Sahel Sharifymoghaddam

Hi! I am a second-year PhD student in the David R. Cheriton School of Computer Science at the University of Waterloo, where I am fortunate to be supervised by Professor Jimmy Lin. My broad research interests lie at the intersection of Information Retrieval (IR) and Natural Language Processing (NLP), with a focus on ranking, retrieval-augmented generation (RAG), grounding, and their multimodal extensions.

Before starting my Ph.D., I worked as a Software Engineer at Google, first on Google Chrome, and later on the Google Cloud-Applied AI team. At Applied AI, we built applications using Generative AI and cloud infrastructure. This followed my M.A.Sc. in Computer Engineering from the University of Toronto in 2015, advised by Professor Cristiana Amza. I earned my Bachelor's degree from Sharif University of Technology, Iran, in 2013. My complete CV is available here (last updated May 2025).

Email  /  Google Scholar  /  LinkedIn  /  GitHub  /  (Formerly Twitter)

portrait of Sahel Sharifymoghaddam

👭 Fun fact: I have a twin sister, Sayeh, who also works in machine learning and publishes under the name “S. Sharify.” It’s easy to confuse “S. Sharifymoghaddam” with “S. Sharify”--even Google Scholar does at times! While we share initials (and interests), the credit for her work is entirely hers.

Selected Publications

RankLLM: A Python Package for Reranking with LLMs


Sharifymoghaddam, S., Pradeep, R., Slavescu, A., Nguyen, R., Xu, A., Chen, Z., Zhang, Y., Chen, Y., Xian, J., & Lin, J.
International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2025)
bib / paper / code

UniRAG: Universal Retrieval Augmentation for Large Vision Language Models.


Sharifymoghaddam, S.*, Upadhyay, S.*, Chen W., & Lin, J.
Findings of the Association for Computational Linguistics (NAACL 2025) , pp. 2026--2039
bib / paper / code

Chatbot Arena Meets Nuggets: Towards Explanations and Diagnostics in the Evaluation of LLM Responses.


Sharifymoghaddam, S.*, Upadhyay, S.*, Thakur, N.*, Pradeep, R., & Lin, J.
Preprint (arXiv 2025)
bib / paper / code

Ragnarök: A Reusable RAG Framework and Baselines for TREC 2024 Retrieval-Augmented Generation Track.


Pradeep, R., Thakur, N., Sharifymoghaddam, S., Zhang, E., Nguyen, R., Campos, D., ... & Lin, J.
European Conference on Information Retrieval (ECIR 2025) , pp. 132--148
bib / paper / code

RankZephyr: Effective and Robust Zero-Shot Listwise Reranking is a Breeze!


Pradeep, R., Sharifymoghaddam, S., & Lin, J.
Preprint (arXiv 2023)
bib / paper / code

RankVicuna: Zero-Shot Listwise Document Reranking with Open-Source Large Language Models.


Pradeep, R.*, Sharifymoghaddam, S.*, & Lin, J.
Preprint (arXiv 2023)
bib / paper / code