Haoran Zhang

I am a Byzantine general now chasing gradients, or, technically, an applied research scientist at NVIDIA ADLR. Previously, I was a research scientist at Meta AI and Systems Co-design.

I obtained my Ph.D. in Computer Science from University of Pennsylvania, where I was co-advised by Vincent Liu and Sebastian Angel. Before Penn, I earned a B.E. in Computer Science from Tsinghua University.

I'm allergic to cats, but the advent of CaaS (Cat-as-a-Service) has made cloud petting possible. 瓜皮 (➔) is my favorite.

My email addresses are haoranz [at] nvidia [dot] com (business) and contact [at] this domain (personal). You can also find me on GitHub, LinkedIn, and Google Scholar.

Education

• 2019 - 2024, Ph.D. in Computer Science University of Pennsylvania
• 2014 - 2019, B.E. in Computer Science Tsinghua University
• 2011 - 2014 Shanghai Qibao High School

Blog

• Linear Attention, Visualized (25 Jul 2026)

Publications

• CausalMesh: A Causal Cache for Stateful Serverless Computing
  Haoran Zhang , Shuai Mu , Sebastian Angel , and Vincent Liu
  VLDB 2025 [PDF] [Code] [Perspective by Phil Bernstein]
  Best Paper Award Nominee
  ACM SIGMOD Research Highlight Award
• Beaver: Practical Partial Snapshots for Distributed Cloud Services
  Liangcheng Yu , Xiao Zhang , Haoran Zhang , John Sonchack , Dan R. K. Ports , and Vincent Liu
  OSDI 2024 [PDF] [Code]
• Mucache: a General Framework for Caching in Microservice Graphs
  Haoran Zhang* , Konstantinos Kallas* , Spyros Pavlatos , Rajeev Alur , Sebastian Angel , and Vincent Liu
  NSDI 2024 [PDF] [Code]
• XFaaS: Hyperscale and Low Cost Serverless Functions at Meta
  Alireza Sahraei , Soteris Demetriou , Amirali Sobhgol , Haoran Zhang , Abhigna Nagaraja , Neeraj Pathak , Girish Joshi , Carla Souza , Bo Huang , Wyatt Cook , Andrii Golovei , Pradeep Venkat , Andrew McFague , Dimitrios Skarlatos , Vipul Patel , Ravinder Thind , Ernesto Gonzalez , Yun Jin , and Chunqiang Tang
  SOSP 2023 [PDF]
• Executing Microservice Applications on Serverless, Correctly
  Konstantinos Kallas* , Haoran Zhang* , Rajeev Alur , Sebastian Angel , and Vincent Liu
  POPL 2023 [PDF] [Code]
• Fault-tolerant and Transactional Stateful Serverless Workflows
  Haoran Zhang , Adney Cardoza , Peter Baile Chen , Sebastian Angel , and Vincent Liu
  OSDI 2020 [PDF] [Code] [Extended Report]
• Automatic diagnosis of macular diseases from OCT volume based on its two-dimensional feature map and convolutional neural network with attention mechanism
  Yankui Sun , Haoran Zhang , and Xianlin Yao
  JBO 2020 [PDF]

Preprints

• OneFlow: Redesign the Distributed Deep Learning Framework from Scratch
  Jinhui Yuan , Xinqi Li , Cheng Cheng , Juncheng Liu , Ran Guo , Shenghang Cai , Chi Yao , Fei Yang , Xiaodong Yi , Chuan Wu , Haoran Zhang , and Jie Zhao
  [PDF] [Code]

Teaching Assistant

• CIS 455/555: Internet and Web Systems (Spring 2022)
  
• CIS 548: Operating Systems Design and Implementation (Spring 2021)
  

Services

• Program Committee (APSys 2025)
  
• Artifact Evaluation Committee (SOSP 2021)
  

Experiences

• Meta Bellevue, WA, USA
  Research Scientist Jul 2024 - Feb 2026
• Meta Bellevue, WA, USA
  SDE Intern May 2023 - Aug 2023
• Meta Bellevue, WA, USA
  SDE Intern May 2022 - Aug 2022
• ByteDance Seattle, WA, USA
  Research Intern May 2021 - Aug 2021
• ByteDance Beijing, China
  SDE Intern Mar 2019 - Jun 2019
• New York University New York, NY, USA
  Research Assistant Jun 2018 - Sep 2018
• Microsoft Research Asia (MSRA) Beijing, China
  Research Intern Oct 2016 - Dec 2016