Dev-Ready UX/UI for a Streaming App

Design System, Component Library and Implementation-Ready Handoff for External Development Teams

Timeline
October 2021
Scope
UXUI

Designing the WELT TV mobile app meant structuring a complex streaming product rather than simply designing screens. The app combines documentaries, series, news clips and live broadcasts within a single platform, while also integrating editorial logic, brand requirements and monetization features such as Plus access and paywall elements.

From the beginning, the focus of the project was to create a system that external development teams could implement without ambiguity. Instead of treating each screen as a standalone layout, the product was designed as a structured UX architecture that defines how content, components and navigation behave across devices.

Project image

The foundation of the project was a documented design system that structured the visual language and interaction patterns of the app. Rather than designing isolated layouts, UI elements were organized into reusable components and states that could scale across the entire product.

Blartz

#171B2D

23,27,45

Orange

#F18825

241,136,37

  • 01Brand-aligned color, typography and spacing systems
  • 02Navigation patterns adapted to both iOS and Android conventions
  • 03Defined component states such as loading, empty and error conditions
  • 04Responsive rules for phone and tablet layouts, portrait and landscape
  • 05Consistent media teaser and thumbnail hierarchies for editorial content
Gallery image 1
Gallery image 2
Screens alone don’t explain how a product behaves.

Beyond the visual system, the project included a detailed screen-by-screen specification describing how the interface behaves in real scenarios. These notes document logic that cannot be derived from static UI layouts.

  • 01Home screen with editorial highlights and program navigation
  • 02Video detail pages for shows, series and news segments
  • 03Streaming player with live and on-demand video
  • 04Live broadcast section including EPG integration
  • 05Authentication, account and profile flows
  • 06Settings, notifications and platform-specific variations
iPhone mockup 1
iPhone mockup 2

Together with a component library containing more than one hundred component states and a device matrix covering phones and tablets across both platforms, the product became a coherent UI system rather than a collection of layouts.

Stakeholders from marketing, editorial, brand and management were involved throughout the process. User flows were mapped and reviewed iteratively to ensure that not only the visuals but also the structure and navigation of the product worked reliably.

The outcome: a dev-ready design handoff.

The final deliverable was a structured package of components, rules and screen specifications that allowed the external development team to start implementation quickly and with minimal ambiguity.

Instead of handing over design files, the project translated the product into a system developers could build with confidence.

Project image

Benedikt Schnupp

Senior Designer & Developer based in Berlin, crafting digital experiences.

Mailing List

© 2026 Benedikt Schnupp. All rights reserved.
Berlin, Germany