Sahasra Ranjan

Co-Founder

San Francisco, California, United States3 yrs 6 mos experience

Key Highlights

Co-authored papers in Nature Communications.
Developed innovative AI solutions for education.
First author of ACL’23 Outstanding Paper.

Stackforce AI infers this person is a highly skilled AI/ML researcher with a focus on healthcare applications.

Contact

Skills

Core Skills

Natural Language Processing (nlp)Machine LearningEducation

Other Skills

AlgorithmsComputational BiologyData AnalysisData StructuresEngineeringLeadershipMicrosoft Azure Machine LearningProblem SolvingResearchTraining

About

I’m a CS grad from IIT Bombay who enjoys building at the intersection of AI, language, and biology. I've published in Nature Communications and ACL, worked on NLP and enzyme–substrate prediction, and co-founded Mathkraft, an AI math tutor making learning fun and visual for kids.

Experience

Stealth

Founding Engineer

Aug 2025 – Present · 7 mos · San Francisco Bay Area

Mathkraft

Co-Founder and CTO

Oct 2024 – Jun 2025 · 8 mos · San Francisco Bay Area · On-site

Rubrik

Software Engineer

Jun 2023 – Jun 2024 · 1 yr · Bengaluru, Karnataka, India · On-site

Part of the Data Lifecycle team.

University of düsseldorf

Research Scholar

Nov 2022 – May 2023 · 6 mos · Düsseldorf, North Rhine-Westphalia, Germany · On-site

Co-authored two high-impact papers on protein language modeling, including one in Nature Communications. Developed a multi-modal BERT integrating ESM-1b and ChemBERTa, boosting prediction accuracy from ~80% to ~94%, outperforming SOTA in enzyme-substrate and drug-target prediction.

Natural Language Processing (NLP)Computational BiologyMachine Learning

Indian institute of technology, bombay

2 roles

Teaching Assistant

Jul 2022 – Mar 2023 · 8 mos · Mumbai, Maharashtra, India

Assisted Prof. Preethi Jyothi in enhancing postgraduate courses on machine learning and automated speech recognition course. Prepared and evaluated assignment and exam problems for the courses.

Machine LearningEducation

Research Assistant

Jun 2022 – May 2023 · 11 mos · Mumbai, Maharashtra, India

First author of ACL’23 Outstanding Paper (<1% of accepted papers): Switch-MLM, a novel pretraining method for code-switched NLP, boosting multilingual model performance by 3–4% F1 with dynamic switch-point learning.

Natural Language Processing (NLP)Machine Learning

Rubrik, inc.

Summer Intern

May 2022 – Aug 2022 · 3 mos · Bengaluru, Karnataka, India · Hybrid

Designed a GC algorithm to clear 80% of blocked data in a key DB table, massively boosting cloud backup system performance.

University of düsseldorf

Summer Research Intern

May 2021 – Aug 2021 · 3 mos · Düsseldorf, North Rhine-Westphalia, Germany

Published in Nature Communications for developing a BERT-based model in PyTorch to predict enzyme-substrate binding from high-dimensional enzyme sequence embeddings.

Natural Language Processing (NLP)Machine Learning