Hi, I'm Joe.

I go by @mergesort

And I share lessons about engineering, product development, design, marketing, AI, and anything you need to build a modern business.

Will working on computer

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Featured Projects

AI

Promptly

Learn to prompt like a pro by practicing with real scenarios, and get expert AI feedback to level up your AI skills.

Open Source

Boutique

A magical persistence library (and so much more) to help you build state-driven iOS and Mac apps in three lines of code.

Open Source

Recap

A drop-in, one line, fully customizable 'What's New' Screen, with a few tricks up it's sleeve.