Daan H.

Key Skills

Software

Other

Appen

AWS SageMaker

Data Annotation Tech

Google Cloud Vertex AI

LabelImg

OneForma

Toloka

Top Subject Matter

Business analytics / supply chain operations

Enterprise data strategy and operations

Data science and model evaluation

Top Data Types

Text

Image

Audio

Top Task Types

Classification

Data Collection

Prompt + Response Writing (SFT)

Segmentation

Bounding Box

Question Answering

Transcription

Object Detection

Polyline

RLHF

Point/Key Point

Polygon

Entity (NER) Classification

Cuboid

Evaluation/Rating

Freelancer Overview

Data Lead. Brings 8+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other, Internal, and Proprietary Tooling. Education includes Master of Science in Data Science, University of Amsterdam (2025) and Master of Science Business Administration, VU University (2019). AI-training focus includes data types such as Data Collection, Computer Code, and Programming and labeling workflows including Classification, Data Collection, and Evaluation.

Labeling Experience

Data Lead, KLM (01/2025 - Present)

OtherData Collection

As a Data Lead, coordinated data initiatives to ensure datasets are prepared for analytics and AI use cases. Directed team efforts around data availability, quality, and operational readiness. Supported governance and delivery of structured data assets used by downstream modeling. • Led coordination of data readiness and quality work • Managed data-related priorities and delivery • Ensured consistent dataset preparation for AI/analytics consumption • Oversaw team execution of data operations

2025 - Present

AI Engineer, HUMBLETURTLE.AI (01/2025 - Present)

TextPrompt + Response Writing (SFT)

As an AI Engineer, contributed to building and maintaining AI agentic systems that require curated training/evaluation interactions. Developed prompts and maintained system behavior through iterative tuning and testing. Ensured outputs align with intended task requirements and quality standards. • Authored and refined prompt templates for AI agents • Maintained and tested prompt-driven behaviors • Supported creation/curation of prompt-response pairs for training/evaluation • Monitored output quality and iterated on system responses

2025 - Present

Data Scientist, KLM (03/2024 - Present)

Other

Worked as a Data Scientist on AI/data-driven initiatives where labeling or dataset quality processes are typically required to validate model performance. Applied analytical and modeling skills to support evaluation workflows and iterative improvements. Collaborated with stakeholders to ensure datasets and results met expected performance criteria. • Supported dataset evaluation and model validation cycles • Performed data analysis to improve reliability of AI outputs • Iterated on features/inputs for better performance • Coordinated with teams on quality expectations for AI results

2024 - Present

Head of Data, BUYBAY B.V (02/2022 - 03/2024)

Data Collection

Led the data function, coordinating team efforts to collect, prepare, and structure data for analytics and AI applications. Drove a data strategy and roadmap to improve data availability and quality across the organization. Supervised data engineering and analytics initiatives that supported model development and evaluation. • Managed data pipelines and ensured usable datasets • Coordinated data collection and preparation activities • Set data roadmap and quality goals for teams • Oversaw analytics work feeding downstream AI/data initiatives

2022 - 2024

Business Analyst, BUYBAY B.V (09/2019 - 09/2020)

OtherClassification

Contributed to data/insight work in a business analytics capacity, supporting data preparation for downstream analysis and decision-making. Focused on organizing datasets and translating business questions into usable data structures for stakeholders. Helped ensure data quality and consistency for reporting and analysis. • Supported data collection and structuring for business use cases • Worked with requirements gathering to shape analytics-ready data • Assisted with data quality checks and preparation • Enabled reporting and analysis through clean data delivery

2019 - 2020

Education

Work History