AI Data Trainer and LLM Quality Analyst with 1.5 years of experience in data annotation, model evaluation, computer vision labeling, and large language model fine-tuning. Worked on RLHF workflows, personalization evaluation, SxS comparisons, grounding analysis, and hallucination detection across multiple global AI programs. Skilled in prompt engineering, content labeling and moderation, structured feedback/rationales, and quality assurance to improve AI system accuracy, safety, and reliability. Experienced in delivering consistent, guideline-compliant datasets and validating response quality for safer, more helpful model outputs.

Hardik Singh Sengar

AI Data Trainer and LLM Quality Analyst with 1.5 years of experience in data annotation, model evaluation, computer vision labeling, and large language model fine-tuning. Worked on RLHF workflows, personalization evaluation, SxS comparisons, grounding analysis, and hallucination detection across multiple global AI programs. Skilled in prompt engineering, content labeling and moderation, structured feedback/rationales, and quality assurance to improve AI system accuracy, safety, and reliability. Experienced in delivering consistent, guideline-compliant datasets and validating response quality for safer, more helpful model outputs.

Available to hire

AI Data Trainer and LLM Quality Analyst with 1.5 years of experience in data annotation, model evaluation, computer vision labeling, and large language model fine-tuning. Worked on RLHF workflows, personalization evaluation, SxS comparisons, grounding analysis, and hallucination detection across multiple global AI programs.

Skilled in prompt engineering, content labeling and moderation, structured feedback/rationales, and quality assurance to improve AI system accuracy, safety, and reliability. Experienced in delivering consistent, guideline-compliant datasets and validating response quality for safer, more helpful model outputs.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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Language

Hindi
Fluent
English
Advanced

Work Experience

Computer Vision Data Annotator at Cntxt.ai
June 1, 2026 - Present
Annotated and labeled images and video frames for computer vision model training using bounding boxes, polygons, and semantic segmentation masks. Performed quality checks and review passes to ensure accuracy and guideline consistency. Identified edge cases such as occlusions and ambiguous objects, and flagged them with detailed notes to refine labeling taxonomies and improve training data quality. Collaborated with ML engineers to improve annotation guidelines and reduce labeling errors.
Analyst – AI/LLM Practice at Innodata India Pvt Ltd
January 1, 2026 - June 30, 2026
Conducted advanced LLM evaluation and response quality analysis across multiple AI workflows. Supported RLHF pipelines including SxS evaluation, grounding analysis, and hallucination detection. Designed and refined prompts for multi-turn interactions to improve accuracy and reliability. Provided structured feedback and annotations to enhance model performance, safety, and compliance.
Computer & Information Systems Specialist – AI Trainer at Invisible Technologies
July 1, 2025 - Present
Train and fine-tune large language models by providing high-quality data annotations, feedback, and evaluations to enhance model accuracy and performance. Analyze AI outputs to identify edge cases, biases, hallucinations, and personalization errors. Conduct Side-by-Side (SxS) evaluations and grounding analysis to improve response integration and helpfulness. Generate structured rationales and detailed quality reports to strengthen model reliability and safety compliance.
AI Data Annotator at Appen AI
March 1, 2025 - June 1, 2025
Labeled and categorized text, audio, and search relevance datasets for supervised AI model training. Performed intent classification and search quality evaluation tasks. Maintained high annotation accuracy while meeting productivity benchmarks. Provided feedback to improve annotation guidelines and data consistency.
Data Annotator at TELUS International
December 1, 2024 - February 1, 2025
Annotated and validated datasets to support machine learning development pipelines. Evaluated AI-generated responses for safety, compliance, and quality standards. Conducted quality assurance checks to reduce model error rates. Worked in a global remote team environment with strict data handling standards.

Education

Bachelor of Engineering in Computer Science at Chandigarh University
August 1, 2021 - June 1, 2025
Higher Secondary Certificate (PCM) at Adarsh Vidya Mandir
April 1, 2020 - March 1, 2021
Bachelor of Engineering in Computer Science at Chandigarh University Mohali, Punjab
August 1, 2021 - June 1, 2025
Higher Secondary Certificate (PCM) at Adarsh Vidya Mandir
April 1, 2020 - March 31, 2021
Bachelor of Engineering in Computer Science at Chandigarh University, Mohali, Punjab
August 1, 2021 - June 1, 2025
Higher Secondary Certificate (PCM) at Adarsh Vidya Mandir, Unnao, Uttar Pradesh
April 1, 2020 - March 1, 2021
B.E. in Computer Science (CGPA: 7.29/10) at Chandigarh University, Mohali, Punjab
August 1, 2021 - June 30, 2025
Higher Secondary Certificate (PCM) | 68% at Adarsh Vidya Mandir, Unnao, Uttar Pradesh
April 1, 2020 - March 31, 2021

Qualifications

Developing AI Applications with Python and Flask
January 11, 2030 - March 8, 2026
Introduction to Computer Vision and Image Processing
January 11, 2030 - March 8, 2026
Introduction to Cloud Computing
January 11, 2030 - March 8, 2026
Applications of Geospatial Technology (IIRS-ISRO Dehradun)
January 11, 2030 - March 8, 2026
Developing AI Applications with Python and Flask
January 11, 2030 - March 8, 2026
Introduction to Computer Vision and Image Processing
January 11, 2030 - March 8, 2026
Introduction to Cloud Computing
January 11, 2030 - March 8, 2026
Applications of Geospatial Technology (IIRS-ISRO Dehradun)
January 11, 2030 - March 8, 2026
Developing AI Applications with Python and Flask
January 11, 2030 - March 8, 2026
Introduction to Computer Vision and Image Processing
January 11, 2030 - March 8, 2026
Introduction to Cloud Computing
January 11, 2030 - March 8, 2026
Applications of Geospatial Technology (IIRS-ISRO Dehradun)
January 11, 2030 - March 8, 2026
Developing AI Applications with Python and Flask
January 11, 2030 - August 21, 2026
Introduction to Computer Vision and Image Processing
January 11, 2030 - August 21, 2026
Introduction to Cloud Computing
January 11, 2030 - August 21, 2026
Applications of Geospatial Technology (IIRS - ISRO Dehradun)
January 11, 2030 - August 21, 2026

Industry Experience

Software & Internet, Professional Services, Media & Entertainment, Computers & Electronics, Education, Telecommunications