App in a Day

Event Format
​Join a hands-on, in-person workshop in Barcelona designed for founders, builders, and operators who want to turn a real product idea into working software — not just talk about it.

This full-day session is built for people stuck between prototype and launch. If you’ve started building a SaaS tool, operational app, or device-side firmware, but hit a wall, this workshop helps you push it over the finish line. The focus is shipping: cutting scope, clarifying your product, and delivering a narrow, working MVP that runs at a live URL. ​

This workshop is dedicated to you and your product, and you can bring up to two guests / team members with you. We'll break your idea down into users, workflows, and implementation. We’ll tackle real blockers like authentication, data models, integrations, and deployment — and leave with a deployed app, a usable codebase and a spec you can keep building on.

We'll do requirements gathering, design and build on Specatron.com while the final output will be Claude-compatible. This is not a lecture or networking event. It’s a practical, intensive build session with a clear outcome: by the end of the day, you’ll have something real, usable, and shipped. ​The workshop takes place in central Barcelona (Eixample 46 coworking space) and is designed for people who are serious about building.

​Money-Back Guarantee
​If by the end of the day you don’t feel you’ve made real, meaningful progress toward a shipped product, you’ll get your money back. The goal is simple: you leave with something real.

The Organiser
Alex Nyberg is an engineer and technical PM with over a decade of hands-on software development. He's worked across the full stack — from embedded firmware running on vehicle hardware to cloud platforms serving Fortune 500 customers.

Throughout his career, Alex has worn every hat: developer, project manager, technical sales engineer, and founder.
He's founded three technical businesses alongside full-time roles — each one sharpening his instinct for when to build fast, when to validate first, and what teams need to stay aligned.

Costs
​In addition to the workshop fee the participants will need to cover the costs of AI tokens for the build on Specatron.com and / or Claude Code, and any costs for external integrations that your app requires.