I am an assistant professor of Computer Science at Cornell University where I lead the sysphotonics group. The sysphotonics group develops systems and algorithms for efficient communication on server-scale, rack-scale and long-haul photonic interconnects. We use these systems to improve the performance of important applications like distributed machine learning and general planet-scale cloud workloads.
I am also an Amazon Scholar in the SageMaker Hyperpod teams that specialize in large-scale ML infrastructure.
News
- 2026.06: Excited to receive a Jane Street Research Award!
- 2026.06: Excited to receive a LinkedIn Faculty Research Award!
- 2026.04: Excited to receive a Google Research Award!
- 2026.04: Excited to be a part of the Moonshot cohort funded by Laude Institute!
- 2026.03: Arjun’s work on in-network analog computing won the outstanding paper award at OFC!
- 2025.07: Awarded an NSF grant to achieve efficient collective communication in the cloud!
- 2025.03: Thrilled to receive a Cisco Research Award!
- 2025.01: SRC and DARPA fund my group as part of the JUMP 2.0 program!
- 2024.12: Atkinson Center for Sustainability funds our work on photonic interconnects!
- 2024.08: Received a $1M grant from the NSF on chip-to-chip photonic fabrics for ML!
Publications
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- Photonic Rails in ML Datacenters
- Eric Ding, Barry Lyu, Bhaskar Kataria, Rachee Singh
- ACM Special Interest Group on Data Communications (SIGCOMM), 2026
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- λλ: a programming language for photonic switches
- Vaibhav Mehta, Arjun Devraj, Bill Owens, Justin Hsu, Rachee Singh
- ACM Special Interest Group on Data Communications (SIGCOMM), 2026
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- TVCache: A Tool-Value Cache for Post-Training LLM Agents
- Abhishek Vijaya Kumar, Bhaskar Kataria, Byungsoo Oh, Emaad Manzoor, Rachee Singh
- Forty-Third International Conference on Machine Learning (ICML), 2026
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- Reconfigurable Torus Fabrics for Multi-tenant ML
- Abhishek Vijaya Kumar, Eric Ding, Arjun Devraj, Darius Bunandar, Rachee Singh
- ACM International Conference on Architectural Support for Programming Languages and Operating System (ASPLOS), 2026
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- In-Network Analog AllReduce for ML with Programmable Integrated Photonics
- Arjun Devraj, Bill Owens, Daniel Perez Lopez, Rachee Singh
- Optical Fiber Communications (OFC), 2026 (Oral and top scored paper)
- Winner of the Corning Outstanding Paper Award!
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- What Obstructed Skies Teach Us about Satellite Internet
- Bhaskar Kataria, Hammas Bin Tanveer, Rishab Nithyanand, Rachee Singh
- New Ideas in Networked Systems (NINES 2026)
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- HEDGE: Traffic Engineering with Probabilistic Link Capacities
- Arjun Devraj, Bill Owens, Umesh Krishnaswamy, Ying Zhang, Rachee Singh
- USENIX Symposium on Networked Systems Design and Implementation (NSDI), 2026
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- Learning to Tune Optical WANs: Field Deployment of a Learned Noise Model
- Bhaskar Kataria, Howard Hua, Bill Owens, Andrea D’Amico, Rachee Singh
- USENIX Symposium on Networked Systems Design and Implementation (NSDI), 2026
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- FlashMoE: Fast Distributed MoE in a Single Kernel
- Jonathan Aimuyo, Byungsoo Oh, Rachee Singh
- Conference on Neural Information Processing Systems (NeurIPS), 2025 (main track)
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- Photonic Rails in ML Datacenters
- Eric Ding, Chuhan Ouyang, Rachee Singh
- Twenty-Fourth ACM Workshop on Hot Topics in Networks (HotNets), 2025
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- Software Managed Networks via Coarsening
- Pradeep Dogga, Rachee Singh, Suman Nath, Ravi Netravali, Jens Palsberg, George Varghese
- Twenty-Fourth ACM Workshop on Hot Topics in Networks (HotNets), 2025
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- The Reality of Chasing Shannon’s Limit in Optical Wide-Area Networks
- Arjun Devraj, Bill Owens, Rachee Singh
- ACM Internet Measurement Conferenc (IMC), 2025
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- Aqua: Network-Accelerated Memory Offloading for LLMs in Scale-Up GPU Domains
- Abhishek Vijaya Kumar, Gianni Antichi, Rachee Singh
- ACM International Conference on Architectural Support for Programming Languages and Operating System (ASPLOS), 2025
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- Chip-to-Chip Photonic Connectivity in Multi-Accelerator Servers for ML
- Abhishek Vijaya Kumar, Arjun Devraj, Darius Bunandar, Rachee Singh
- Optical Fiber Communications (OFC), 2025 (Oral)
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- PipSwitch: A Circuit Switch Using Programmable Integrated Photonics
- Eric Ding, Rachee Singh
- Optical Fiber Communications (OFC), 2025
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- Efficient multi-WAN transport for 5G with OTTER
- Mary Hogan, Yiming Qiu, Gerry Wan, Sharad Agarwal, Ryan Beckett, Rachee Singh, Victor Bahl
