About
Flex25.
A Dutch product company building tools that get out of the way — for the people doing essential work.
- 01Story
- 02Team
- 03Partners
- 04Together
Software through collaboration.
Flex25 combines platform development with domain knowledge from partners who know their sector from the inside. With UIplay and TallKing Results, we translate process knowledge into scalable products — practical, human, grounded in the real world.
We pick fields where the work is demanding and the software is outdated, then we build for the people inside them. We start by listening, prototype early, and refine with the people who use the software every day. No unnecessary features, no bloated platforms — just focused tools that solve real problems.
A small group, deep craft.
Product, engineering, sales and domain — building side by side with our partners.
Martin keeps the engine running at Flex25. With a sharp eye for process and people, he makes sure every product team has the room and the rhythm to do work they are proud of.
Jan brings years of experience guiding organizations through complex, regulated environments via TallKing Results. In healthcare and services, he saw how systems multiplied while the undercurrent received too little attention.
Ronelle is a founder and CEO with 26 years leading a technology company — building products, leading teams, and shaping how organisations adopt technology that works.
Ruben brings deep international product and technology experience from UIPlay, where large-scale platforms are built for organizations that operate 24/7, across countries and cultures.
Built with partners who know the terrain.
A project and advisory bureau in the care sector on a mission to bring the human element back into healthcare — through project management, social domain programmes, and training.
Visit TallKing Results →
26 years of software innovation — AI-powered engagement, payment solutions, and enterprise-grade security. Reliable, scalable platforms organisations depend on every day.
Visit UiPlay →Together.
Have a problem worth solving? We'd like to hear about it.