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Building got cheap. Deciding got hard. You can vibe code a working app in five minutes now, so the hard part is finding out which idea is worth building. I'm Marcin Klimaszewski. I run Product Build Day, and in every episode answer one question that product managers, designers and founders keep asking, in about ten minutes. Topics: product discovery, testing ideas, vibe coding and prototyping with AI. Each episode brings a real story from our build days across Europe, numbers with sources, and one thing to try this week.

Recent episodes

Preview the first 5 minutes of any episode. Open the show in your podcast app for the full episode.

  • Should product managers learn to vibe code?

    Oct 6, 2026 · 8 min

  • You built it. Now try to kill it.

    Oct 5, 2026 · 9 min

  • Welcome to Product Build Day // Podcast!

    Oct 2, 2026 · 2 min

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