Software that
wins customersdrives revenuelaunches fastergrows with you
Custom software development in Copenhagen. Web apps, mobile apps, and backend systems built by CopenDev for startups and growing businesses ready to launch.
Copenhagen-based studio shipping web apps, mobile apps, backends, integrations, and bespoke tools for founders who need a product live, selling, and ready to scale — without the agency overhead.
Capabilities
Whatever you need,
from idea to production
How we work together
Your project,
completely transparent
No black box. You see every milestone, every decision, and every line of progress through a shared workspace built for founders who want to stay in control without slowing things down.
Every phase, one board
Discovery, design, build, QA, and launch live on one board. Drag the lens to see where your project stands at any moment.
Your client dashboard
Live progress, priorities, and launch readiness you can check anytime.
Project overview
See exactly where your build stands, what shipped, and what is next.
78%
Sprint progress
On track
Launch: this week
Latest update
Checkout flow shipped
Stripe integration live. Onboarding and dashboard up next.
Code built to last
Typed, tested, and peer-reviewed before every release. Your codebase stays clean so future features ship faster, not slower.
const release = {
typed: true,
tested: true,
reviewed: true,
deployable: true,
}
One conversation, zero layers
Direct access to whoever ships it — no middle layers. Decisions in hours, not days.
You · now
Booking flow before Thursday?
Rasmus · 20 min
Stripe in — preview on the way.
System · deploy
Live — payments flowing.
Work
Products in the market
not just in a portfolio
These are live products with real users and real revenue. Built from zero to launch and still growing.
Mercan
As seen on Løvens Hule · DR
Beauty booking app that replaced pen-and-paper scheduling for salons across Denmark. Backed by Anne Stampe on Løvens Hule (DR).
Subscription platform where expert bettors sell picks and members track high-signal insights. Payments, dashboards, and retention loops from day one.
About
One developer,
full ownership
Rasmus Nielsen
Founder & developer
Most product ideas die in the gap between “great concept” and a working product people can pay for. I started CopenDev to close that gap. Computer science background from ITU Copenhagen, full-stack skill set, and one goal: get your product live, usable, and generating revenue.
When you hire CopenDev you hire me directly. No handoffs between designers and developers, no layers of project management. I handle architecture, interface, and infrastructure so every decision stays fast and every detail compounds: sub-second loads, polished UI, and a codebase that welcomes the next feature instead of fighting it.
Contact
Tell me what
you’re building
Drop me the idea, the timeline, and how far along you are. I reply within 24 hours with an honest take on scope, cost, and the fastest path to launch.
rasmus@copendev.dk