PeopleofSuperintelligence

Researcher

Rachee Singh

Rachee Singh is a computer scientist who develops systems and algorithms for photonic interconnects that speed up distributed machine learning and planet-scale cloud workloads. She earned her Ph.D. at the University of Massachusetts Amherst in 2021 under Phillipa Gill, held a Google PhD Fellowship in 2018, and then worked as a senior researcher in Microsoft's Azure for Operators. After joining Cornell in 2023, she coauthored TACCL, a tool that synthesizes GPU collective-communication algorithms and outperformed NVIDIA's NCCL by up to 6.7x. Her 2025 papers include FlashMoE and Morphlux, and her paper on a programming language for silicon photonics won the best paper award at ACM SIGCOMM 2026. She is an assistant professor of computer science at Cornell, where she leads the sysphotonics group, and an Amazon Scholar with the SageMaker HyperPod teams.

Badges

Timeline

  1. 2018

    A Google PhD Fellowship

    In 2018, while at the University of Massachusetts Amherst, she is named a Google PhD Fellow in Systems and Networking. Her SIGCOMM 2018 paper RADWAN: Rate Adaptive Wide Area Network, written with Manya Ghobadi, Klaus-Tycho Foerster, Mark Filer and Phillipa Gill, addresses cloud optical wide-area networks. The work sees partial deployment in the Microsoft production network.

  2. 2021

    A UMass Ph.D. and Azure

    She completes her Ph.D. in computer science at the University of Massachusetts Amherst in 2021, having earned a B.E. (Hons.) at the Birla Institute of Technology and Science and developed routing protocol features for Ethernet switches at Arista Networks. Her dissertation, “Traffic Engineering in Planet-Scale Cloud Networks,” advised by Phillipa Gill, wins an Outstanding Dissertation Award from UMass Amherst's College of Information and Computer Sciences. She works as a senior researcher in the office of the CTO at Microsoft's Azure for Operators, after an earlier post as a researcher in the Mobility and Networking group of Microsoft Research in Redmond.

  3. 2023

    Professor at Cornell

    In spring 2023, the Cornell Ann S. Bowers College of Computing and Information Science welcomes her as an assistant professor of computer science. Her research interests are in computer networking, with a focus on optical interconnects and traffic engineering.

  4. April 2023

    TACCL for GPU collectives

    In April 2023, she coauthors TACCL at NSDI with researchers from the University of Texas at Austin, VMware Research and Microsoft Research. The tool lets algorithm designers guide a synthesizer toward collective-communication algorithms for a given hardware configuration, and its algorithms outperform NVIDIA's NCCL by up to 6.7x and speed up end-to-end training of Transformer-XL and BERT models by 11% to 2.3x. TACCL's code is open source in the MSCCL tools repository.

  5. 2024

    Rising Stars and NSF funding

    She takes part in the MIT Rising Stars workshop in 2024. In August 2024, she receives a $1M grant from the NSF for chip-to-chip photonic fabrics for ML.

  6. 2025

    FlashMoE and Morphlux

    In 2025, she coauthors FlashMoE with Osayamen Jonathan Aimuyo and Byungsoo Oh, a GPU-resident mixture-of-experts operator that fuses expert computation and inter-GPU communication into a single persistent kernel and reaches up to 9x higher GPU utilization; it appears at NeurIPS 2025. She also coauthors Morphlux, a server-scale programmable photonic fabric that connects accelerators within servers and lifts ML training throughput by 1.72X in a hardware prototype. She receives a Cisco Research Award in March 2025.

  7. 2026

    Best paper at SIGCOMM

    In April 2026, she is part of the Laude Institute's Moonshots cohort, with a team project on intelligent AI agents for telesurgery. Cornell announces her Bowers-LinkedIn grant in July 2026 for a caching architecture that improves efficiency in AI agents and reduces latency. In August 2026, her paper λλ, a programming language for silicon photonics, wins the best paper award at ACM SIGCOMM.

  8. As of October 2026

    Cornell professor and Amazon Scholar

    She is an assistant professor of computer science at Cornell, where she leads the sysphotonics group, which develops systems and algorithms for efficient communication on server-scale, rack-scale and long-haul photonic interconnects. She is also an Amazon Scholar in the SageMaker HyperPod teams that specialize in large-scale ML infrastructure.

Career

  1. Since 2023Cornell UniversityAssistant Professor of Computer Science
  2. NowAmazonAmazon Scholar
  3. From 2021MicrosoftSenior Researcher
  4. Microsoft ResearchResearcher

Education

  1. 2021University of Massachusetts AmherstPh.D.
  2. Birla Institute of Technology and ScienceB.E. (Hons.)

From the biography.

  1. The Massachusetts Institute of Technology trained or employed 44 of the 187 AI major-prize winners, more than any other universityIncludes Rachee Singh. The Massachusetts Institute of Technology trained or employed 44 of the 187 AI major-prize winners, more than any other university. We compare doctorate and 5+ year employment links, career timing and current workplaces for 187 major-prize and 1,111 best-paper winners.
  2. 16% of AI career moves in the 2020s went from a university to a companyIncludes Rachee Singh. We estimate that 16% of AI career moves in the 2020s went from a university to a company; 29% of moves starting at a university went to a company, and 76% ended the university role.
  3. Among employers with 30+ full-time cases, OpenAI leads primary technical role H-1B pay at $310,000, and Amazon, Google and Microsoft file 57% of all casesIncludes Amazon. Across 440,669 certified US H-1B filings from 44 employers (FY2020–FY2026), OpenAI leads primary technical role base pay at $310,000 and xAI leads overall base pay at $290,000.
  4. 20% of people at companies who shape AI also hold a university role, led by Google and Stanford UniversityIncludes Amazon. We estimate that 539 of the 6,766 people with a known current organization (8%) hold both a university role and a company role, including 20% of people at companies and 13% of people at universities.

Colleagues

People with dated positions at the same organization in the same years.

Sources and credits

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  1. Announcing the 2018 Google PhD Fellows for North America, Europe and the Middle East research.google. Checked 22 October 2026.
  2. Home | Rachee Singh racheesingh.com. Checked 22 October 2026.
  3. Research Impact and Deployment | Rachee Singh racheesingh.com. Checked 22 October 2026.
  4. Rachee Singh | Department of Computer Science | Cornell Bowers cs.cornell.edu. Checked 22 October 2026.
  5. Leveraging over-provisioned WANs for next-generation services talks.cam.ac.uk. Checked 22 October 2026.
  6. Graduate students receive special recognition cics.umass.edu. Checked 22 October 2026.
  7. Three new faculty members join Cornell Bowers CIS cs.cornell.edu. Checked 22 October 2026.
  8. TACCL: Guiding Collective Algorithm Synthesis using Communication Sketches usenix.org. Checked 22 October 2026.
  9. Rachee Singh | MIT Rising Stars risingstars-eecs.mit.edu. Checked 22 October 2026.
  10. FlashMoE: Fast Distributed MoE in a Single Kernel arxiv.org. Checked 22 October 2026.
  11. Morphlux: Transforming Torus Fabrics for Efficient Multi-tenant ML arxiv.org. Checked 22 October 2026.
  12. Moonshots // Laude laude.org. Checked 22 October 2026.
  13. 2026 LinkedIn grant recipients to drive innovation in GenAI, LLMs cs.cornell.edu. Checked 22 October 2026.