GustavPortrait of Gustav Mårtensson
Mårtensson

I design digital products that have to work in real life — national rail, postal infrastructure, and sleep tracking used daily by millions.

Teams usually bring me in when a product has grown complex and decisions start conflicting. If that sounds familiar, email me →

Recognition

  • Apple App Store Editors’ Choice

    Sleep Cycle

  • Swedish Design Award

    SkiStar App

  • Used daily by millions of travellers

    SJ App

  • National rollout of digital postage

    PostNord

Odds & Ends

  • Design Systems & UX Architecture

    Ongoing

  • Complex Mobile Products

    Travel, health, logistics

Products

  • SJ App

    National rail booking

  • Sleep Cycle

    Sleep tracking

  • PostNord App

    Digital postage

  • SkiStar App

    Travel booking

Experience

  • Senior Product Designer @ Sleep Cycle

    2025 – Present

  • Product Designer @ SJ

    2021 – 2025

  • Product Designer @ Taxi Stockholm

    2020 – 2021

  • Product Designer @ PostNord

    2019 – 2023

  • UI Designer @ SkiStar

    2018 – 2019

  • Design Internship @ Söderhavet

    2018

About

I design products people rely on in everyday life — travel, logistics, and health. I work long-term inside teams, shaping structure, flows, and clarity across product and engineering.

My background in photography, architecture, and communication (Berghs School of Communication) informs a calm, reliable approach to complex systems. I’m usually brought in when a product has grown beyond individual screens and needs structure across the whole experience.

Elsewhere

Most of my work lives inside products people use every day. This site only shows a small part of it.

If you’re working on something complex and long-lived — I’d be happy to talk.

gustav@desigm.se