Sandhilyan S.
Mid-Level AI Data Specialist
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Sandhilyan S. is an experienced AI Data Specialist with a comprehensive background in complex AI Operations. Based in Krishnagiri, Tamil Nadu, he specializes in the meticulous evaluation of Large Language Models (LLMs) and supports Speech AI, Computer Vision, and Search Quality initiatives. Sandhilyan has worked extensively across renowned global platforms such as DataAnnotation.tech and CrowdGen, where his role encompasses crucial tasks like data annotation, reinforcement learning from human feedback, prompt evaluation, transcription, and linguistic analysis. His pivotal projects include the precise evaluation and benchmarking of AI responses generated by technologies like ChatGPT and Gemini, strictly adhering to detailed guidelines for factual accuracy and quality assurance. Furthermore, Sandhilyan has applied his expertise to multilingual AI data operations, including Ads Integrity, content moderation, and speech recognition, constantly ensuring dataset quality and compliance across a spectrum of AI-driven ventures.
Experience
AI Video Annotator (Project Skyline & LiDAR)
Remotasks · 2025 — 2026Delivered annotations for video datasets within Project Skyline and managed LiDAR data, contributing to spatial AI projects. Followed established quality assurance guidelines to ensure accuracy across dynamic video sequences.Tamil Transcription Specialist
Andovar · 2026 — PresentProduced verbatim transcription datasets for Tamil audio, adhering to strict conventions regarding speaker tagging and non-speech event annotation. Captured spoken content while ensuring fidelity to linguistic standards and formatting guidelines.QA & Language Contributor
Highbrow Technology Inc. · 2025 — 2026Contributed quality assurance and language support to multilingual AI datasets. Validated annotations for semantic accuracy and linguistic consistency, while adhering to project-specific standards to ensure high-quality outputs.AI Data Annotator & Prompt Evaluator
DataAnnotation.tech · 2025 — PresentConducted evaluations and benchmarking of responses generated by ChatGPT and Gemini, focusing on reasoning quality, factual accuracy, and overall response quality. Engaged in structured AI response preference ranking to facilitate LLM evaluation and RLHF workflows. Identified and documented inconsistencies, formatting issues, and instruction-following performance. Compared outputs from Google AI Mode and ChatGPT against established criteria for answer quality and user experience.AI Data Specialist
CrowdGen · 2025 — PresentParticipated in various projects focusing on Ads Integrity, speech data collection, and dataset validation. Performed tasks related to prompt evaluation, data labeling, and quality assurance in accordance with project standards. Engaged in linguistic analysis and supported AI response ranking through human feedback mechanisms. Created and validated datasets for Indian English, utilizing complex evaluation rubrics to ensure data integrity.
Skills & Expertise
Education
- MBBS Coursework (Completed Year 1 & Year 2)Privolzhsky Research Medical University (PRMU) · 2023 — 2025
- Pre-University Course (PCMB)St. Francis Sales PU College · 2020 — Present
- Secondary School Leaving Certificate (SSLC)St. Paul's Matric High School, Mallapadi · 2018 — Present
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