What we shipped, and what it taught us.
Our newest work is AI in production, so that comes first. After that, you will find twenty years of notes on security, legacy systems and keeping software running long after it was built.
Two new things, one way of working.
The launch article of the Enigmatry SaaS Factory, and EnigmaSure: proof that you can leave your cloud, every month.
Your prototype is a spec, not a product
Lovable and Claude let anyone put a working app on screen in a weekend. That moved the hard part — and that is where we built the SaaS Factory.
Read14 October 2026 New · EnigmaSureOwn your future, not just your data
Escrow, a monthly restore drill on a second European cloud, and signed reports for DORA and the Data Act.
Read14 October 2026AI in production
AI that people use in the middle of their working day, and the engineering behind it.
Yessa
Our own software for veterinary practices, with an AI assistant that helps during the consult. We built AI into our own product first, so we can talk about the trade-offs, not just the capabilities: what it drafts, what the vet checks, and where the vet decides.
yessa.nl Case · NextensTEX
A fiscal AI assistant that searches tens of thousands of rulings and links every answer back to its source.
Read the case Case · De Rolf GroepKai
An AI guide inside a teacher-training platform, with clear guardrails instead of an open chat box.
Read the case CaseAI-driven complaint handling
AI that sorts complaints and drafts replies, so people get a faster and correct answer.
Read the case CaseBreaking language barriers with AI
AI translation for parking, so people can understand their situation in their own language.
Read the case56 cases and articles, twenty years, one team.
Newest first. Filter by what you are dealing with. Every piece is on this site now, in both languages where we wrote both.
From work item to pull request.
The SaaS Factory's production line in full: the roles, the sandbox, the evidence rule, the second review, the limits and the switches. An engineer approves every merge.
Read29 October 2026Article · New productsYour prototype is a spec, not a product
Lovable and Claude let anyone put a working app on screen in a weekend. That is the best thing to happen to product ideas in years. It also moved the…
Read14 October 2026Article · SecurityEnigmaSure: own your future, not just your data
Most organisations could not leave their cloud if they had to. Regulators, boards and auditors have started asking for proof that they can.…
Read14 October 2026Article · How we buildA coding agent is not a model.
The model is only half of a coding agent. We spent the past year on the other half: everything around the model. We call it Harness Engineering.
Read23 September 2026Article · How we buildAgentic technical debt.
This debt looks clean and passes every check, while the team slowly stops understanding its own code. Here is what it looks like, and which gate catches it.
Read23 September 2026Article · SecurityWhy our developers never see production data.
Long before the GDPR and coding agents, we kept production data out of our developers’ reach. That choice now protects our clients in the AI era too.
Read23 September 2026Article · How we buildWorking across borders.
One team, two countries, no time difference. This is what a working day looks like with colleagues in Rotterdam, Novi Sad and Belgrade.
Read23 September 2026Article · AI in production
Yessa: where the vet decides.
Yessa is our own software for veterinary practices, with an AI assistant that helps during the consult. The most important design choice was not what it can do, but where it stops.
Read23 September 2026Case · AI in production
AI complaint handling.
A proof of concept in which AI sorts incoming complaints and drafts a reply.
Read14 July 2026Article · AI in production
E2E tests with AI.
A good end-to-end test takes a senior engineer one to two hours. With AI, it takes a fraction of that, without cutting corners on quality.
Read14 July 2026Case · AI in production · FlexOn
FlexOn
A new system for recording study results at Windesheim, built for flexible, personalised study programmes.
Read4 June 2026Article · AI in productionMulti-Tiered Architecture and AI
We build our software in clear layers, supported by our own Entry toolbox. That keeps applications maintainable and scalable, and makes it easier to add AI.
Read14 July 2026Article · AI in production
Breaking Language Barriers with AI
Parking rules are hard to follow if you do not speak Dutch. We built an AI translation system that makes the permit application clear in any language.
