Time to Solve Real Problems 🚀
Join us and 90+ hackers from all across Europe for the BuildArena Hackathon on Feb 11-12 in Stockholm, Sweden!
​This hackathon is co-organized by Techarena, Lovable, Project Europe, European Defence Tech Hub and Inflection Fund.
Goal
​This is a special 12h (+11h without sleep) hackathon with 3 different tracks. Teams will be working in parallell in different tracks, representing different problems to solve.
Each problem is representing a real corporate problem that our track partners have asked you to solve. Our track partners are Technology Industries of Sweden, Nordic Air Defence and Sinch.
The goal is to create a ready-to-use product or an MVP that can be adopted easily by the track partner, or that represents a great start of a continued collaboration.
Application
Please apply as a team of 1-4 people. Important: each team member should fill out the application form. Solo builder is ok.Apply to a certain Track with below problem statement. You can apply to multiple tracks if you're not sure or if you enjoy multiple. Then, you will be assigned 1 track of chosen.
We will be restricted to 8 teams per track, and for those of you who come from outside of Stockholm, we will sponsor travel and accommodation.
Application deadline: January 18, 23:59 (Swedish time).
Tracks and challenges
Defense tech by Nordic Air Defence
High Altitude Counter UASMitigation of Multiple UAS ThreatsOpen Defense Track
Tech Ecosystems by Technology Industries of Sweden
Swedish Tech UnwrappedOpen track for Tech Ecosystems
Customer Communication by Sinch
Conversations by design
Visitors
To give participants time and space to focus on their projects, we'll have no visitors during the hackathon. If you're curious about the outcomes and what the teams have built, please see the final pitches at Techarena Bright Stage on February 12.
Agenda
Wed, Feb 11, 2026
Hack Day
08:30 - Doors open, Networking and setup
09:00 - Introduction presentation by Organizers, Intro to Lovable tool and credits, Intro by Track Partners
10:00 - Start Building!
11:00 - 1h check-in
12:00 - Lunch is served
15:00 - 5h check-in
18:00 - Dinner is served
20:00 - Evening check-in
22:00 - Closing of arena, take all your stuff. Continue building at home or at the hotel
Thu, Feb 12, 2026
08:30 - Deadline for sending in your pitch deck (template provided)
09:00 - Pitch presentation to track partners. Assigned slots in private loges
12:00 - Finalists of each track announced
13:00 - Final pitches on Bright Stage
14:30 - Winner announced on Main Stage
