Hi, I'm Jeroen, a .NET backend developer with a Bachelor's degree in Computer Science who has been building web applications since 2018. I grew from intern to Senior .NET Developer at Arlanet, and I'm now working at 9292 REISinformatiegroep on the journey planner that travellers across the Netherlands use to plan their trips by public transport.
I specialize in custom-made web applications focusing on automation and streamlining of processes. My passion is to work on projects that add value to society and can make the lives of people or organizations better.
I'm based in the Netherlands and work in Dutch and English. Next to my work at 9292 I run the indie game studio Bhurtsoft together with a friend, where we are building our first game with Unity.
When I’m not coding you’ll probably find me playing football, doing fitness, playing the guitar, listening to music, reading a book (preferably science fiction or fantasy) or enjoying the local arthouse cinema.
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At 9292 I work on the backend and APIs behind the journey planner, which powers the 9292 website and apps for planning trips by public transport in the Netherlands. I also work on an internal web application for managing the location data that the journey planner relies on.
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Bhurtsoft is the indie game studio I started together with a friend, next to my job at 9292. We are currently building our first game, Tag: a 2D arena platformer made with Unity.
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I started at Arlanet as an intern in 2018 and grew into a Senior .NET Developer by the time I left in 2025. I worked on projects ranging from custom-made automation and database optimization to corporate websites and Web APIs.
As a senior developer I led the backend development on projects, was the technical point of contact for clients and Product Owners, took care of DevOps and CI/CD, and mentored interns and junior developers. Projects were run using Scrum, together with a Product Owner, a Scrum Master and multiple backend and frontend developers.
A selection of projects I worked on, grouped by employer.
An internal web application for managing the location data that the journey planner relies on.
A lottery whose income goes to the participating sports clubs. During the latest action period the platform handled millions of requests in a single day, and it set new sales records for 5 years in a row.
I created the infrastructure surrounding the lottery: the online page for selling lottery tickets, and the backend environment where clubs prepare for the coming action period. The platform is built with .NET and consists of multiple projects connected through REST APIs.
As lead backend developer I rebuilt the Fair Finance Guide (also known as Eerlijke Geldwijzer) for Oxfam Novib on modern .NET and Umbraco CMS. After the rebuild we renewed the older functionality, including the scoring component. After the initial release I also took care of the DevOps for the projects.
As backend developer for Berenschot I worked on the corporate website, the “My Berenschot” environment and an internal tool, all built with .NET and Umbraco CMS. I also built the .NET REST API backend for a Vue.js application.
The brand website of Bhurtsoft, the indie game studio I run together with a friend. We are currently building our first game, Tag: a 2D arena platformer made with Unity, where you compete against your friends using power-ups.
A practical travel guide/blog based on my own experience while traveling through Asia. This blog is about practical and usable information, about countries with less online information.
The website for Loodgieters Kabel, a plumbing and installation company in Haarlem. A lightweight one-page site that presents the services, recent work and contact details, so customers can get in touch with the plumber directly.
Over the years, I’ve worked with a wide range of technologies across the backend ecosystem. I started out with .NET Framework and moved along with the platform to .NET Core and today's .NET.
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Internship from September 2016 - January 2017 at the Northwestern Polytechnical University in Xi'an, China. During my internship I worked with Nao, a programmable humanoid robot. My task was to make Nao register sound, understand speech and be able to answer questions.