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Juno Park

Juno Park, design engineer in Rotterdam

I design interfaces, then build them myself. The details survive the handoff because there isn't one.

Booking projects for March 2027

A design engineer in Rotterdam, working with one product team at a time for twelve weeks or longer. Design and front end, start to ship.

Start a projectSee the work

Four things I drew, then shipped.

Each one designed and built by me, usually alongside a small team. Open one for the long version: the problem, what I did, and what the numbers did after.

  1. Ferrybook, 2026 / Product design, front end

    Booking went from six taps to two. Mobile conversion up 31%.

    +31%mobile conversion

  2. Northdeck, 2025 / Design system lead

    46 components, one token set. New screens ship in four days, not three weeks.

    46components, down from 212 patterns

  3. Ondo Radio, 2025 / Design engineer

    Press play to sound in 0.6 s, down from 2.4 s, in a 9 KB player.

    0.6 splay to sound, from 2.4 s

  4. Verso, 2024 / Interaction design, prototyping

    Median reading session up from 4 to 11 minutes.

    11 minmedian session, from 4

What has my attention this month. A now page: what I'd tell you if we met this week.

Right now I'm writing a 3 KB spring library., learning Dutch, slowly., restoring a 1974 Batavus., booking spring 2027.

It's at my desk in Katendrecht, Rotterdam: an old harbour quarter, a ferry ride from the centre. This page was last updated on .

juno@katendrecht: ~
$ juno now
building  spring, a 3 KB motion lib
reading   a 1961 railway sign manual
fixing    a 1974 Batavus, slowly
learning  Dutch (B1, allegedly)
$ juno next
Mar 2027  one team, 12 weeks

Eleven years on both sides of the handoff.

Trained as an interaction designer, hired as an engineer, and stubborn enough to keep doing both.

Years shipping
11
Products launched
38
Design systems
3
  1. Completed: Academy of Art & Design
    BA Interaction Design, RotterdamGraduated with a working pinball machine about bureaucracy. It scored you on forms filed.
  2. Completed: Studio Brandwerk
    Interaction designer, AmsterdamCampaign sites, two museum installations, and a ticket kiosk that still runs in a train station.
  3. Completed: Lumen Mobility
    Senior front-end engineer, UtrechtBuilt the rider app's web views and the fleet dashboard. Learned to love maps and to fear time zones.
  4. Completed: Northdeck
    Staff design engineer, RotterdamLed the design system and the front-end platform team: four engineers, one designer, 46 components.
  5. Independent
    Design engineer, RotterdamA studio of one. Product teams bring me in for the stretch between the design file and production.

Notes from the workbench.

Short essays on motion, light and the space between design and code. Roughly one a quarter, and the first few paragraphs are here.

/ 6 min read

Light should mean something. Notes from a weekend bending glass with a sign maker in Schiedam.

  1. / 9 min read

    Every gap between a design file and a pull request is a place where details go to die.

  2. / 7 min read

    Most of your users aren't on your phone. A field guide to testing on a slow device.

  3. / 5 min read

    Why I keep one curve for things arriving and one for things leaving, and delete the other forty.

Got something that has to feel right?

Tell me what you're making and where it hurts. A few honest sentences beat a polished brief.

Replies
Within two working days, from me, not a form.
Based
Rotterdam, on CET. Calls on Tuesdays and Thursdays.

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