Nice to meet you, my name is Justus.

I build companies, and I've mostly done it the same way: small, bootstrapped, no outside money, no paid marketing. If something grew, it grew because the product was good enough that people came back and told someone else. Right now I'm building Selda, the tool for finding your first customers that I wish I'd had every time I shipped something and didn't know who to reach. Based in Helsinki.

I'm less interested in ideas than in whether a thing actually works when a real person uses it. Building is the easy part now. Getting it in front of the right people is where almost everything dies. That gap is the problem I keep coming back to. The best product in the room rarely wins; the one that reaches people does.

Some of what I'm doing and have done:

Founder of Selda(2026, now), the GTM tool I wish I'd had every other time.
Co-founder, then CEO, of a startup (2023–26).
Founder & owner of Evex Creative (2019, now), a marketing and creative agency I grew to a team of around 15.
Founder of Terassikesä.fi (2020, now). Launched at 15, expanded to Sweden, still running, hundreds of thousands of visits in its summers.
BernerSoft, software and websites I build for other companies and projects.
Berner Event, event tech and production for festivals, and how I've found the people I trust to build with.
Raflakeskus, my first real shot at a platform. Focus was never sharp enough to take off, but it taught me a lot and is still live.
Co-founder of Nopee ry, a youth non-profit in Söderkulla where young people run their own workshop and projects.

How I think about it: leverage over headcount, distribution over invention, systems that keep running so I don't do the same task a hundred times. Under-promise, over-deliver, and let the result do the talking. Earn trust through the product, never buy it. I want the people who make good things to be the ones who win, even if selling was never their strength.

If you're building something and every conversation feels like pulling a rope through a keyhole, drop me a line. I reply to things that are specific, short, and thought through.

Email · X · LinkedIn · GitHub

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Ilta-Sanomat / Taloussanomat (2022) — building a company as a teenager.
OP Media (2021) — “I always think big”, on starting the first company at 16.
Sipoo, Kuntatiedote 1/23 (2023, PDF) — portrait feature.
Sipoon Sanomat (2022) — early entrepreneurship.