Publications

  • Outstanding Paper Award
    Richeek Das*, Sahasra Ranjan*, Shreya Pathak, Preethi Jyothi. (*Equal contribution)
    Improving Pretraining Techniques for Code-Switched NLP.
    ACL 2023 (61st Annual Meeting of the Association for Computational Linguistics)
    [Paper] [Code]
  • 170+ Citations
    Alexander Kroll, Sahasra Ranjan, Martin K. M. Engqvist, Martin J. Lercher.
    A general model to predict small molecule substrates of enzymes based on machine and deep learning.
    Nature Communications, 2023
    [Paper] [Web Server]
  • Alexander Kroll, Sahasra Ranjan, Martin J. Lercher.
    A multimodal Transformer Network for protein-small molecule interactions enhances predictions of kinase inhibition and enzyme-substrate relationships.
    PLoS Computational Biology, 2024
    [Paper] [Web Server]

Research Experience

Code-Switched NLP Research

Advisor: Prof. Preethi Jyothi | CSALT Lab, IIT Bombay | Jul 2022 - May 2023

Novel pretraining techniques for multilingual code-switching. Published at ACL 2023 with Outstanding Paper Award.

Enzyme-Substrate Prediction with Protein Language Models

Advisor: Prof. Martin J. Lercher | Heinrich Heine University Düsseldorf, Germany | May 2021 - Jun 2023

ML models for enzyme-substrate prediction. Published in Nature Communications and PLoS Computational Biology.

Catastrophic Forgetting in Neural Networks

Advisors: Prof. Preethi Jyothi, Prof. Manoj Prabhakaran | IIT Bombay | 2022 - 2023

Committee-based optimization to address catastrophic forgetting. Awarded Research Excellence Award.

Education & Awards

Indian Institute of Technology Bombay

B.Tech in Computer Science and Engineering | Aug 2019 - May 2023

Awards & Honors

  • ACL 2023 Outstanding Paper Award — Awarded to <1% of accepted papers at the premier NLP conference
  • Thomas Dooie Research Excellence Award — Best Bachelor's Thesis, IIT Bombay (top 2-4 graduates per year)
  • JEE Advanced 2019 — All India Rank 127 out of 1.2 million candidates

Industry Experience

Founding AI Engineer

Stealth Startup | Sunnyvale, CA | Aug 2025 - Present

Co-founder & CTO

Mathkraft | San Francisco, CA | Nov 2024 - May 2025

AI tutoring startup for K-8 math education with adventure-based learning.

Software Engineer

Rubrik | Bangalore, India | Jun 2023 - Jul 2024

Cloud data infrastructure and distributed storage systems.