John Wittrock

I’m currently a software engineer at Sidewalk Labs where I lead a small team thinking about privacy-preserving digital identity for cities.

I was previously at AppNexus, where I worked on distributed systems for ad tech. We did some cool stuff in the ad mines, including a custom epoch-based memory allocator, the world’s fastest itoa, and several interesting indexing data structures.

Old Projects

foghorn

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hotpatching

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vividperf

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