Custom software development · Amsterdam · Since 2011
Custom Software Development Amsterdam — YOUR PRODUCT TEAM
WITHOUT THE HEADCOUNT.
We build, run, and improve the software your business depends on every month.
One monthly commitment. No surprises.
One team across development, architecture, testing, maintenance, and product thinking. Built on years of engineering experience, now faster than yesterday with AI.
DWS is the right partner for you if you want your business to grow.
We work with small and medium businesses whose revenue depends on a web or mobile product.
Most agencies build what you ask for and move on. We don't work that way.
Four ways
we work with you.
01
Product Partnership
You have a running product. We take ownership of the technical layer with you.
Learn more02
New Product Build
You have a validated idea. We spread the build over a fixed monthly commitment.
Learn more03
Digital Pilot
One problem, one solution, two to four weeks. A lower-risk way to start.
Learn more04
Maintenance & Security
Your product is live. We keep it running, monitored, updated, and secure.
Learn moreOne monthly commitment.
No hourly billing.
No surprises.
We stopped billing by the hour. When you pay by the hour, everyone watches the clock. Nobody is thinking about the product.
A fixed monthly fee changes the conversation. You know what you're spending. We know the relationship runs on what we build, not on time logged.
OUR WORK
How Inboxroad grew accounts by 3101% by replacing a manual onboarding process.
Read
How Klimaatroute cut report writing time by 80% and gave advisors their day back.
Read
How SRPRS.me automated 80% of its bookings and freed the operations team to focus on growth.
Read
How a noise monitoring app helped Arcadis reduce community resistance to wind parks.
ReadWHAT CLIENTS
SAY.
We build long-term partnerships. Here's what the people we work with say about it.
"We moved from a system full of manual work to one that grows with the business. The team now spends that time on work that actually moves things forward."
SJSymen Jansma
CEO · Inboxroad
"What sets DWS apart is that they think ahead. They come with ideas about where the product should go, not just what you asked them to build."
MMMatthijs van Meerkerk
Senior Consultant · Arcadis
"Years of data had made our product progressively slower. DWS helped us scale the platform and get performance back to where our users expected it."
JGJeroen Greuter
Product Manager · Nationale Postcode Loterij
"Our advisors were spending over two hours per report before this. Now it takes around 30 minutes. That time adds up fast across a team."
NRNoah Ras
Teamlead IT · Klimaatroute
"80% of our bookings now complete on their own without anyone on the team touching them. Our people work on different things now. Better things."
ANAnneke Nijenhuis
Operations Lead · SRPRS.me
We are Django and Python specialists.
We're not a generalist agency. We're specialists who have seen the same patterns for fifteen years, and we bring that to everything we do.
Software is about pipes. What matters is what goes into the pipes and what comes out. Business idea in, value for happy customers out. We take care of the pipes.
GEERT DEKKERS · CEO · DJANGO WEB STUDIOMeet the team
YOU HAVE VIBE CODED SOMETHING
COOL, NOW IT NEEDS
TO BECOME A
REAL PRODUCT.
We've been building production applications since 2011. That foundation doesn't disappear because AI now writes code. It's the reason we know what AI's code is missing.
We're not vibe coders. We're the team that turns what vibe coding started into something that actually runs.
Django and Python.
Production-grade, since 2011.
We build with proven technologies we know deeply. The tools matter less than the product outcome, but the stack still matters when you need something reliable, scalable, and maintainable. AI makes our team faster than yesterday, that speed belongs to you too.
Backend
Django & Python
- Django
- Python
- Django REST Framework
- Celery (async tasks)
- Pytest (test coverage)
- Custom API development
Frontend
React & Next.js
- React
- Next.js
- TypeScript
- Progressive Web Apps
Data & Infrastructure
PostgreSQL & Docker
- PostgreSQL
- Redis
- Docker & containerisation
- Linux & VPS hosting
AI & Automation
OpenAI & LangChain
- OpenAI API
- Claude Code
- LangChain
- RAG pipelines
- Workflow automation
We have worked in Django and Python since 2011. If a project requires something outside our core, we say so before we start, not after.
DWS is not for everyone.
We work with companies whose revenue runs through their digital product. If your website going down for a day wouldn't cost you anything, we're probably not the right fit.
If it would, let's talk.
Before the first call.
Straight answers to the questions that come up before anyone schedules a call.
How does your pricing model work?
DWS works on a fixed monthly retainer, not hourly billing. You agree a monthly fee and we deliver within that. No surprises, no invoices for overruns. Most Product Partnership engagements start from a minimum 12-month commitment. New Product Build engagements are typically structured over 24 months.
What is a Product Partnership?
A Product Partnership means DWS takes over the technical layer of your existing digital product, architecture, development, QA, maintenance, and product thinking. We act as your technical team, not just a contractor. Minimum 12-month commitment.
How long does a typical engagement last?
Product Partnerships run for a minimum of 12 months. New Product Build engagements are typically structured over 24 months. If you are not ready to commit, the Digital Pilot is a 2-to-4-week fixed-fee engagement with no obligation to continue.
Can you work with an existing codebase?
Yes. We regularly take over existing products. Before starting, we review the codebase and agree a monthly rate. If we find significant technical debt or risks, we will tell you honestly before we start, not after.
What technologies do you build with?
Our core stack is Django and Python on the backend, with React and Next.js on the frontend. For data and infrastructure we use PostgreSQL, Redis, Docker, and Linux hosting. Our AI and automation work uses OpenAI APIs, LangChain, and custom retrieval workflows.
Do you work with companies outside Amsterdam?
Yes. Most of our day-to-day collaboration happens remotely and we work with clients across the Netherlands and beyond. Being based in Amsterdam means we can meet in person when it matters, kick-offs, strategy sessions, and quarterly reviews.
What is the best way to start with DWS?
The easiest starting point is a short call. We will ask about your product, your team, and what is holding you back. If a Digital Pilot makes sense, one problem, two to four weeks, fixed fee. We can scope that quickly.
Three ways in.
Have a running product?
Product Partnership
We take ownership of the technical layer alongside you. One monthly commitment, no surprises.
Have a validated idea?
New Product Build
We spread the build over a fixed monthly commitment. No big upfront invoice.
Start here
Not ready to commit yet?
Digital Pilot
Test your idea in a short, focused pilot. One problem, two to four weeks, fixed fee. No obligation to continue.
Let's talk about your product.
Tell us what you're building, what's holding you back, or just whether DWS is the right fit. We'll reply within one business day.