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Turn your UI design into a competitive asset.

Interface design that reflects your brand, guides your users, and gives your team a system they can ship with confidence.

Tell us about your project

Trusted by enterprises across Europe and the US:

Siemens
Siemens Healthineers
PwC
Geberit
Toyota
Rainbow
Chooose
Omnipack
Lexolve

Do any of these

sound familiar?

Interface inconsistency confuses your users.
Visual debt slows your engineers down.
Users abandon before completing key actions.
Outdated design loses first impressions fast.
Brand identity breaks across screens.
What is UI Design?

What is UI Design?

UI Design at Startup House means delivering a complete visual language for your product. We define your design tokens, build a component library your engineers work with directly, and document every interaction pattern and edge case.

The result is a product that looks intentional, performs consistently, and scales without visual debt accumulating sprint after sprint.

We work from your brand guidelines or help you establish them. We align every visual decision with how your users actually behave. A prettier product is not the goal. A product that earns trust, reduces friction, and converts better is.

Let's talk

Our process & deliverables

01

UI Audit + Benchmarking

We start every project grounded in real data. We audit your existing product, research your users, and map the competitive landscape, so every design decision that follows has a clear rationale.

UX AUDIT OF THE CURRENT SOLUTIONCOMPETITIVE BENCHMARKING AND TREND ANALYSIS

02

Design

We design high-fidelity interfaces that reflect your product's final appearance — visual style, interactions, and micro-animations. Everything is built on a reusable component library, tested with real users, and handed off development-ready.

HI-FIDELITY SCREEN DESIGNSCLICKABLE PROTOTYPECOMPREHENSIVE UI KIT (COMPONENT LIBRARY)POST-PROJECT DEVELOPMENT SUPPORT

01

UI Audit + Benchmarking

We start every project grounded in real data. We audit your existing product, research your users, and map the competitive landscape, so every design decision that follows has a clear rationale.

UX AUDIT OF THE CURRENT SOLUTIONCOMPETITIVE BENCHMARKING AND TREND ANALYSIS

02

Design

We design high-fidelity interfaces that reflect your product's final appearance — visual style, interactions, and micro-animations. Everything is built on a reusable component library, tested with real users, and handed off development-ready.

HI-FIDELITY SCREEN DESIGNSCLICKABLE PROTOTYPECOMPREHENSIVE UI KIT (COMPONENT LIBRARY)POST-PROJECT DEVELOPMENT SUPPORT

How we use AI in design

Faster iteration. More paths tested. Every decision still made by a human.

Low-fi concepts in minutes.

We generate and compare multiple design directions in Figma before committing to one.

More variations.

AI lets us test more user paths and component options within the same timeline.

Interactive prototypes, faster.

We build clickable prototypes quicker, so user testing starts earlier in the process.

Parallel iteration.

We run multiple prompt-driven design explorations simultaneously and select the strongest direction.

Earlier UX validation.

AI processes user research, session recordings, and feedback faster, so design decisions are grounded in evidence within days, not weeks.

Human oversight at every step.

Every AI-assisted output is reviewed and approved by a senior designer. The tools move faster. The decisions stay ours.

Low-fi concepts in minutes.

We generate and compare multiple design directions in Figma before committing to one.

More variations.

AI lets us test more user paths and component options within the same timeline.

Interactive prototypes, faster.

We build clickable prototypes quicker, so user testing starts earlier in the process.

Parallel iteration.

We run multiple prompt-driven design explorations simultaneously and select the strongest direction.

Earlier UX validation.

AI processes user research, session recordings, and feedback faster, so design decisions are grounded in evidence within days, not weeks.

Human oversight at every step.

Every AI-assisted output is reviewed and approved by a senior designer. The tools move faster. The decisions stay ours.

What you gain beyond better-looking screens.

Faster engineering delivery.

A component library reduces the time developers spend recreating UI elements. Your team ships new features without starting from scratch every sprint.

Higher conversion and retention.

Visually consistent, intuitive interfaces reduce cognitive load. Users complete key actions more often and return more frequently.

Brand integrity at scale.

Your product reflects the same visual identity across web, mobile, and every touchpoint. Users recognize your brand without reading a single word.

Reduced design debt.

A documented design system prevents visual inconsistency from accumulating over time. Onboarding new designers or developers takes days, not weeks.

Accessibility Built In

WCAG compliance is integrated into components from the start, not retrofitted later. Your product meets regulatory requirements (including the European Accessibility Act) without a separate accessibility audit cycle.

Outpace competitors visually.

Enterprise buyers and end users compare your product to the best interfaces they use every day. A polished, consistent UI signals reliability and positions you ahead of alternatives that look unfinished.

From visual chaos to a scalable design system.

View all projects

“

The interfaces that perform best are not the most beautiful ones. They are the most intentional ones. Every spacing decision, every component, every color choice has a reason. That is how we approach UI design.

“

Bartosz Storożak

Bartosz Storożak

Design Team Lead at Startup House

Frequently asked questions

UX design defines how a product works. That includes structure, user flows, and logic. UI design defines how it looks: colors, typography, components, and visual hierarchy. We handle both and make sure they work together from the start.

It depends on your product scale and development workflow. For growing products with active development cycles, a design system significantly reduces long-term costs and rework. We assess your situation before recommending scope.

Timelines depend on product complexity and scope. A focused engagement covering a core product area typically takes 4 to 8 weeks. Full design system projects for larger products run 8 to 16 weeks.

Yes. We build UI systems from your existing brand assets. If your guidelines are incomplete or outdated, we flag the gaps and recommend updates before designing any screens.

We deliver annotated Figma files with precise spacing, typography, color tokens, and interaction specs. We include a component library your engineers implement directly. We support handoff reviews to ensure alignment before development starts.

Yes. We design for responsive web and native mobile from the start. Components are defined with breakpoints and platform-specific adaptations fully documented.

We align on metrics before the project starts. Typically that means conversion rates, task completion rates, and session retention. We design to measurable outcomes, not aesthetic preferences.

Ready to build an interface your users trust?

Start with a visual audit of your product. We identify what is costing you users and show you exactly what to fix.

Book a 30-min call

Work with a team trusted by top-tier companies.

Siemens logo
PwC logo
Toyota logo