- USENIX Symposium on Networked Systems Design and Implementation (NSDI), 2025
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- A case for server-scale photonic connectivity
- Abhishek Vijaya Kumar, Arjun Devraj, Darius Bunandar, Rachee Singh
- Twenty-Third ACM Workshop on Hot Topics in Networks (HotNets), 2024
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- An optical slice of the wide-area network
- Abhishek Vijaya Kumar, Bill Owens, Nikolaj Bjorner, Binbin Guan, Yawei Yin, Victor Bahl, Rachee Singh
- USENIX Symposium on Networked Systems Design and Implementation (NSDI), 2024
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- Teal: Learning-Accelerated Optimization of WAN Traffic Engineering
- Zhiying Xu, Francis Y. Yan, Rachee Singh, Justin T. Chiu, Alexander M. Rush, Minlan Yu
- ACM Special Interest Group on Data Communications (SIGCOMM), 2023
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- OneWAN is better than two: Unifying a split wide-area network architecture
- Umesh Krishnaswamy, Rachee Singh, Paul Mattes, Paul-Andre C Bissonette, Nikolaj Bjorner, Zahira Nasrin, Sonal Kothari, Prabhakar Reddy, John Abeln, Srikanth Kandula, Himanshu Raj, Luis Irun-Briz, Jamie Gaudette, Erica Lan
- USENIX Symposium on Networked Systems Design and Implementation (NSDI), 2023
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- Making Sense of Constellations: Methodology for Understanding Starlink’s Scheduling Algorithms
- Hammas Bin Tanveer, Mike Puchol, Rachee Singh, Antonio Bianchi, Rishab Nithyanand
- International Conference on emerging Networking EXperiments and Technologies (ACM CoNEXT), 2023
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- Glowing in the dark: Uncovering IPv6 address discovery and scanning strategies
- Hammas Bin Tanveer, Rachee Singh, Paul Pearce, Rishab Nithyanand
- USENIX Security Symposium (USENIX Security), 2023
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- TACCL: Guiding Collective Algorithm Synthesis using Communication Sketches
- Aashaka Shah, Vijay Chidambaram, Meghan Cowan, Saeed Maleki, Madan Musuvathi, Todd Mytkowicz, Jacob Nelson, Olli Saarikivi, Rachee Singh
- USENIX Symposium on Networked Systems Design and Implementation (NSDI), 2023
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- Traffic engineering: from ISP to cloud wide-area networks
- Rachee Singh, Nikolaj Bjorner, Umesh Krishnaswamy
- ACM SIGCOMM Symposium on SDN Research (SOSR), 2022
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- Decentralized cloud wide-area network traffic engineering with BlastShield
- Umesh Krishnaswamy, Rachee Singh, Nikolaj Bjorner, Himanshu Raj
- USENIX Symposium on Networked Systems Design and Implementation (NSDI), 2022
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- Cost-effective capacity provisioning in wide area networks with Shoofly
- Rachee Singh, Nikolaj Bjorner, Sharon Shoham, Yawei Yin, John Arnold, Jamie Gaudette
- ACM Special Interest Group on Data Communications (SIGCOMM), 2021
- Press Coverage:APNIC Blog
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- PredictRoute: A Network Path Prediction Toolkit
- Rachee Singh, David Tench, Phillipa Gill, Andrew McGregor
- ACM SIGMETRICS, 2021
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- Surviving switch failures in cloud datacenters
- Rachee Singh, Muqeet Mukhtar, Ashay Krishna, Aniruddha Parkhi, Jitendra Padhye, David Maltz
- SIGCOMM Computer Communication Review (CCR), 2021
- Press Coverage:The Next Platform
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- Cost-effective Cloud Edge Traffic Engineering with Cascara
- Rachee Singh, Sharad Agarwal, Matt Calder, Victor Bahl
- USENIX Symposium on Networked Systems Design and Implementation (NSDI), 2021
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- Characterizing the performance and deployment of Multi-CDNs
- Rachee Singh, Arun Dunna, Phillipa Gill
- ACM Internet Measurement Conference (IMC), 2018
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- RADWAN: Rate Adaptive Wide Area Network
- Rachee Singh, Manya Ghobadi, Klaus-Tycho Foerster, Mark Filer, Phillipa Gill
- ACM Special Interest Group on Data Communications (SIGCOMM), 2018
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- Run, Walk, Crawl: Towards Dynamic Link Capacities
- Rachee Singh, Manya Ghobadi, Klaus-Tycho Foerster, Mark Filer, Phillipa Gill
- ACM Hot Topics in Networking (HotNets), 2017
- Community Dialogue: HotNets Dialogue
- Press Coverage:Microsoft Research Blog, Datacenter Knowledge
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- Characterizing the Nature and Dynamics of Tor Exit Blocking
- Rachee Singh, Rishab Nithyanand, Sadia Afroz, Paul Pearce, Michael Carl Tschantz, Phillipa Gill, Vern Paxson
- USENIX Security Symposium (Security), 2017
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- The Politics of Routing: Investigating the Relationship Between AS Connectivity and Internet Freedom
- Rachee Singh, Hyungjoon Koo, Najmehalsadat Miramirkhani, Fahimeh Mirhaj, Phillipa Gill, Leman Akoglu
- USENIX Free and Open Communications on the Internet (FOCI), 2016