Before you invest €100k in software, invest €5k to make sure you're building the right thing.
Einder validates your software idea with a clear specification and a working prototype. Independent. No conflict of interest. You see it working before you commit.
Why software projects fail
Most software projects don't fail because of bad code. They fail because no one properly defined what needed to be built. Requirements were vague. Assumptions went unchallenged. The agency scoped the project to maximize their own hours, not to solve your problem efficiently.
By the time you realize something is wrong, you've already spent months and tens of thousands of euros. The fix is not better developers. The fix is better preparation.
And in the age of AI, there's no excuse for guessing. Building a working prototype now costs a fraction of what it used to. You can see your idea working — test it, show it to your team, get real feedback — before committing to the full investment.
Validate before you invest
Step 01 — We Listen
You show us your business. How things work today, what's painful, what you've tried. We watch, ask questions, and map out the real problem — not just the symptoms.
Step 02 — We Spec & Build
We translate your business reality into a structured specification AND a working prototype. Not a slide deck — a real, clickable, testable version of your idea. We challenge assumptions and cut scope ruthlessly — because the best software is embarrassingly simple.
Step 03 — You Decide
You see your idea working. You test it. You show it to your team, your users, your investors. You receive a complete specification alongside the prototype. Then you decide — build it with us, build it with someone else, or don't build it at all. No lock-in.
Starting from
€5,000
Excl. VAT. No hourly billing. No surprises.
What you get
Why work with us
Independent
We don't build unless you want us to. Our scoping has no hidden agenda. We might even tell you not to build at all — because sometimes the right answer is a spreadsheet.
15 years of experience
We've built and modernized platforms handling millions in revenue. We know what works, what breaks, and why.
We speak your language
Dutch, German, English, Polish. No translation layers. Direct communication with the person doing the work.
AI-native
We use AI throughout our process. Not as a gimmick — as a force multiplier. It makes us faster without sacrificing quality or judgment.
Spec-driven
Every engagement starts and ends with a clear specification. You'll never wonder what you're paying for.
Prototype-first
You don't have to imagine what the end product looks like. You see it, touch it, test it — before committing to the full build. AI makes this possible in days, not months.
Need it built too?
The prototype validates the idea. If it works and you want to go to production, we can build it. Fixed price, based on the spec we created and the prototype we tested together. Because the spec is already validated and the prototype already tested, the production build is faster, cheaper, and lower risk than starting from scratch with an agency. Same principles — no surprises, no scope creep, no hourly billing.
Our stack: TypeScript, React, Node.js, Flutter — modern, standard, maintainable. But the scoping service is what matters most. A good spec makes any team faster.
Projects we've delivered
Timesia
Kidesia GmbHSwitzerland
Swiss kindergartens needed a way to track staff hours across multiple locations. We designed and built a complete time management system — web platform and mobile app — used daily across Switzerland.
Huren.nl
Huren.nlNetherlands
The largest Dutch rental comparison platform was drowning in technical debt. We led the complete modernization — incrementally, with zero downtime — while managing a team of 4 developers.
HuisHurenIbiza
HuisHurenIbizaNetherlands
The biggest Dutch holiday rental agency on Ibiza needed a booking engine and client management system. We built it from scratch and supported it for 8 years.
retry.fit
Internal productIn development
AI-powered fitness coaching platform. Turns exercise recordings into structured, multilingual workout plans. Currently in beta with physiotherapists.
Who we are
Einder is run by Piotr Kosytorz — software engineer, requirements specialist, and founder. 15+ years of building and modernizing software for companies across the Netherlands, Switzerland, and Austria.
MSc in Computer Science from the University of Amsterdam, with a focus on requirements engineering and software architecture.
"Einder" is old Dutch for horizon — the edge of what's visible, where the present meets possibility.
Let's talk about your project
Tell us what you're working on. We'll have an honest conversation about whether scoping makes sense for you.