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Stephane Painchaud

Stephane Painchaud

AI/LLM Data Labeling & RLHF Specialist Contractor

Canada flagSherbrooke, Canada
$55.00/hrExpertOther

Key Skills

Software

Other

Top Subject Matter

Physics Domain Expertise
AI Safety
LLM Evaluation

Top Data Types

Computer Code ProgrammingComputer Code Programming
DocumentDocument
TextText
VideoVideo

Top Task Types

Evaluation/RatingEvaluation/Rating
Question AnsweringQuestion Answering
RLHFRLHF
Text SummarizationText Summarization

Freelancer Overview

AI/LLM Data Labeling & RLHF Specialist Contractor. Brings 22+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Internal, Proprietary Tooling, and Other. Education includes Certificate in Data Analytics Lean Six Sigma, University of Amsterdam (2026) and Diploma in Administration, Laval University (2026). AI-training focus includes data types such as Text and Video and labeling workflows including RLHF, Text Extraction, and Text Summarization.

ExpertFrenchSpanishEnglish

Labeling Experience

arXiv Summarization & Document Labeling Specialist

TextText Summarization
Produced structured summaries of complex physics arXiv papers for LLM/AI training ingestion. Created concise, bullet-pointed document summaries to facilitate supervised fine-tuning and evaluation tasks. Ensured factual accuracy and conceptual clarity by fact-checking using authoritative physics sources. • Synthesized academic content into structured LLM training inputs • Ensured summary quality with rubric-based accuracy review • Collaborated with domain experts for knowledge curation • Generated document summaries for AI/ML R&D pipelines

Produced structured summaries of complex physics arXiv papers for LLM/AI training ingestion. Created concise, bullet-pointed document summaries to facilitate supervised fine-tuning and evaluation tasks. Ensured factual accuracy and conceptual clarity by fact-checking using authoritative physics sources. • Synthesized academic content into structured LLM training inputs • Ensured summary quality with rubric-based accuracy review • Collaborated with domain experts for knowledge curation • Generated document summaries for AI/ML R&D pipelines

2023 - 2026

AI/LLM Data Labeling & RLHF Specialist Contractor

TextRLHF
Conducted expert-level RLHF and rubric evaluation of large language models for physics reasoning and factuality assessments. Performed bilingual (EN/FR) annotation, rewriting, safety evaluation, prompt engineering, and structured fact-checking for AI/LLM labs as a specialist contractor. Designed adversarial tests and comprehensive rubric frameworks for AI knowledge validation. • Executed annotation and label review tasks across multiple AI research projects • Developed, applied, and audited scoring rubrics for LLM outputs • Led EN/FR data annotation and conceptual accuracy evaluations for AI training • Performed structured evaluation and adversarial prompting for engineering use cases

Conducted expert-level RLHF and rubric evaluation of large language models for physics reasoning and factuality assessments. Performed bilingual (EN/FR) annotation, rewriting, safety evaluation, prompt engineering, and structured fact-checking for AI/LLM labs as a specialist contractor. Designed adversarial tests and comprehensive rubric frameworks for AI knowledge validation. • Executed annotation and label review tasks across multiple AI research projects • Developed, applied, and audited scoring rubrics for LLM outputs • Led EN/FR data annotation and conceptual accuracy evaluations for AI training • Performed structured evaluation and adversarial prompting for engineering use cases

2022 - 2025

Consultant – Video OCR Data Labeling for AI Applications

OtherVideo
Developed an OCR tool in Python using Tesseract for video text extraction, automating video labeling in support of AI/ML applications. Labeled, extracted, and structured textual data from video sources for LLM ingestion pipelines. Applied data cleaning and post-processing for subsequent AI training. • Built Python-Tesseract OCR pipelines for automated text data collection • Labeled and verified extracted video transcript data for training use • Structured extracted information for prompt/response data sets • Enhanced multi-lingual video annotation processes for ML use cases

Developed an OCR tool in Python using Tesseract for video text extraction, automating video labeling in support of AI/ML applications. Labeled, extracted, and structured textual data from video sources for LLM ingestion pipelines. Applied data cleaning and post-processing for subsequent AI training. • Built Python-Tesseract OCR pipelines for automated text data collection • Labeled and verified extracted video transcript data for training use • Structured extracted information for prompt/response data sets • Enhanced multi-lingual video annotation processes for ML use cases

2021 - 2021

Education

H

HEC Montréal

Coursework in Communication, Business Communication

Coursework in Communication
2026 - 2026
T

TELUQ University

Coursework in Civil and Criminal Law, Law

Coursework in Civil and Criminal Law
2026 - 2026

Work History

X

Xian - Electrical Systems Inc.

CTO

Sherbrooke
2002 - Present
X

Xian - Electrical Systems Inc.

CTO

Sherbrooke
2002 - Present