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Ramon Caceres   Ramón Cáceres

    Email: ramon@kiskeya.net

Bio Projects Awards Publications Media CV Sailing


I am a computer science researcher and software engineer. My areas of focus have included systems and networks, mobile and edge computing, mobility modeling, security, and privacy. Most recently I worked at Google, where I built large-scale privacy infrastructure. I was previously a researcher at Bell Labs, AT&T Labs, and IBM Research. I have also held leadership positions in several startup companies.

I am an ACM Fellow and IEEE Fellow. I served on the board of the CRA Committee on Widening Participation in Computing Research. I hold PhD and MS degrees in Computer Science from the University of California at Berkeley, and a BEng from McGill University. I was born and raised in the Dominican Republic.

My CV contains a more complete career history.

Recent projects

At Google I was on the team that developed and operated Zanzibar, a global authorization system that guarantees external consistency. During my seven years on the project I improved the system's scalability, reliability, and security. I also served on the production system's on-call rotation.

Zanzibar stores and evaluates permissions to access data objects managed by Google products used by more than 1 billion people every day, including Calendar, Drive, Maps, Photos, and YouTube. It stores trillions of permissions and serves millions of authorization requests per second. It has maintained 95th-percentile latency of less than 10 milliseconds and availability of greater than 99.999% over years of production use.

I led the publication of a Zanzibar experience paper that has inspired numerous authorization systems outside of Google. They include the Ory Keto, OpenFGA, and SpiceDB open-source projects; the Authzed and Oso commercial services; and the AuthZ and Himeji systems inside Carta and Airbnb, respectively.

My CV outlines other previous work.

Awards and honors


There are more than 15,000 citations to my 81 publications.

Selected media coverage

Last updated 9 April 2024 by Ramón Cáceres