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S
Sayan Das

Sayan Das

Expert in model training and AI data annotation on STEM field

India flagHowrah, India
$10.00/hrIntermediateTelusOther

Key Skills

Software

TelusTelus
Other

Top Subject Matter

No subject matter listed

Top Data Types

DocumentDocument
ImageImage
VideoVideo

Top Task Types

Action RecognitionAction Recognition
Audio RecordingAudio Recording
Evaluation/RatingEvaluation/Rating
Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)
RLHFRLHF

Freelancer Overview

I have extensive hands-on experience in AI model training, Reinforcement Learning from Human Feedback (RLHF), and data annotation through my work with Turing and TELUS Digital. As an LLM Trainer and Expert in Chemistry and Biology, he contributed to the development of advanced Generative AI models such as O3 and O4-mini, enhancing their domain accuracy and reasoning through RLHF-based optimization. My work involved evaluating and curating high-quality datasets, annotating domain-specific content, and ensuring alignment of model responses with human-like reasoning, particularly within the Microsoft-STEM project handled by Turing. At TELUS Digital, I deepened my expertise in STEM-focused data annotation, working across Multimango and Parimango platforms to ensure precision labeling, categorization, and quality control of complex scientific datasets. This experience allowed me to bridge my scientific background with AI training tasks, ensuring models learn contextually rich, factual, and pedagogically sound data representations. My dual background in food technology and biochemical engineering further enhances my ability to contribute to specialized AI domains, making me a valuable professional in the intersection of science, data, and machine learning.

IntermediateBengaliHindiEnglish

Labeling Experience

LLM Trainer and Expert: Chemistry and Biology

OtherDocumentRLHFFine Tuning
LLM Development expert in chemistry and Biology domain. Having work experience on Generative AI training and development of O3, O4-mini model. Successfully completed the project Microsoft-STEM with Turing.

LLM Development expert in chemistry and Biology domain. Having work experience on Generative AI training and development of O3, O4-mini model. Successfully completed the project Microsoft-STEM with Turing.

2025 - 2025
Telus

Data Annotator: STEM Field

TelusImageQuestion AnsweringAction Recognition
Worked on Multimango and Parimango platform of TELUS Digital. Annotate image, text, Video, Datasets, Documents in STEM field.

Worked on Multimango and Parimango platform of TELUS Digital. Annotate image, text, Video, Datasets, Documents in STEM field.

2025 - 2025

R&D Associate: Content and Teaching

OtherDocumentMappingFine Tuning
Creating a vast Knowledge library for the organization consisting of scientific ppts, Docs, and animation made by Prezi, Google docs and Canva in Chemistry, Biochemistry, Food technology and agriculture management. Data Annotation: Tagging of all the contents along with the indexes to the organization’s e-platforms: ELC, XamFIT, and AI for Learners.

Creating a vast Knowledge library for the organization consisting of scientific ppts, Docs, and animation made by Prezi, Google docs and Canva in Chemistry, Biochemistry, Food technology and agriculture management. Data Annotation: Tagging of all the contents along with the indexes to the organization’s e-platforms: ELC, XamFIT, and AI for Learners.

2022 - 2023

Education

J

Jadavpur University

Master of Technology, Food Technology and Biochemical Engineering

Master of Technology
2018 - 2020
J

Jadavpur University

M.Tech, Food Technology and Biochemical Engineering

M.Tech
2018 - 2020

Work History

N

Netaji Subhas Training Institute

Skill Faculty and Trainer

Kolkata
2024 - Present
J

Jadavpur University

Senior Research Fellow

Kolkata
2023 - Present