Read14 July 2026Case · AI in production · De Rolf GroepKai: AI Chatbot
Imagine an AI that understands your professional journey and guides your growth like a mentor. Welcome to Kai.
Read14 July 2026Case · AI in production · Nextens
Tex: Fiscal AI Assistant
A fiscal AI assistant for Nextens that searches tens of thousands of rulings and links every answer back to its source.
Read14 July 2026Case · How we build
Entry: our open-source foundation.
Building a web application from scratch takes time and money. Entry is our open-source foundation that gives every project a head start.
Read29 July 2024Case · Case · P1
P1: parking permits for every municipality.
Every Dutch municipality has its own parking rules. For P1, we built one flexible system for parking permits that adapts to each of them.
Read29 July 2024Case · New products · YessaYessa.
Yessa is our own software for veterinary practices: one place for patient records, appointments, medication and X-rays.
Read22 October 2024Article · Legacy
How long does software last?
Most organisations expect software to last five to ten years. In practice, a new system can feel outdated within two. Here is why, and what you can do about it.
Read24 May 2024Article · SecurityThe OWASP Top 10.
New technology brings new vulnerabilities. The OWASP Top 10 lists the most common ones, and we build every application to withstand them.
Read22 May 2024Article · SecurityMore secure than the neighbours.
We regularly receive questions from clients about software security. How many measures should we take, and how far should we go? This question seems quite simple, but the answer is often more complex than expected.
Read22 May 2024Article · SecuritySecurity by design.
In a world where digital security is crucial, Security By Design takes centre stage at Enigmatry.
Read22 May 2024Article · New productsA partnership with De Rolf Groep.
Our director looks back on building Mijn Academie, an online learning platform, together with De Rolf Groep.
Read21 May 2024Article · New productsKim Bakker on working with Enigmatry.
Since 2020, De Rolf Groep and Enigmatry have built a learning platform for education and care professionals together. Here is how it went, in their words.
Read10 June 2024Article · Your own softwareCustom software as a strategic advantage.
Instead of fighting competitors head-on, the Blue Ocean strategy looks for open water. Custom software is one of the best ways to find it.
Read22 May 2024Article · LegacyTime to replace your software?
When software stops working well, you can improve it or replace it. These five signs tell you which one you need.
Read21 May 2024Article · How we buildAgile management.
Why wait for a big release? We treat an application’s lifecycle as one continuous process, with small updates going live several times a day.
Read22 May 2024Article · Your own softwareHow does custom software development work?
Custom software always starts with a question, not with code. Here is how we get from that question to working software.
Read22 May 2024Article · Your own softwareGetting started with custom software.
Custom software should fit your needs exactly, and that starts with the right developers. Here is what to look out for before you begin.
Read10 June 2024Article · Your own softwareOur approach to digital innovation.
Innovation starts with thinking like an entrepreneur. That is how we have built custom software for our clients for twenty years.
Read22 May 2024Case · Case · P1A multi-tenant back office for P1.
P1 used a separate copy of its system for every municipality. We replaced them with one flexible back office that still feels unique to each municipality.
Read21 May 2024Case · New products · WeAuction
WeAuction: from idea to platform.
WeAuction wanted to make auctions more accessible. We helped turn that idea into a working platform.
Read21 May 2024Case · Case · PameijerMy digital workplace. Always available.
Healthcare workers on the road need up-to-date client information, but it was spread across different systems. We brought it together in one record that is always available.
Read21 May 2024Case · Case · Rijkswaterstaat · FOSIMFosim: traffic flows, visualised.
Fosim is one of Rijkswaterstaat’s key tools. We made sure it keeps running on today’s systems, and is ready for the future.
Read21 May 2024Case · New products · WeAuction
High-end auctions, online.
A platform that lets businesses run their own auctions, online or on location, with every bidder taking part in real time.
Read24 May 2024Case · Case · DJI
DJI: reporting on forensic care.
