Designer
Developer
KasperAndreas

From idea to shipped product, fast and documented.

We are a designer + developer duo building modern web and app experiences grounded in real user behavior and robust code.

Based in Copenhagen, Denmark

Teams we have collaborated with

Northlane
FjordPay
Atlas Health
Cove Capital
Mosaic Learning
Arbor Labs

What we build

End-to-end product delivery with design precision and production-grade engineering.

Web Experiences

Marketing sites and product platforms that load fast and convert.

    Next.js
    SEO-first
    Conversion-focused

Mobile Apps

Native-feeling mobile products designed around real user flows.

    iOS + Android
    Smooth UX
    Analytics-ready

Product Design

From rough concept to testable prototype and polished interface.

    UX research
    Design systems
    Rapid iteration

Full-stack Systems

Backends, dashboards, payments, communities, and data models.

    APIs
    Automations
    Secure architecture

How we work

A transparent process where you see progress every week and always know what is next.

  1. Discover mockup
    01

    Discover

    Align goals, user context, technical constraints, and success metrics in one focused kickoff.

  2. Design + Scope mockup
    02

    Design + Scope

    Turn strategy into clear user flows, interface direction, and a realistic delivery scope.

  3. Build with visibility mockup
    03

    Build with visibility

    Ship in weekly iterations with demos, changelogs, and documentation your team can follow.

  4. Launch + Iterate mockup
    04

    Launch + Iterate

    Launch confidently with QA and analytics, then improve based on real user behavior.

Design quality you can feel

Slide to compare a cluttered interface with a cleaner product experience focused on clarity and conversion.

Before: noisy and unclearAfter: focused and usable

Code that stays clean

Readable, typed, and documented where it matters so your team can move faster after launch.

Secure your time slot
type BookingRequest = {
  company: string;
  goal: "launch" | "scale";
  budgetRange: "30-60k" | "60k+";
};

export async function createPlan(input: BookingRequest) {
  const insights = await researchService.getUserSignals(input.company);

  return roadmapBuilder
    .fromInsights(insights)
    .withMilestones(["Design", "Build", "Launch"])
    .withWeeklyDocumentation(true)
    .build();
}

Bad vs good delivery

The difference between expensive rework and confident release days.

Your average project

  • Design and code drift apart
  • Hardcoded hacks block future features
  • No documentation for decisions
  • Slow pages and fragile integrations
app.get("/user/:id",(r,s)=>(
  r&&r.params&&r.params.id
    ? db.users.find(r.params.id)
        .then(u=>u
          ? (u.email
              ? s.status(500).send("bad user"))
          : s.status(404).send("no user"))
    : s.status(400).send("no id")
));

Stubio approach

  • Design and engineering move as one team
  • Clean architecture that scales with the roadmap
  • Transparent documentation and weekly checkpoints
  • Fast, observable, maintainable releases
type User = { id: string; email: string };

app.get("/user/:id", async (req, res) => {
  const user = await db.users.find<User>(req.params.id);

  if (!user) return res.sendStatus(404);

  res.json({ email: user.email });
});
Book a call

Book a focused product session today

Tell us where you are now, what you need to ship, and we will map the fastest path forward.

Recent project examples

A few outcomes from product and platform work across industries.

Dashboard onboarding flow preview
Web app

B2B SaaS onboarding

+39% activation in 8 weeks

Mobile marketplace card layout
Mobile

Marketplace mobile relaunch

2.1x weekly retention uplift

Payment dashboard and API status
Backend

Payment + subscription backend

Checkout time reduced by 46%

Community platform interface
Full-stack

Community platform rebuild

From 4 to 1 operational systems

Performance monitoring graph
Optimization

E-commerce performance sprint

Core Web Vitals in green on mobile

Analytics workspace screens
Data

Investor reporting workspace

Reporting cycle cut from 5 days to 1 day

Tech stack

We pick tools for speed, reliability, and long-term maintainability.

Next.js
React
TypeScript
Node.js
PostgreSQL
Prisma
Tailwind CSS
shadcn/ui
Framer Motion
Vercel
Stripe
Supabase

FAQ