Formerly known as DAY42

About European Builders

We got tired of the talking.

So we decided to build. Two builders from Amsterdam who started out bored, kept making things, and wanted a room full of people doing the same. That room became European Builders: a community for people who build in Europe, and stay.

How it started

In 2024 we both joined Buildspace, a builder program from San Francisco. It had an energy neither of us had felt before: the builder energy. We gave each other feedback on Twitter and found out we wanted the same thing. Not just in San Francisco. In Europe.

The first investor Robbin pitched burned the idea to the ground. It became fuel. Robbin texted Rick: “Hey, I have some ideas, come over.” Rick was in almost instantly.

It started as DAY42, in Robbin's office on the Raadhuisstraat: an open evening where you bring a personal project, work on it, and show it to a room full of strangers. Today those Build Nights take place at venues like Mollie, and the people who show up keep coming back.

“You can compare building your startup with running a marathon. If you'd run it by yourself, it would probably be way harder. Every Build Night is a little sprint where we support you to get to the finish line.”

Rick Bossenbroek

Who runs it

Robbin Jansen

Co-founder

Started building at 20, during COVID, in his bedroom at his parents' house. Turned his freelance work into Future Ready, a venture studio behind ventures like Crelo and Rivilo. As a kid he wanted to be an inventor like Willie Wortel.

LinkedIn

Rick Bossenbroek

Co-founder

A self-taught builder for nine years. Runs no-code studio Uncode, started the No-Code Community in the Netherlands, spent four years rebuilding Young Creators and built RunClubs.nl. Lives by his mom's advice: “doe het dan”.

LinkedIn

What we believe

Motivate each other

“We underestimate the power of motivating each other. It can create huge momentum.” Robbin

Learn from one step ahead

“You will learn way more from someone who's just one step ahead than someone who's 10 or 20.” Robbin

Fail forward

When something doesn't work out, the question is: what's the next thing you'll work on? One builder in our community has tried five different things and keeps going.

Build like it's play

A safe builder space, not a hackathon. “If you fall down, you're not falling alone.” Rick

So far

250+

sign-ups for our events, with 100 more on the waitlist (July 2026).

13

projects shipped at Build Night #1. No pitches, no jury.

Thanks to Peter van Sabben for supporting our mission, and to everyone who hosted a room with us: Mollie, Amsterdam Tech Week, Consent Studio and Lovable.

150 Names · Nº002 & 003 Read the full conversation with Rick & Robbin By Andrea Valdivia, who came to our very first Build Night and kept coming back.

Why it matters

Europe doesn't lack builders. It lacks a way to bring them together, back them early and support them long term. We wrote down why, with the numbers.

Build with us.