About Stoneworx
Stoneworx is a Dutch Mendix partner with its own teams in Soest and Porto. We build and integrate business-critical software with Mendix, for banks, trading companies and organisations with a demanding ERP landscape, among others. Our motto is short: we make complex simple.
Mendix specialists with a preference for practical solutions
Our pioneers have worked with Mendix for more than ten years and have over twenty years of experience in IT: architecture, integrations, cloud and security. Our consultants and architects in the Netherlands know our clients' processes; our developers in the Netherlands and Porto build what is needed.
What drives us is the combination of technical depth and level-headed thinking. No vague promises; clear agreements, open communication and software that does what was agreed.
25+ developers, all employed by Stoneworx
Consultants and architects in the Netherlands, developers in the Netherlands and Porto, and behind them the Mendix Expertise Centre. We do not put photos or names of colleagues on this site. You get to know the people who will work for you in the first conversation, and that is how we prefer it.
As of September 2026: nine Expert-certified colleagues, all other developers Advanced-certified, one Mendix MVP, everyone with at least three years of Mendix experience.
Two offices, one team
Soest is home to our consultants, architects and part of the developers. A large part of our development capacity is in Porto, in an office by the river, within walking distance of the sea. All colleagues in Porto are employed by Stoneworx.
The collaboration dates from 2023. The teams visit each other regularly and work together every day. That is how we really know each other, and how we work as one team. It also makes us flexible: we deliver complete development teams, we scale up quickly when a project asks for it, and we work for clients in the Netherlands and beyond, in Dutch or in English.
What you can check
Mendix Service & Reseller Partner (Silver)
We are an official Mendix partner and may supply Mendix licences.
SNA-certified
Stoneworx B.V. is listed in the register of the Stichting Normering Arbeid (NEN 4400-1), the Dutch labour standards mark for companies that second staff. Voluntary, held for years, and the forerunner of the admission requirement that applies from 1 January 2027 under the Dutch Wtta act.
Mendix MVP
One of our colleagues is a Mendix MVP, a title for developers who demonstrably contribute to the platform and the community.
One company with two faces
Under the name Stoneworx we work as a Mendix partner for our clients. Under the label NEDPT we develop and deliver our own products for trading companies: TradePIM and FieldSales. Those products grew out of our work for clients and can be found at nedpt.com.
Since December 2025 the Dutch and Portuguese organisations have also formally been one, under the name Stoneworx. In practice the teams had already been working together for years.