You run the business.
We build the product.
We're the engineering team for founders without one. Whether you've outgrown no-code or never hired developers, we take your product from idea to live: architecture, build, and launch end to end. Fixed price.
Our work
Three end-to-end builds. The first is Elypsum's. The other two are from before the studio: included as proof of depth on the foundations your product will need from day one.
Evently - Mobile Event Platform
Mobile app · Slovak startup · 1-person dev team
The problem
The nightlife and events space had no modern platform for both attendees and venues - covering discovery, ticketing, table reservations, and capacity management in one place.
What we did
Full product ownership from zero: market research, product strategy, UI/UX design, and the complete mobile application for both attendees and venue operators. Built the backend with real-time notifications, Stripe payments, role-based auth, and a cryptographic QR system for ticket validation.
The result
Zero to live in app stores - with payments, real-time features, and a full venue management system.
Data Intelligence Platform
SaaS · Czech startup · 2-person dev team
The problem
A Czech SaaS startup's core data pipeline was unreliable - slow, expensive, and missing data from key sources. Their product depended on this data, and the system was becoming a liability.
What we did
Rebuilt the entire data pipeline from scratch - scraping, processing, and storage - across 10+ sources. Then designed and built an AI-powered ICP definition tool that helps users find companies matching their ideal customer profile.
The result
Cut processing time in half. 95%+ accuracy across millions of records. The ICP tool became the product's core revenue-driving feature.
Niche Marketplace
E-commerce · US scaleup · 12-person dev team
The problem
A US-based marketplace was growing fast but its JavaScript codebase had grown into a bottleneck. They needed to scale core product features, improve conversion, and modernize - without stopping feature delivery.
What we did
Shipped core e-commerce features, rebuilt the search system for better conversion, and stood up the analytics infrastructure from scratch. Designed the full performance testing pipeline. Contributed to a large-scale JavaScript to TypeScript migration, including a custom parser to accelerate the process.
The result
Modernized stack, no feature-delivery freeze during the migration.
Have something to build? Book a 30-minute call
What we believe
Strong opinions, transparently held.
Discovery should be paid.
Scoping done right takes weeks, not a sales call. We charge for it because it's real work with a real deliverable. The plan is yours, either way.
Fixed price is a discipline.
The price you sign is the price you pay. If we underestimate the work, that's our problem, not yours. It only moves if you ask us for something new.
AI features should pay rent.
AI features have to pay rent: hours saved, revenue earned, decisions made faster. If we can't measure it, we don't build it. AI is a tool, not a headline.
Same team scopes and ships.
The person who pitched you is the person writing your code. The studio is small by design. There's no handoff between sales and delivery.
No lock-in is a feature.
Your spec is yours after Discovery. Your code is yours after launch. We win the next project because you want us back, not because leaving is expensive.
Working code, not slides.
Every week, you get a working build to click through. Problems surface while we can still fix them. No status reports. No surprises at the end.
How we work
A predictable process, end to end - no surprises, no lock-in.
Product Discovery
We spend 2–4 weeks understanding your business, scoping the product, and planning how it'll be built. You get a detailed plan, a fixed price, and a timeline - before any code is written. If the plan doesn't convince you, it's yours to take anywhere.
Product Development
Development runs in weekly cycles against the fixed scope and price set in Product Discovery. Every week you see working software, not slide decks, so you can steer the product as it takes shape - not discover problems at the end.
Ship & Support
We take the product live and stay on through the launch window. After that, you decide what's next: continued development, ongoing support, or a full handoff to your team with documentation and everything they need to take over. No lock-in, ever.
What we do
Three ways we help. One process. Always fixed-price.
Product Discovery
Two to four weeks of paid scoping. We map your business, the product you need, and the plan to build it. You leave Discovery with a fixed-price quote, a timeline, and a working architecture. Even if you don't continue with us, the plan is yours.
Product Development
You have the idea, the funding, the customers, but no engineering team. We build what you need: a website, a web app, a mobile app, or all three. End to end and ready to launch. AI features built in where they earn their place. You own everything: the code, the design, the product. No strings attached.
Product Rescue & Modernization
Your product works but it's getting in your way: slow to load, breaking under load, taking weeks to add anything new. Often it was built on no-code, by an outside team, or by a single contractor who's moved on. We dig in and fix the foundation. The same product, running faster, holding up under traffic, and growing with you again.
Pricing
Fixed-price, scoped projects. You see the price before you commit. You see working software every week after that.
Product Discovery
€10,000 – €20,000
2–4 weeks
Paid scoping that ends in a detailed plan, a fixed price, and a timeline for the full build. Best when you want to know exactly what you're getting before committing to development. If the plan doesn't convince you, it's yours to take anywhere.
Product Development
€20,000 – €100,000
4–8 weeks
The complete project, end to end. Best for building a new product from scratch, or replacing a no-code tool that's hit its limits. Includes Product Discovery, weekly delivery cycles, working software, and a live launch with ongoing support. AI features built in where they earn their place.
Product Rescue & Modernization
€10,000+
Scope-dependent
Fixing the product you already have. Best when it works but is slowing you down - slow to load, breaking under load, or taking weeks to add anything new. Starts with a technical review, then a fixed-price plan. Same product, running faster and built to grow.
About
A product engineering studio based in Slovakia. We work with founders across Europe and the US who need to ship real software but don't have an engineering team, and don't want to spend six months hiring one.
Why a studio, not an agency
Traditional agencies give you account managers, rotating developers, and communication layers. Freelancers give you one person with no backup plan. A studio gives you the best of both: senior-level expertise, direct communication, and a team that owns the outcome.
When you work with Elypsum, you work with people who build - not people who manage people who build.
Kristián Müller
~ Founder ~
I've spent the last several years building products for startups and scaleups across Europe and the US - data platforms, marketplaces, mobile apps, AI-powered features - taking them from early concepts through production at scale.
I started Elypsum because I kept seeing the same problem: companies that needed senior engineering but couldn't justify a full hire, and couldn't get what they needed from agencies that rotate junior developers through projects. So I built a studio where you work directly with the people writing your code - and where every project gets the architecture decisions it deserves.
Questions you might have
What founders ask before they hire us.
Question we didn't answer? Just ask
Let's talk about your project
Tell us what you're building. Within 24 hours we'll reply to set up a 30-minute call where we:
- - Understand the business and the product you need
- - Decide together whether we're a good fit
- - Outline concrete next steps and rough pricing
If we're not the right fit, we'll say so on the call.
No pitch, no follow-up.