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Arjan Jorick Kraak

Arjan Jorick Kraak

AI Data Trainer & Annotator

Netherlands flagErmelo, Netherlands
$20.00/hrIntermediateInternal Proprietary ToolingOther

Key Skills

Software

Internal/Proprietary Tooling
Other

Top Subject Matter

Large Language Models (LLMs) and Natural Language Processing

Top Data Types

TextText
DocumentDocument

Top Task Types

RLHFRLHF
ClassificationClassification
Text GenerationText Generation
Question AnsweringQuestion Answering
Text SummarizationText Summarization

Freelancer Overview

AI Data Trainer & Annotator. Brings 2+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Internal and Proprietary Tooling. Education includes Master of Science, Vrije Universiteit Amsterdam (2025) and Bachelor of Science, Vrije Universiteit Amsterdam (2025). AI-training focus includes data types such as Text and labeling workflows including RLHF.

IntermediateEnglishDutch

Labeling Experience

AI Data Trainer & Annotator

TextRLHF
As an AI Data Trainer at Outlier.ai, I evaluate and improve model outputs for Large Language Models (LLMs) using Reinforcement Learning from Human Feedback. I ensure data quality through detailed assessments, model comparison, and iterative feedback, always adhering to strict safety, neutrality, and factual accuracy guidelines. My efforts focus on identifying edge cases and enhancing reliability in AI-generated responses. • Rank and compare LLM responses based on quality and instruction-following. • Analyze and annotate complex prompt-response pairs for continuous improvement. • Apply rigorous quality control measures to detect hallucinations, bias, and inaccuracies. • Provide detailed feedback to optimize model safety and correctness.

As an AI Data Trainer at Outlier.ai, I evaluate and improve model outputs for Large Language Models (LLMs) using Reinforcement Learning from Human Feedback. I ensure data quality through detailed assessments, model comparison, and iterative feedback, always adhering to strict safety, neutrality, and factual accuracy guidelines. My efforts focus on identifying edge cases and enhancing reliability in AI-generated responses. • Rank and compare LLM responses based on quality and instruction-following. • Analyze and annotate complex prompt-response pairs for continuous improvement. • Apply rigorous quality control measures to detect hallucinations, bias, and inaccuracies. • Provide detailed feedback to optimize model safety and correctness.

2025 - Present

Education

V

Vrije Universiteit Amsterdam

Bachelor of Science, Business Administration

Bachelor of Science
2022 - 2025
C

Christelijk College Groevenbeek

VWO (Pre-University Education), Economics and Society

VWO (Pre-University Education)
2016 - 2022

Work History

P

Picnic

Delivery Driver

Amsterdam
2022 - 2024
A

Albert Heijn

Store Shelf Stocker

Amsterdam
2019 - 2023