UI Modernization

A modern interface on your existing system

We replace outdated frontends without touching the business logic underneath. Fast change, big impact, low risk — the system keeps working, it just stops looking and feeling like 2009.

Show us your UI See how it works
15+
Years of experience
EU & US
Markets served
Senior only
No juniors on projects
AI+
Accelerated delivery
The problem

The system works. The interface doesn't.

Solid business logic trapped behind an interface nobody wants to use is one of the most common — and most fixable — problems in business software.

It works, but looks ancient

Users compare your system to the consumer apps they use daily — and it loses. Sales demos start with an apology for the screens.

New people can't use it

Convoluted flows, no responsive layout, keyboard tricks only veterans know. Training takes weeks and mistakes are constant.

A backend rewrite is off the table

The logic is solid and battle-tested over years. Rebuilding it just to fix the UI would be waste — you need a new front, not a new system.
What we do

New front, proven back

The full range of frontend replacement — from a single admin panel to a complete e-commerce storefront.

UI audit and redesign

We map current flows, find the friction, and design a modern interface — as a design system your team can extend, not a set of one-off screens. Interface design is part of the engagement — you don’t order it separately.

New frontend on the existing backend

We build a modern frontend (Angular, React, Vue) against your current API or database. The logic stays exactly as it is — the experience changes completely.

E-commerce storefront modernization

A legacy commerce frontend — an aging theme, a jQuery-era storefront, monolithic platform templates — replaced with a modern, fast front connected to your existing shop platform. Better Core Web Vitals, better conversion, same proven backend and integrations.

Legacy admin panels

The screens your team lives in for 8 hours a day deserve better than an afterthought. We rebuild internal panels for speed of work: keyboard flows, bulk actions, sane defaults.

Incremental rollout

Screen by screen or module by module — users switch gradually, and the old UI stays available as a fallback until the new one has earned their trust.
How it works

From audit to rollout

A frontend swap is only low-risk if the process is designed for it.

01

UX and UI audit

We watch how the system is actually used, map the flows, and find what costs users the most time.
02

Design system

Components, patterns and screens designed as a coherent system — approved before a line of code.
03

Build on the existing API

The new frontend talks to your current backend. No logic rewrite, no data migration, no regression risk in the core.
04

Gradual rollout

Module by module, with the old UI as a fallback. Users migrate when the new interface is demonstrably better.
Outcomes

What you get

  • An interface users stop complaining about
  • Faster onboarding of new employees
  • Higher conversion on customer-facing screens
  • Zero changes to proven business logic
“Same system, new front. Our demo win rate changed within a month.”
Jonas Meyer Head of Sales, logistics SaaS
FAQ

Common questions

Does the backend really stay untouched?

Yes. The new frontend talks to your existing API or database. Where the API is missing pieces, we add thin endpoints without touching the core logic.

Our users hate change. How do you handle that?

Gradual rollout, module by module, with the old UI available as a fallback. Users switch when the new interface is visibly faster for their work, not because a memo said so.

How long before we see something?

The first redesigned module typically ships within weeks. UI modernization is the fastest-payback project we do.

Is design included, or just development?

Included. Audit, design system, build and rollout are one engagement, so nothing is lost between a design agency and a dev shop.

Interface stuck in 2009?

Send us a link or a screenshot. We'll tell you what a modern frontend on your existing system would take.

Show us your UI
or write to us directly: hello@udb.pl