Sepehr Abdous

sabdous1[AT]jh[DOT]edu . sepehrabdous1375[AT]gmail[DOT]edu

During my Ph.D., I was part of the HopNets Lab, advised by Dr. Soudeh Ghorbani. My research focused on improving the performance and reliability of modern networks. I developed mechanisms to detect and quantify congestion events in datacenter networks, the critical infrastructure underpinning much of today’s Internet. I also proposed techniques to mitigate congestion within individual datacenters and across interconnected datacenter fabrics. Later in my Ph.D., as large-scale Artificial Intelligence (AI) training workloads rapidly expanded, my research shifted toward emerging challenges in AI datacenters, including reducing bandwidth inefficiencies in distributed training jobs and enabling scalable, high-throughput network performance.


Education

Johns Hopkins University

Ph.D., School of Computer Science

Baltimore, MD

2019 - 2026

Johns Hopkins University

School of Computer Science

Baltimore, MD

2019 - 2023

Sharif University of Technology

School of Computer Engineering

Tehran, Iran

2014 - 2019

Publications

Papers

One to Many: Closing the Bandwidth Gap in AI Datacenters with Scalable Multicast

Sepehr Abdous, Jinqi Lu, Jiacheng Wan, Erfan Sharafzadeh, Ying Zhang, Soudeh Ghorbani

PDF    Slides

HotNets 2025

Uno: A One-Stop Solution for Inter- and Intra-Datacenter Congestion Control and Reliable Connectivity

Tommaso Bonato*, Sepehr Abdous*, Abdul Kabbani, Ahmad Ghalayini, Nadeen Gebara, Terry Lam, Anup Agarwal, Tiancheng Chen, Zhuolong Yu, Konstantin Taranov, Mahmoud Elhaddad, Daniele De Sensi, Soudeh Ghorbani, Torsten Hoefler (*Equal contribution)

PDF    Slides    Artifacts

SC 2025

Tempus: Probabilistic Network Latency Verification

Sepehr Abdous*, Senapati Diwangkara*, Soudeh Ghorbani (*Equal contribution)

PDF    Artifacts

IEEE Access 2024

Practical Packet Deflection in Datacenters

Sepehr Abdous, Erfan Sharafzadeh, Soudeh Ghorbani

PDF    Slides    Artifacts

CoNEXT 2023

Understanding the impact of the host networking elements on traffic bursts

Erfan Sharafzadeh, Sepehr Abdous, Soudeh Ghorbani

PDF    Slides    Artifacts

NSDI 2023

Burst-tolerant Datacenter Networks with Vertigo

Sepehr Abdous*, Erfan Sharafzadeh*, Soudeh Ghorbani (*Equal contribution)

PDF    Slides    Artifacts

CoNEXT 2021

Posters

Implementable selective deflection with Canary

Sepehr Abdous, Erfan Sharafzadeh, Soudeh Ghorbani

Abstract    Poster

NSDI 2023

Vertigo: A Priority-aware Burst-tolerant Datacenter Fabric

Sepehr Abdous, Erfan Sharafzadeh, Sougol Gheissi, Soudeh Ghorbani

Poster

CSLSC 2021

Valinor: Transport-Agnostic Packet Prioritization and Ordering at the Edge

Erfan Sharafzadeh, Sepehr Abdous, Sougol Gheissi, Soudeh Ghorbani

Poster

CSLSC 2021

Work Experience

Microsoft

Consulting researcher

During my time at Microsoft, we designed Uno, a unified congestion control scheme that operates both within and across large-scale datacenter networks.

2024-2025

CCC Intelligent Solutions

Intern

As an intern on the AI Enablement team, I designed and implemented a high-performance data migration technique that significantly improved the speed of transfers between the company's remote storage servers.

2022

Johns Hopkins University

Teacher Assistant

During my Ph.D., I served as a TA 3 times across the following courses: “Computer Networks” and “Cloud Computing”.

2019 - 2025

UCLA remap group

Research intern

As an intern on the UCLA REMAP team under the supervision of Prof. Jeff Burke, I integrated Named Data Networking (NDN) APIs into the Chromium codebase.

2018

HPDS(High Performance Data Storage) Company

Intern

I was responsible for automating the system update process and performing system-level FIO benchmarking tests.

2018

Darmaneh

Frontend Developer

Darmaneh was a startup focused on building a platform for online medical consultations. I was responsible for developing and maintaining the Android and iOS applications.

2016 - 2018

Sharif University of Technology

Teacher Assistant

As an undergraduate, I served as a teaching assistant 14 times across the following courses: “Fundamentals of Programming”, “Advanced Programming”, “Data Structures”, “Operating Systems”, “Numerical Methods”, “Computer Structure”, and “Mathematical Statistics”.

2015 - 2019

Skills

Programming Languages & Tools

Professional Service

  • Journal reviewer for Computer Networks (2022-2024)
  • Journal reviewer for Journal of Network and Computer Applications (2022-2024)
  • Journal reviewer for Ad Hoc Networks (2022-2023)
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