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About Me

My name is William Casarin, also known as jb55 online as you might have guessed. I am a software engineer, I mainly build software for early stage startups to help them get off the ground.

Links

Email (jb55@jb55.com)

Fediverse

Twitter

Experience

CTO @ Monstercat: Built their initial artist payment systems, enabling them to pay artists monthly which was a relatively new concept at the time.

Plastiq: Rebuilt their internal payment risk system

Blockstream: Helped with Aqua, their user-friendly bitcoin wallet. Worked on upgrading their low level c++/rust libraries to support electrum

Steamoji: Building schooling software for kids to learn STEAM skills