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Replace the legacy system — without losing a single feature.

We modernise ageing platforms onto a fast, typed, server-rendered architecture. Incrementally, tested, with no downtime and full feature parity.

The challenge

Legacy systems make every change slow and risky, and performance holds the business back. At the same time, a rewrite that drops features users depend on isn't an option — especially when the platform is used every day, across the country.

How we do it

01

Map it in full first

We map the existing system in detail and guarantee feature parity before we move a single user.

02

Incremental, not big-bang

We migrate step by step with parity testing, keeping risk low at every release and operations running throughout.

03

A modern, lasting foundation

A typed, server-rendered Next.js stack built for speed and maintainability for years — not another temporary fix.

04

Fast where it counts

Rendering and caching tuned so pages are fast on first byte and every interaction after.

4D → Next.js
Fully modernised
Zero
Features lost in migration
Faster
Across the board

Stuck on a legacy system?

Tell us what you run today, and we'll map a safe path to a modern platform.

Let's build your next platform.

Tell us what you're building. We'll help you define the architecture, the experience and the path to launch.

Studio
Oslo, Norway