Versatile, communicative and energetic.
That seem to be the most used words when you ask customers about Jeroen.
COO
Altix
I worked with Jeroen at Altix and can strongly recommend him for his technical expertise. Jeroen has deep knowledge of backend development, especially PHP and Laravel, and consistently thinks in terms of solid architecture. He pays close attention to performance, security, and long-term maintainability, and makes technical choices that hold up over time.
What stands out is his ability to quickly understand complex technical challenges and translate them into clear, robust solutions. His code is well-structured, readable, and designed to keep systems manageable as they grow.
If you're looking for someone with strong technical depth who takes real ownership of software quality, Jeroen is a very solid choice.
Solution Architect
Jeroen and I first worked together when we were asked to build a platform to change the private equity landscape. Within a month, Jeroen delivered a production-ready platform that is still the foundation of the product three years later.
The platform was written in PHP, Jeroen's area of expertise, and designed using domain-driven design. His code is clean, SOLID, and more often than not makes smart use of relevant design patterns, always supported by thorough automated tests.
Not only is he an excellent developer, he is also highly security-minded, something that is absolutely vital in this day and age.
And last but not least, he's a great person to work with, and, most importantly, he absolutely kills it on the dance floor.
Software Developer
Altix
I had the privilege of working with and being mentored by Jeroen Derks at my first job and he played a huge part in my professional growth. Jeroen is an excellent PHP/Laravel developer with a strong sense for clean, maintainable code, but what really sets him apart is how he combines technical depth with great people skills. He is a natural team player who makes collaboration easy and productive.
One of Jeroen's standout qualities is his ability to think ahead and spot potential issues long before they become real problems. At the same time, he is genuinely open to learning from others and values input from younger team members when they bring new ideas or expertise. That mix of experience, foresight, and humility made him an exceptional mentor and colleague, and I am very grateful for the impact he had on my development.
CEO
SMEX Pte. Ltd.
I've had the pleasure of working closely with Jeroen in his role as CTO and lead developer. He is a rare combination of strong technical depth and clear strategic thinking. He doesn't just write code – he builds systems that are stable, scalable, and commercially sound.
What stands out most is his discipline and reliability. He approaches complex problems methodically, delivers clean solutions, and keeps long-term architecture in mind rather than chasing shortcuts. He also communicates exceptionally well for a technical leader, making collaboration between business and engineering straightforward and efficient.
Any company looking for a CTO or senior technical leader who can take real ownership of a product and build it properly from the ground up would be well served by him.
CTO
Been recently been working with Jeroen on a project to get a legacy PHP application into a position of safety and control. I have to say that the experience has been nothing but exemplary. Jeroen's ability to quickly get under the hood of the application and his commitment to security and working with my internal teams have been a model of how I wish all my third-party relationships worked. I would have absolutely no hesitation in recommending Jeroen in the future as long as he isn't still working for me that is.
General practitioner
I built and managed my own website with a standard program from my provider. When I had to implement additional features on this site, I needed help. I approached Jeroen and he solved this very quickly and professionally. The result was to my wishes as well as the costs for it. The communication went very smoothly and pleasant. I have already prepared a new job for which I am hiring him. Recommended!
Owner
Pregly.com
Jeroen is someone who gets everything done, he is not only very proficient in PHP, but also know a lot of servers, databases and security. Because of his extensive knowledge I always trust him with my projects. He is very clear in his communication and punctual with deliveries.
If you have a chance to work with him, you should definitely take this opportunity!
Project Manager
ABN AMRO
Working with Jeroen was a pleasure. He has strong communication skills and I had the feeling that he was genuinely involved in the project. He put in the hours into the project that were needed to meet the deadlines, which I perceived as very pleasant. He is always looking for a solution, never makes problems and always ends up with a solution. Besides that he is obviously an expert programmer!
Author
'Webshop for Dummies'
A versatile, intelligent person who can communicate normally. Dependable, decisive. During our cooperation I learned a lot from him.
Tester
Telfort
A very knowledgeable person, he was always one step ahead in providing solutions. A pleasure to work with.
Call now +31207775488 to share their experience.
Because of my Zend certification, as a client, you known that I can manage PHP very well and deliver quickly stable websites.
Most websites use a database. Because of my MySQL certification you can rely on me to stored and access your data efficiently, safely and high performantly.
The CISSP certification allows you to trust that my websites are difficult to hack and your data safe.
