Chandan Kumar

Key Skills

Software

Toloka

Other

Top Subject Matter

General AI/Data Labeling

LLM Evaluation/NLP

Legal Services & Contract Review

Top Data Types

Image

Text

Document

Top Task Types

Classification

Freelancer Overview

Data Annotator & Search Engine Evaluator. Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Toloka and Other. Education includes Bachelor of Science, Vinoba Bhave University and Diploma, Institute of Computer Studies. AI-training focus includes data types such as Image and Text and labeling workflows including Classification, Evaluation, and Rating.

Labeling Experience

AI Response Rater & Reviewer

OtherTextPrompt Response Writing SFT

As an AI Response Rater & Reviewer for Outlier AI's Ather Project on the MultiMango Platform, I assessed AI-generated responses for accuracy, clarity, and relevance. My feedback directly helped refine and improve large language model behaviors. I also identified hallucinations and bias, ensuring strict compliance with project requirements. • Compared AI-generated text outputs for alignment with prompts. • Provided structured, constructive feedback to developers. • Detected and documented logical errors and model hallucinations. • Maintained a high standard of evaluation accuracy throughout.

As an AI Response Rater & Reviewer for Outlier AI's Ather Project on the MultiMango Platform, I assessed AI-generated responses for accuracy, clarity, and relevance. My feedback directly helped refine and improve large language model behaviors. I also identified hallucinations and bias, ensuring strict compliance with project requirements. • Compared AI-generated text outputs for alignment with prompts. • Provided structured, constructive feedback to developers. • Detected and documented logical errors and model hallucinations. • Maintained a high standard of evaluation accuracy throughout.

2025 - 2025

Data Annotator & Search Engine Evaluator

TolokaImageClassification

As a Data Annotator & Search Engine Evaluator at Toloka.AI, I annotated diverse datasets including images, text, audio, and video to enhance AI model performance. My responsibilities also included evaluating search results for user intent and supporting accurate judgments with web research. I ensured the quality and consistency of all data according to strict guidelines. • Labeled images, text, audio, and video for supervised machine learning. • Evaluated search result relevance and intent alignment. • Adhered to detailed annotation guidelines and performed quality checks. • Conducted online research to validate data interpretations.

As a Data Annotator & Search Engine Evaluator at Toloka.AI, I annotated diverse datasets including images, text, audio, and video to enhance AI model performance. My responsibilities also included evaluating search results for user intent and supporting accurate judgments with web research. I ensured the quality and consistency of all data according to strict guidelines. • Labeled images, text, audio, and video for supervised machine learning. • Evaluated search result relevance and intent alignment. • Adhered to detailed annotation guidelines and performed quality checks. • Conducted online research to validate data interpretations.

2023 - 2025

Education

Work History