Redesigns and design systems: Rohlik, Avast, Norton, Vilgain

I've led and contributed to redesigns at Rohlik.cz, Avast, Gen Digital (Norton) and Vilgain, focused on modern UI standards, accessibility compliance and scalable design systems.

How I approach a redesign

1. UI audit. An internal audit maps every weakness in the current UI: inconsistencies, outdated patterns, accessibility gaps.

2. Pattern extraction. Recurring patterns that can be improved are standardised and added to the design system.

3. Redesign. Screens are rebuilt to modern UI standards and WCAG 2.1 AA accessibility.

4. Validation. Key features go through usability testing to confirm the experience actually improved.

Design system experience

• Rohlik.cz — contributed to and managed the design system for web and mobile (2023–2026)

• Vilgain — built the design system for the mobile app and web (2026)

• Avast and Norton — contributor to both design systems (2019–2023)

Rohlik.cz checkout redesign (web, iOS, Android)

• Role: Product Designer

• Period: September 2023–March 2026

• Scope: checkout redesign across all platforms; design system contribution and management for web and mobile

Problem. Checkout had grown separately on each platform, with missing pieces and discrepancies between Android, iOS and web.

What I did

• Ran an internal audit mapping what was missing and where the platforms differed

• Aligned Android, iOS and web into one compact checkout experience

• Designed two mobile concepts: a one-page checkout that expands the active section, and bottom sheets for the active section

• Ran usability tests with active users, who went through both concepts and picked their preference

• Shipped the bottom sheet version across platforms

Key finding. Bottom sheets were much cleaner on mobile: users focus on the one piece of information they need to enter.

Other work at Rohlik

• Redesign: filters on the category page

• New features: live notifications, Maia (AI shopping assistant, chat and voice), referral program

Avast Mobile Security (Android)

• Role: Product Designer, led design of the Android Mobile Security app

• Period: August 2019–March 2022

• Scope: migration to a new design system, redesign of legacy features

Problem. The app was built on an old component set. The UI looked dated, screens were inconsistent, and several features hadn't been touched in years.

What I did

• Audited the app and mapped UI weaknesses and inconsistent patterns

• Migrated the app to the new design system, contributing new components back to it

• Redesigned flows of legacy features instead of only reskinning them

• Brought the UI up to modern standards and WCAG 2.1 AA

Norton Security History (Windows)

• Role: Product Designer, Windows antivirus at Gen Digital

• Period: October 2022–October 2023

• Scope: complete redesign of the Security History feature

Problem. Security History shows users what the antivirus did for them: threats blocked, scans run, issues fixed. The old version had a very dated UI and copy that was far too technical for most users.

What I did

• Audited the existing feature and mapped its weaknesses

• Redesigned it from scratch around the user's question: am I protected, and what happened?

• Rewrote the copy in plain language and linked each detected computer problem to the setting that fixes it

• Ran usability testing to verify the redesign improved the experience

Outcome. Users understood what happened and resolved problems faster and more precisely.

Vilgain mobile app (from scratch)

• Role: Senior Product Designer

• Period: May–October 2026

• Scope: mobile app built from scratch, design system for app and web

Problem. No existing app and no shared patterns between platforms.

What I did

• Designed the whole app end to end, including storefront (homepage), product detail, search, category pages and an Apple Wallet loyalty card for collecting orders at store pickup and using credits

• Built the design system shared by the app and web

• Applied modern UI standards and WCAG 2.1 AA from day one