ShadowStack · Joensuu
Joensuu's clan of AI natives
A community of builders shipping real products in real time — coding jams, nano-hacks, and events where the next wave of AI-native startups gets built.
What we do
Vibe Coding Jams
Vibe coding jams are our core ritual: short, high-energy sessions where you learn by building, not by watching. You bring an idea (or borrow one), sit down with other AI-native builders, and leave with something real. No prior experience required — just the willingness to ship.
Coding Jams
A room, a night, and a deadline. Builders pair up and ship a working product live using Cursor, Lovable, and whatever tool ships next.
Nano-Hacks
Bite-sized sprints under an hour. No slides, no theory — just prompt, build, and demo the thing you made before the timer runs out.
Demo Nights
First products meet first users. Show what you built, get real feedback, and find the people who want to build the next version with you.
From the community
What builders say
“I walked in knowing how to prompt and walked out with a working product and three people who wanted to build it with me. ShadowStack is where Joensuu actually ships.”
“The jams killed my fear of the blank page. You sit down, you build with whatever tool ships next, and by the end of the night it's real. Nothing else in Eastern Finland moves this fast.”
“It's the first place I've found where people talk less about AI and just build with it. That difference is the whole thing.”
“I came for one nano-hack and stayed for the community. This is the closest thing we have to a home base for AI-native builders up here.”
About
What is ShadowStack
ShadowStack is Joensuu's clan of AI natives — a community of builders, developers, and entrepreneurs who believe the next wave of startups will be born from people who know how to build with AI, not just talk about it.
We bring together students, founders, and creators in North Karelia to learn by doing: through coding jams, nano-hacks, and events where real products get built in real time using tools like Cursor, Lovable, and whatever ships next.
We exist because Joensuu has the talent — it just needs a place to ignite. ShadowStack is that place: part community, part launchpad, and the closest thing Eastern Finland has to a home base for AI-native founders.