A portal that gives the Ministry of Justice and Security clear insight into the quality of forensic care.
Read22 May 2024Case · Case · EZCrypto
Fluctuating crypto value. Valuable portal.
To create a clear overview for a broad group of users of the development of various portfolios of highly fluctuating crypto coins.
Read21 May 2024Case · Case · ThiemeMeulenhoffNT2 Online: a Dutch learning platform.
A digital platform where people learn Dutch as a second language, with course methods for different groups of learners.
Read22 May 2024Case · Case · RELX
RELX: a specialist team for Nextens.
RELX employs thousands of IT professionals, but the Nextens team still needed more capacity. We put together a team of specialists that fits in with the permanent team in Amsterdam.
Read21 May 2024Case · Case · Badotherm
Precise calculations for specialist instruments.
Badotherm makes specialist measuring instruments. We built software that calculates precisely how they react under very different conditions.
Read21 May 2024Case · Case · HTM
A measuring tram, full of data.
HTM’s measuring tram collects huge amounts of data along the track. We made that data easy to understand, to help prevent incidents on RandstadRail.
Read21 May 2024Case · Case · EBO
EBO: IoT for traffic management.
How a traditional family business set itself apart in the competitive market for traffic management systems.
Read21 May 2024Case · Case · NS
The NS Mobility Scan.
Get a quick and clear overview of the benefits of an NS-Business Card subscription per person.
Read21 May 2024Article · LegacyEnigmatry as a service.
The shortage of IT professionals keeps growing. Here is an alternative to waiting for the right hire.
Read1 July 2026Case · Case · DGBKGovernment information, made accessible.
A knowledge base that makes a large amount of government information easy for anyone to find and understand.
Read22 May 2024Case · Case · LVTDSensitive information. Thorough reporting.
Anti-discrimination services handle sensitive reports every day. We built a system that registers them efficiently and reports on them clearly.
Read21 May 2024Case · Case · SDU
External maintenance. Loyal partners.
How can a customer-supplier relationship grow into a true partnership?
Read3 June 2025Case · Case · NS
Forecasting train travel for NS.
NS needs to know how many people will travel by train in the future. We built a system that combines forecasting models into one clear picture.
Read30 May 2024Case · Case · SBSValuable goods, tracked on the road.
An IoT system that shows where valuable products are being transported, and under what conditions.
Read3 June 2024Article · LegacyThe solution for outdated software.
Technology moves fast, and the people who know your old systems eventually leave. Here is how to deal with that knowledge gap.
Read3 June 2024Article · Your own softwareA digital workplace for healthcare providers.
An app that helps healthcare teams work together more easily, on any device. We built it with input from dozens of healthcare professionals.
Read10 June 2024Article · LegacyReplace old software.
Old software keeps running until it doesn’t. When support fades and the one person who knows the system leaves, it is time to act.
Read22 May 2024Case · Case · Your Own SpaceYOS: one app for students.
Your Own Space brings students, study coaches and teachers together in one app, so support reaches students sooner.
Read27 May 2024Case · Case
Team as a service.
Good developers are hard to find. We provide complete, well-matched teams that are ready to start.
Read22 May 2024Case · Case · De Rolf GroepKlasMastr: training for teachers.
An online learning platform with training and courses for teachers and childcare professionals, built with De Rolf Groep since 2020.
Read28 May 2024Article · SecuritySecurity baseline.
Every project starts from the same proven foundation, so security is never left to chance.
Read22 May 2024Nothing here for this filter yet.
The deck, if you want the whole argument
A short presentation on Harness Engineering, the same one we use to introduce our own engineers to agentic delivery. Just ask, no form needed.
Or see who we work for.
Twenty years of software for rail, parking, justice, publishing, education, healthcare and manufacturing.
Written by the people who did the work.
Our engineers write about their own projects, including what went wrong, because that is often the most useful part. If a piece raises a question, you will get an answer from the person who knows most about it.
Our expertise · twenty years of notes