Just click me if I’m in the way
Hi! I’m Thomas, a UX & Product Designer that designs for Simplexity: I transform complex systems into easy to use products. Good UX is invisible, but never accidental.
I transform hunches to actionable insights. With over 300 user interviews conducted I love testing risky assumptions, or better said, I love hanging out with unpredictable, irrational, complicated humans that are gaining value from the products and services that I design.
Throughout my career I’ve collaborated with a diverse set of brands, including Philips, Signify, ASML, CM.com, and Sendcloud. With a Master of Science in Industrial Design, and a PhD in Interaction Design, my projects always have a strong focus on a deep understanding of the people using a product and creating frictionless experiences that are pleasant and memorable.
Occasionally I code, create websites, and design some logos. I have been creating designs professionally since 2012, starting as a freelance graphic designer, I’m currently working as Senior Product Designer at Sendcloud, making shipping easier for e-commerce merchants.
📄 More of a paper person? Download my CV.
UX designer
I design with empathy and enthusiasm. I thrive in complex design challenges with multiple stakeholders, and I never shy away from a new challenge. I build relationships with designers and stakeholders to establish design practices that people want to work with and be a part of.
Assumption validator
I continuously track user needs to quickly identify and validate opportunities, helping us stay lean and competitive. I prioritise testing the riskiest assumptions first with creative experiments. Moving from hunches to confident, user-informed, and actionable insights.
Curious by nature
Humans are the best. I love hanging out with unpredictable, irrational, complicated humans that are gaining value from the products and services that I design. With a PhD in interaction design, I have deep knowledge of mixed method research methods. GOOB is my jam: I only start designing after hanging out with the people that will use my designs.
Design thinker
Uncovering big ideas gets me super excited. I love bringing cross-disciplinary teams together to collaboratively explore solutions and solve problems. I have extensive experience planning and facilitating workshops.
I am a design researcher with particular interest in how people experience interactive IoT systems in their future everyday. With these complex systems, design becomes part of a stakeholder network that jointly creating value for people. I regard people as humans (not users) and considering their aspirations, believes, and experiences. By exploring the context in which these people behave through observations and actively involving people in research, I aim to design technology that fits people’s routines and practices.
I am a creative thinker and a team player specialising in human-centered, qualitative, and in-situ research, with a particular interest in understanding the role of technology in everyday life. I approach research hands-on by realizing high-end prototypes and evaluating them with people in their everyday life.
Experience
Dec 2025 – present
UX Specialist
ASML – Change & Configuration Management
Strategic UX Design, User Journey Mapping , Evaluative, Generative & Strategic research (Qual & Quant), Storytelling
Read more
Strategic UX Design for tools used to maintain and update lithography machinery at ASML.
Nov 2023 – Nov 2025 • 1 year
Senior UX Designer • 1 year
Sendcloud – Applications Domain
Strategic Product Design, User Journey Mapping , Evaluative, Generative & Strategic research (Qual & Quant), Storytelling
Read more
Strategic product design for all things monetisation, from subscription management to invoice insights. From defining opportunities and experiments to designing journeys and flows.
Senior User Researcher • 1 year
Sendcloud – Automation Domain
Assumption validation, Opportunity Trees, Mixed methods research, User Insights
Read more
Responsible for generative, evaluative, and strategic research for the Automation domain, comprising 5 product teams. I work in close collaboration with Product Managers to collect and validate assumptions in over 100 user interviews.
Nov 2020 – Nov 2024 • 3 years
Senior UX Designer • 1 year
CM.com – Mobile Marketing Cloud
Read more
Design & research for it’s most-used software suite. I transformed fragmented apps into a coherent SaaS suite called Mobile Marketing Cloud. I owned maturation and drove adoption of the Design Language System Aurora. I mentored interns and junior designers. Fostered data-informed decisions across squads by leading adoption of Fullstory.
UX Designer • 2 years
CM.com – Campaigns Team
Read more
I joined this conversational commerce firm to bring together a myriad of applications into one platform, providing a coherent user experience. I was responsible for B2B marketing automation software Mobile Marketing Cloud; CM.com’s most used product. I set up processes for and executed UX design & research. Extensive experience with setting up, maintaining, and evangelising adoption of a Design Language System.
2019 – 2020 • 1 year
UX Design & QA
Eindje Verder (Freelance)
Webdesign and testing of mobile applications and websites. Improving customer journey through usability testing, bug tests and performing test case executions. I sustained full-time travels in Asia and Oceania with this freelance work. www.eindjeverder.nl
2015 – 2019 • 4 years
HCI Researcher (PhD)
Eindhoven University of Technology
Thesis: Designing for the Internet of Lighting. Value chain & end-user research for IoT lighting systems in the office. Close collaboration with industry in the EU-funded OpenAIS project.
2014 • 1 year
UX Designer
SlimOpgewekt, Arnhem
Design, development, and user-testing of Prospera: an energy awareness game for kids connected to real-life energy use at home and in schools. Working in a start-up environment.
2010 – 2012 • 2 years
Graphic Designer
Cohere (Jongens van de TU), Eindhoven
Branding consultancy and design of complete graphic packages for a variety of clients: Logo’s, posters, business cards, and websites.
Education
Doctorate Industrial Design (PhD)
Eindhoven University of Technology
2015 – 2019
Doctoral dissertation: Designing for the Internet of Lighting
Master Industrial Design (MSc.)
Eindhoven University of Technology
2012 – 2014
Graduated with Excellence, project: Music as a Gift
Bachelor Industrial Design (BSc.)
Eindhoven University of Technology
2007 – 2012
Graduation project: Tessella
Volunteering
Organiser & Graphic lead
Tangible & Embodied Interaction conference 2016
2016
Read more
Treasurer & founding member
Stukafest Eindhoven Culture Festival
2012
Treasurer
Study Association Lucid
2010
Tools
Hobbies
I little bit about what I do in my free time.
🎸
Music
Music is my jam. I’m a self-thought bass and guitar player in multiple bands, mostly with my band Bag on Wheels 🥁🎺🎷🎸🎹
🌎
Travel
I like to travel and do stuff. I’ve been to funky places 🥾hiked on glaciers 🌋Climbed volcanoes ⛺Slept in Yurts 🪂Dove the sky. I just love it. Check my Polarsteps.
🎲
Boardgames
Yes, I’m a nerd. I’m disappointed if a game is done within 2 hours. All time favourites include Terraforming Mars, Steampunk Rally, and the occasional D&D party. 🐉
🤿
Scuba diving
Traveling and scuba is a golden combination. I’m actually a certified Advanced Open Water diver. If I would be reincarnated, I want to be a fish 🐠
Home automation & DIY Electronics
My wife doesn’t always like it, but I do! My house is filled with hundreds of sensors, of the shelf and self-made. 👩🏭🏠💡
Contact
I’m always looking for interesting projects and eager to hear about new opportunities. Email me at letstalk@twerff.com, or connect with me on LinkedIn