Tijmen Steenvoorden
Open to conversations Noordwijk, NL

TijmenSteenvoorden

Product designer at KYP, software for construction companies with around 12,000 daily users.

Eight years designing apps and platforms. I work in the product team, with developers, product, sales and marketing. Design there has become something we do together.

Work

KYP

2024 – now

System, brand and platform

Read the KYP case

Software for construction companies with around 12,000 daily users. I redesigned the main product during a frontend migration and built the design system the team works with.

The KYP planning screen before: a thick border around the grid, a heavy side navigation and a full row of zoom controls.
Before
The same screen after: no border, the zoom controls floating over the grid, two more rows of planning in view.
After

The planning screen, before and after. Drag the handle to compare.

Who I work with
I'm in the product team, with the developers and the product owners. I did the rebrand with marketing, and sales takes me along to client calls and site visits.
The design system
It started as a small set of colours, spacing rules and components. Product now puts a lot of the screens together themselves.

Piek

Cashless payments for festivals of up to 20,000 visitors, used at about 50 of them. The till worked like a calculator, so a volunteer could sell on a first shift without training.

2019 – 2021

Designed at Doordacht with its CEO, built by Move4Mobile.

Read the Piek case
Piek wallet: a balance of 12,73 euro and a list of recent spending at the festival.
Balance
Piek pay screen: a QR code for the vendor to scan, with the token balance on top.
Pay
Piek top-up screen for adding money to the wallet.
Top up
Piek event screen with information about the festival.
Event

Smaakpupil

2022

MVP and research

Read the Smaakpupil case

A test of eleven questions that helps people who have lost their sense of taste enjoy eating again. I designed the web portals and the app.

An older hand tapping through the Smaakpupil taste test on a tablet in a wooden stand, on a kitchen table.

Woonmapp

2021

MVP and platform

Read the Woonmapp case

One place for every document about a house, so a property transfer has a single place to hand over. Made in a team of seven, with two designers.

Señor Wooly

2017

Platform and gamification, at Moij

Read the Señor Wooly case

A platform for learning Spanish through songs and stories. We gave students a way to track their progress, and a coin to spend on avatars.

Projects

Numa

A RAW photo editor for Linux, iPhone, iPad and Mac. I was the product designer, Claude Code wrote the code.

2026 – now

Desktop, mobile and a home server

Read the Numa case
Numa on Linux: editing a mountain lake photo with a sky mask, the light sliders at rest on the right.
Numa on iPad: colour grading a mountain lake photo, the sliders at rest.
iPad, colour grading
Numa on iPhone: the same grade, with a colour wheel over the photo.
iPhone, the same grade

When I switched to Linux, I couldn't find an editor with the UX of Lightroom or the power of Capture One. Certainly not one for Fujifilm RAW files. So it started as a small project, and it grew into all this.

Experience

  1. 2024 – now

    KYP

    Product designer, Noordwijk

    I design for all four products: user research on construction sites, the design system, prototypes in real code, and brand work with marketing.

  2. 2019 – 2024

    Doordacht

    UX/UI designer, Bodegraven

    Product design for Piek, Woonmapp and Smaakpupil. On Woonmapp I was one of two designers in a team of seven. Requirements, interviews and testing.

  3. 2017 – 2018

    Moij

    Digital designer, Amsterdam

    Websites, banners and a design system for Señor Wooly, so their team could make new visuals.

What I do

Interface design, product thinking, user research, delivery and prototyping.

Tools

Figma, Adobe Suite, Claude Code, Mixpanel, Storybook, YouTrack, Notion.

Languages

Dutch and English.