Hackathons in Brussels
Upcoming
- Thu 29 – Fri 30 Oct 2026Brussels
European AI Challenge: From Data to Policy
European Commission Joint Research Centre and FARI - AI for the Common Good Institute (ULB/VUB)
Two-day student challenge using AI and Commission geodata to map flood risk and draft policy recommendations.
Students
Past events
- Fri 2 Oct 2026Brussels
Malt x Antasphere AI Hackathon: tools for agents
Malt and Antasphere
One-day hackathon for senior AI engineers and freelancers building tools and integrations for AI agents.
By application - Sat 18 – Sun 19 Jul 2026Brussels
OpenAI Build Week Community Hackathon Brussels
Hack-Nation and North Star, in partnership with OpenAI Build Week
Community-run local weekend of a global OpenAI Codex build challenge, with mentors and local pitching.
- Mon 22 – Tue 23 Jun 2026Brussels
EU Civic Tech Hackathon
European Commission
Commission-run hackathon where civic tech practitioners from across the EU build digital tools for democratic engagement.
By application - Tue 9 – Fri 12 Jun 2026Brussels
CREAConnect Brussels Hackathon
CREAConnect (hosted by Pali Pali)
Four-day social-innovation hackathon on turning shared urban spaces into places of real connection.
By application - Fri 24 – Sun 26 Apr 2026Brussels
Brussels GameJam
Guillaume Pauli (per itch.io page)
48-hour Brussels jam for mixed teams of programmers, artists and musicians; 13 games submitted.
Game jam - Sat 28 Mar 2026Brussels
Cyber Security Challenge Belgium
Cyber Security Challenge Belgium (led by NVISO, supported by the Centre for Cybersecurity Belgium)
National student capture-the-flag: online qualifiers, then an on-site final for the best teams in Brussels.
Capture the flag Students - Tue 17 – Thu 19 Mar 2026Brussels
BOSA AI Hackathon
FPS BOSA (Belgian federal digital transformation office)
Three-day federal hackathon building sovereign, open-source AI prototypes for public administration challenges.
By application - Fri 13 – Sun 15 Mar 2026Brussels
European Defense Tech Hackathon Brussels
European Defense Tech Hub (EDTH)
Weekend defence-tech hackathon with overnight hacking and a public demo day, part of a European series.
By application - Wed 11 – Fri 13 Mar 2026Brussels
nf-core Hackathon (Brussels site)
nf-core community (local contacts from UGent and Hartwig Medical Foundation)
In-person Brussels node of a global open-source bioinformatics pipeline hackathon run across many local sites.
- Mon 2 – Tue 3 Feb 2026Brussels
Collabora Office FOSDEM Fringe Hackfest
Collabora
Two-day post-FOSDEM hackfest for Collabora Office and LibreOffice contributors and open-source newcomers.
- Fri 30 Jan 2026Brussels
Matrix Community Hackathon (FOSDEM Fringe)
Matrix.org Foundation
Free pre-FOSDEM community hack day for people building on the Matrix open messaging protocol.
- Fri 30 Jan – Sun 1 Feb 2026Brussels
Global Game Jam Brussels
Guillaume Poly and Outretaupe (Global Game Jam site)
Small Brussels site of the worldwide 48-hour game creation weekend.
Game jam - Tue 27 – Wed 28 Jan 2026Brussels
Drupal AI Hackathon: Play to Impact
European Commission (Drupal Community of Practice @ EC and EUIBAs, DG DIGIT)
Two-day hackathon at the Commission where teams prototype AI-assisted editing and no-code site building in Drupal.
- Fri 28 Nov 2025Brussels
FemTech Hackathon
Fem Futures Collective (Clusity, High Her, FutureKind)
One-day hackathon building women-centred products across health, sport, retail and finance, with around 100 participants.
- Fri 7 – Sun 9 Nov 2025Brussels
CASSINI Hackathon Brussels: EU Space for Consumer Experience
BeCentral (local organiser) for the European Commission CASSINI programme
Belgian site of the EU-wide space-data hackathon, run simultaneously in ten European locations.