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UX/UI designer in Prague

Hi! I'm Šimon. I design experiences that make sense.

I'm a deep thinker who looks for solutions that respect the vision of a project and make sense for both the customer and the business.

Black and white portrait of Šimon Leška smiling in a black T-shirt
energy calculator completions after the innogy.cz redesign
+350%
active users of the innosvět energy app
78k
visitors explored art through Signal AR
5,000+
WebTop100 and Effie awards for my projects
5

Featured clients I worked with

  • Amazon
  • innogy
  • Signal Festival
  • Siemens
  • Nasdaq
  • Nescafé
  • Česká spořitelna
  • Komerční banka
  • Korado
  • Mendel University in Brno

Selected work

Case studies with real results.

Websites, apps and augmented reality for brands like innogy, VZP and Signal Festival, from first research to launch.

  • Augmented reality artwork Visitors by Longyi floating above the park at Karlínské náměstí in PragueAugmented reality app

    01 / Signal Festival

    Signal AR

    An augmented reality module that brought Signal Festival artworks to the streets of Prague, unlocked by scanning markers on site.

  • Result

    +350%

    energy calculator completions within three months of launch

    Website and design system

    02 / innogy

    Redesign of innogy.cz

    A complete redesign and rebrand of innogy.cz, with a modular design system and an energy calculator built to win new customers.

  • Printscreen.cz mobile homepage offering canvas prints, posters and photos with an upload button for each
    E-commerce, mobile first

    03 / Printscreen.cz

    Printscreen.cz

    A mobile-first print shop where anyone can upload photos, adjust them in a simple editor and order canvas prints, posters or photos.

  • innosvět app screen comparing expected and measured gas costs on a chart, with a predicted overpayment of 236 CZK
    iOS and Android app

    04 / innogy

    innosvět app

    An iOS and Android app showing real-time energy consumption, billing information and smart insights, used by around 78,000 people.

  • VZP walking campaign landing page with prizes to win and a three step guide to joining the competition
    Campaign web app

    05 / VZP

    Let's go for a walk!

    A GPS check-in campaign that got people walking to tourist spots all over the Czech Republic for a chance to win prizes.

  • Wine not? welcome screen of the Wunderman wine tasting web app
    Mobile web app

    06 / Wunderman Thompson

    Wine tasting web app

    A mobile-first web app for a company wine tasting: read about every wine, see where it comes from, rate it and order your favourites.

What I believe in

Principles I design by.

Good UX sits between what people need and what the business needs. These are the beliefs that keep me honest about both.

  1. 01

    A happy user means good business.

  2. 02

    The best design is contextual.

  3. 03

    I lean on data, but I also trust my experience.

  4. 04

    The best improvements come from proper feedback.

  5. 05

    If I want to know for sure, I do user testing.

  6. 06

    Design systems are my friends.

  7. 07

    So is prototyping.

  8. 08

    I also do research and UX heuristic analysis.

  9. 09

    Plus data analysis with Google Analytics, Hotjar and more.

Awards won

Recognised by the industry.

Five WebTop100 and Effie awards for websites, e-commerce and campaigns I worked on.

  • 1st

    Online tool of the year

    Printscreen.cz

    WebTop100 2019

  • 3rd

    E-commerce project of the year

    Printscreen.cz

    WebTop100 2021

  • 1st

    Best company website

    Leros.cz

    WebTop100

  • 2nd

    Microsite of the year

    innosvět

    WebTop100

  • 3rd

    Other services

    innosvět

    Effie Awards 2018

Portrait of Šimon Leška laughing, sitting against a light wall

About me

I am a deep thinker. UX, videogames, art and music are the things I live for. Also ramen.

I enjoy thinking outside the box and coming up with solutions that understand the vision of the project, while providing an experience that makes sense for both the customer and the business.

More about me
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