Khiem Ngo

Khiem Ngo

Research Scientist

Meta Platforms, Inc.


I received my PhD in Computer Science from Princeton University, where I was advised by Professor Wyatt Lloyd in the S* Network Systems (SNS) group. Prior to Princeton, I was a member of the Netwoked Systems Laboratory at USC. I previously received my BComp in Computer Engineering from the School of Computing at NUS. I also worked at NUS and ADSC for a few years before starting my PhD.

I am generally interested in the design, implementation and evaluation of large-scale distributed systems. During my PhD, I developed two systems: Copilot replication, a 1-slowdown-tolerant consensus protocol, and K2, a causally-consistent, partially-replicated storage system.

  • Fault Tolerance
  • Consensus
  • Storage Systems
  • Consistency
  • PhD in Computer Science, 2021

    Princeton University

  • MA in Computer Science, 2019

    Princeton University

  • BComp in Computer Engineering, 2010

    National University of Singapore


Meta Platforms, Inc.
Research Scientist
Sep 2021 – Present Menlo Park, CA
Princeton University
Graduate Research Assistant
Sep 2017 – Aug 2021 Princeton, NJ
Facebook, Inc.
PhD Software Engineer Intern
Jun 2020 – Aug 2020 Seattle, WA


Tolerating Slowdowns in Replicated State Machines
Reading Quickly from Storage Across Datacenters
Supporting Zoomable Video Streams

Recent Publications

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Tolerating slowdowns in replicated state machines. PhD Dissertation, Princeton University, 2021.
The SNOW theorem and latency-optimal read-only transactions. OSDI, 2016.


  • khiem AT khiemn DOT com