, Symfony, MySQL, APIs

Competitive Programmer

2014 - 2018

Self-employed

Wrote software in both Java and Python, primarily for personal projects.
Competed on many popular competitive programming websites, landing in the top position on many.
Gained experience with many skills needed for rapid software development, including Git, Linux, Auth flows, API integrations, and more.

Technologies: Java, Python, SQL, JavaScript, HTML, Linux, Git

Experience

Awesome Funtime Game

https://funtime.gman.bot

A multiplayer take on GeoGussr for my friends and me.

This project's panoramas from around the world let players guess where the image is taken. Then, it uses PostGIS to calculate the distance between the player's guess and the correct location, awarding points, and ladder rating the best players.

OPNX.DK

http://www.opnx.dk

I developed and maintained a web application for displaying insights into marketing data from various sources such as Google Ads, Facebook Ads and pages, Instagram, GBP, and more. This project required me to stay updated with the rapidly evolving third-party APIs and many different error states requiring a well-developed error reporting and handling pipeline.

Skills

Languages

Java, Python, PHP, SQL, Regex, JavaScript, C#.NET, HTML

Frameworks

Laravel, Tailwind CSS, Symfony

Paradigms

Object-oriented Programming (OOP)

Storage

PostgreSQL, MySQL, PostGIS

Other

Cloudflare, APIs, Ubuntu Server, Geospatial Data, Email, CI/CD Pipelines

Libraries/APIs

REST APIs

Tools

Git, NGINX, PhpStorm, JetBrains

Platforms

Linux, Amazon Web Services (AWS), Amazon EC2

Collaboration That Works

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