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Product Design (UX/UI) — from €1,800

Design is the cheapest place to change your mind. Do it before you build.

A dev-ready design foundation — flows, components, states — that any engineering team can build from without re-litigating your decisions.

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Dev-ready UX/UI design — flows, components and states an engineering team can build from.

Who this is for

  • You have an idea or a deck, and no design foundation to hand an engineer yet.
  • A freelancer delivered pretty mockups with no components, no states, no handoff structure — and an engineer couldn't build from them.
  • You need to validate before committing budget to a full build.
  • You have engineers, in-house or contracted, and need a design system they can actually implement.

03 — What’s included

  • User flows and information architecture, not just individual screens
  • A component-based design system: buttons, forms, states — default, hover, error, loading, empty
  • High-fidelity UI for every screen in scope, not a handful of "hero" screens
  • An interactive prototype for testing or investor conversations
  • Dev-ready handoff files, structured so an engineer isn't guessing

How it runs

Scope

We map your core flows and agree exactly which screens and states are in scope.

Design

Wireframes first, then a component system, then high-fidelity screens built from that system — never the other way round.

Build

If buildstackstudio also builds the product, this step is Web App Development. If your own team builds it, this is where we hand off.

Launch & Care

A walkthrough call with your engineers, and the files stay yours to extend.

See the full process →

reply within 1 business day

fixed price agreed before work starts

weekly demo, not monthly silence

you own the code and the files

EU-based, GDPR-native, VAT invoices

Packages

BSS-PD-AUDIT

Product Audit

An outside, rigorous read on what you've already built.

€1,800 + VAT

Charged in full at checkout

  • A full UX audit of your existing flows (up to 10 screens)
  • A heuristic review against WCAG AA and platform conventions
  • A prioritised findings report: what's broken, what's risky, what's working
  • A recommended next-step scope, with or without buildstackstudio
  • One review call to walk through the findings together
2 weeks 1 review call

BSS-PD-MVP

Popular

MVP Design

Your idea, turned into a dev-ready design foundation.

€6,500 + VAT

€1,500 deposit at checkout

  • User flows and information architecture for your core product
  • Wireframes through to high-fidelity UI for up to 25 screens/states
  • A component-based design system ready for engineering handoff
  • An interactive prototype for testing or investor demos
  • Dev-ready handoff files (Figma), plus a walkthrough call
4–6 weeks 2 rounds of revisions per milestone

Balance of €5,000 invoiced at 50% on design sign-off, 50% on delivery.

BSS-PD-SYSTEM

Design System

A documented system your team can build on.

€9,800 + VAT

€2,000 deposit at checkout

  • A full component library: primitives, patterns, and every state (default, hover, error, loading, empty)
  • Design tokens (colour, type, spacing) structured for engineering handoff
  • Documentation: usage rules, do/don't examples, accessibility notes
  • The system applied to two real product flows, as proof it holds up in use
  • Handoff files plus a working session with your engineering team
6–8 weeks 2 rounds of revisions per milestone

Balance of €7,800 invoiced at 50% on system sign-off, 50% on delivery.

Proof

Nimbus is a full token-based component system, built and documented the same way any Design System package on this page would be.

Nimbus — Design System — studio concept project, duotone.

Studio concept project

Nimbus — Design System

A self-initiated concept for a token-based component library and design system.

FAQ

No — that's exactly what the Product Audit tier exists to prove before you commit to a larger spend. Every package states named artefacts (flows, components, states, handoff files), not a vague line item called 'UI design.'

Both, if you want — Web App Development is the natural next step, built by the same studio against the same design system. Or take the handoff files to your own team; they're yours either way.

Yes. The Scope step is where a rough idea becomes a written flow and screen list. You don't need a finished spec to start; you need one after Scope.

Figma. Handoff files are Figma-native, with tokens and components structured for direct engineering use.

Stated exactly per package — see the package's includes list above. If your product needs more, we scope the difference before any extra work starts.

Ready to give your idea a real foundation?

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