Understanding people
Shaping products.

Over ten years designing digital experiences, from early-stage startups to global brands. I turn complex problems into clear, usable products.

Selected Work

Design Stories

Brands I've worked with

Kat at work
Kat personally

Get to know me

Hi πŸ‘‹ I'm Kathryne Mueller.

Over the past 10 years I've led end-to-end product design across a variety of industries, like health, energy, retail, automotive, and telecoms. I've delivered high-impact work for leading global brands and early-stage startups alike, and adapted quickly to new domains and challenges.

With a degree in Graphic & Communication Design from Leeds University, I spent time earlier in my career in digital content, media, and marketing, before feeling a strong pull back to creating. What I love about UX is fundamentally what it's always been about - problem solving. Understanding what people actually need, and designing something that genuinely works for them.

I'm excited to bring that curiosity somewhere new, so I am currently open to permanent and freelance opportunities.

Free time is rare, but when I get it I try to make it count! I'm usually outdoors or staying active. I've recently got into kickboxing, which I love πŸ₯Š

I like trying to learn something new, whether that's a craft or a recipe. I've been baking a lot lately and I'm pretty proud of my Bavarian pretzel πŸ₯¨

I also speak a pretty good level of German now, after about a decade of learning, which comes in handy when I'm in the Alps, one of my favourite places in the world πŸ”οΈ

Family is a big part of my life, and we spend time exploring the River Thames beauty spots on weekends near our hometown in Berkshire. 🌿

Skills

I'm a strategic, big-picture thinker. I'm at my best when I'm connecting the dots - bringing teams together, questioning assumptions, and designing experiences that actually make sense end-to-end. If that's what you need, then let's talk!

Experience

Work History

Download CV
Health-Tech Start Up Oct 2025 – Jan 2026

Fractional Designer

Designing the core product and user experience for a pre-seed healthcare startup on a fractional basis, providing part-time, hands-on support in the early stages.

Prototyping Mobile Design Data Visualisation Concept & Strategy Greenfield & Startup
Toyota Connected Europe Apr 2024 – Oct 2024

Senior Product Designer – Contract

  • Lead UX for vehicleβ†’home (energy management) features in the Toyota Europe app.
  • Redesigned the full user journey and UI for Smart Charging; a complex feature integrating home charging and energy management, resulting in a more intuitive experience and stronger user engagement through testing and iteration.
  • Led cross-functional workshops that bridged gaps between product, dev, and design, strengthening collaboration and building lasting trust among stakeholders.
  • Ran user interviews and usability testing, delivering insight-led playback sessions to the teams.
  • Mapped complete customer journeys with Service Design leads, capturing every touchpoint from frontend to backend, and developing a holistic view of Smart Charging and energy management within the full user and system landscape.
UI Design Mobile Design Prototyping Design Systems Journey Mapping Workshops User Research
Shell Jan 2022 – Nov 2023

Senior Product Designer – Contract

  • Together with Shell's innovation team in Germany, we created and pioneered a successful B2C proof-of-concept home energy management app for Shell Energy, intended to launch nationally. I took over as lead designer by project end, leading UX research, UI design, and feature strategy, with a focus on engagement and gamification.
  • Led a 5-week mini design sprint for sonnen GmbH to deliver a proof of concept and testing approach for their first-ever dynamic pricing offering. This included a new landing page concept, integration proposals for the sonnen app, and a comprehensive research and design pack presented to senior stakeholders, providing a clear head start for the upcoming project.
Mobile Design Design Systems Data Visualisation Workshops User Testing Greenfield
Clubhouse Studios Jul – Aug 2020 Jun – Oct 2021

Freelance UX Consultant

Collaborated closely with the UX Director on UX content strategy for major adidas campaigns including Stella McCartney and a new inclusive sports bra line, while working alongside Clubhouse's creative team to assemble campaign asset packs to present back to the adidas teams.

Concept & Strategy Digital Content Marketing UX Writing
Browns Fashion Sep 2019 – Mar 2020

Freelance UX Consultant

Delivered UX and UI designs for Browns' website and mobile app, enhancing user journeys for luxury retail customers based on real feedback and analytics insights.

Prototyping User Testing Optimisation
The White Company Aug 2018 – Mar 2019

Freelance UX Designer

Lead UX for the multi-channel team delivering best-in-class user experiences for the website, notably a redesign of all legacy content into a new mobile-first responsive design following accessibility standards. This included all the self-service pages, help content, and a new store locator.

Prototyping Design Systems Wireframes Prototypes Optimisation AB Testing Web Analytics User Testing
EE Mar 2017 – Jun 2018

UX Designer

  • Lead UX designer for new products and propositions, where I designed a complex digital flow for the launch of the first connected wearable device.
  • Introduced a cross-sell feature that drove a 250% increase in watch orders from customers purchasing an iPhone.
Data Visualisation Workshops User Research User Testing
EE Aug 2015 – Jan 2016 Jan 2016 – Mar 2017

Digital Category Executive Digital Customer Experience Manager

  • Promoted from executive to manager (individual contributor) within 6 months of starting the role.
  • Notable work includes the content execution for the launch of iPhone 7 on EE's website, which at the time became the most successful digital iPhone launch, beating traffic targets by 21%.
  • Employee recognition β€” Received two Managers Choice Awards and a People's Choice Award for my work in this role.
Stakeholder Management Team Management Concept & Strategy Web Analytics Content Management UX Writing & SEO CMS
Samsung Electronics UK Aug 2013 – Jun 2014 Jun 2014 – Jul 2015

Media Graduate Digital & Media Campaign Executive

Managed relationships with large content partners, media and creative agencies to build unique digital content, driving brand engagement and awareness for new product launches and campaigns on the global website.

Concept & Strategy Budgets Marketing Digital Content Media Planning

Looking forward to chat.

Drop me a message and I'll be in touch.

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