Junxue ZHANG is the co-founder/CTO of Clustar Technology Co., Ltd. Junxue obtained his Ph.D. from computer science & engineering at iSINGLab, Hong Kong University of Science and Technology, supervised by Prof. Kai CHEN. His research interests are data center networking, machine learning systems and privacy-preserving computation.

Before joining HKUST, he received his BSc and MSc from Southeast University.

Selected Publications

[Full Publications] [Google Scholar]

  1. FLASH: Towards a High-performance Hardware Acceleration Architecture for Cross-silo Federated Learning
    Junxue Zhang, Xiaodian Cheng, Wei Wang, Liu Yang, Jinbin Hu, Kai Chen
    NSDI 2023 (To appear)

  2. LiteFlow: Towards High-performance Adaptive Neural Networks for Kernel Datapath
    Junxue Zhang, Chaoliang Zeng, Hong Zhang, Shuihai Hu, Kai Chen
    SIGCOMM 2022
    [paper] [code] [slides]

  3. Spine: An Efficient DRL-based Congestion Control with Ultra-low Overhead
    Han Tian, Xudong Liao, Chaoliang Zeng, Junxue Zhang, Kai Chen
    CoNEXT 2022

  4. Multi-Objective Congestion Control
    Yiqing Ma, Han Tian, Xudong Liao, Junxue Zhang, Weiyan Wang, Kai Chen, Xin Jin
    EuroSys 2022

  5. Sphinx: Enabling Privacy-Preserving Online Learning over the Cloud
    Han Tian, Chaoliang Zeng, Zhenhang Ren, Di Chai, Junxue Zhang, Kai Chen, Qiang Yang
    Oakland 2022

  6. Enabling ECN for Datacenter Networks with RTT Variations
    Junxue Zhang, Wei Bai, Kai Chen
    CoNEXT 2019
    [paper] [code] [slides]

  7. Resilient Datacenter Load Balancing in the Wilds
    Hong Zhang, Junxue Zhang, Wei Bai, Kai Chen, Chowdhury Mosharaf
    SIGCOMM 2017
    [paper] [code]

Industry Experience

2018 - Now, Co-founder/CTO, Clustar Technology Co., Ltd

Professional Services & Activities

  1. APNet 23 Sponsorship Chair

  2. EuroSys 23 Shadow PC Member

  3. IEEE Transactions on Cloud Computing Reviewer

  4. IEEE Transactions on Big Data Reviewer

  5. ACM Transactions on Intelligent Systems and Technology Reviewer

  6. Knowledge-Based Systems Reviewer

  7. FL-IJCAI 2021, FL-IJCAI 2022, FL-AAAI 2022 TPC Member

  8. FATE Maintainer


  1. SIGCOMM 17 Travel Grants, 2017

  2. Postgraduate Fellowship, HKUST

  3. Google Excellent Student Scholarship, 2012

  4. National Scholarship 2014, 2011


Junxue is an amateur photographer, mainly at landscape and sometimes portrait. He likes coffee and is a freshman in latte art. He also has a not-very-large LEGO collection. Junxue has one cat named Little Silver (小盐) and one dog named Little White (小白).