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Daan Van HoltenDV

Daan Van Holten

Machine learning Specialist

€250/day
Amsterdam, NL
0-2 years

Average response time: 1 hour

About Daan

Freelance Data Scientist | ML Engineer | Web3 & Climate Tech Specialist

Hi, I’m Daan, a freelance data & machine learning specialist with a Master’s in Data Science & Advanced Business Analytics. I combine technical depth with business understanding to help turn data into real-world insights.

What I bring to the table:
- A sharp focus on practical and results driven data solutions.
- Cross domain experience in machine learning, blockchain, data analytics.
- Strong communication and stakeholder alignment, I speak both tech and business.

I specialize in
- Data Science
- Data Analytics.
- NoSQL (NEO4J, MongoDB)
- Machine Learning (both supervised and unsupervised — e.g., forecasting, classification, time series, clustering).
- NLP & Sentiment Analysis (e.g., market signals, social media trends).
- Blockchain, Web3 Analytics, and Tokenomics.
- Strategic Data Insights for business decision-making.

Some examples of projects I’ve worked on include:
- Sales forecasting for Siemens Germany (e.g., predicting revenue, analyzing market behavior).
- Customer segmentation for an hotel chain in Lisbon (e.g., clustering clientele to uncover actionable insights, customer segmentation).
- Optimization models (e.g., Knapsack problem, Traveling Salesman Problem, genetic algorithms).
- Recommendation system for a supermarket chain (e.g., smart basket, forget basket — combining data mining and ML).
- LLM-powered chatbot for an insurance company (e.g., Azure APIs, prompt engineering, large language model integration)



Let’s connect! Whether you need sharp insights, a working prototype, or just want to explore if there's a match.



  • English

    Native or bilingual

  • Dutch

    Native or bilingual

  • French

    Basic

  • German

    Basic

Can work on-site
Amsterdam (up to 50km)

Experience

  • Siemens Energy
    Sales forecast
    DIGITAL AND IT
    January 2025 - February 2025 (1 month)
    Berlin, Germany
    In response to the growing complexity of the global smart infrastructure market, Siemens’ Smart Infrastructure division in Germany launched an initiative to modernize monthly sales forecasting through data-driven methods. With our team of 3, our goal was to replace manual, error-prone processes with an interpretable, machine learning-based solution that improves accuracy, reliability, and business agility. The forecasting system leverages historical sales data and macroeconomic indicators.
    Our final solution consolidates fragmented data sources, reduces manual workload, and eliminates subjective judgment.
  • Jeronimo martins
    Recheio
    DIGITAL AND IT
    April 2025 - April 2025
    Lisbon, Portugal
    With a small team of three we build an recommendation system. In order to provide pertinent recommendations based on real purchasing behavior, we created a recommendation system that leverages customer profiles, transaction history, and product metadata.



  • Fidelidade
    LLM Chatbot Dev
    DIGITAL AND IT
    May 2025 - May 2025
    Lisbon, Portugal

    With a small team of three we developed an AI-powered assistant to support insurance agents in explaining complex financial products, improving client financial literacy, and increasing sales efficiency. We ended up building two versions.
    1. Prototype a high-performing Custom GPT with a strong UX 2. Develop a second solution using API-accessible tools, allowing full system integration.


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Education

  • Master in Data Science and Advanced Analytics
    NOVA IMS (Information Management School)
    2025
    Master in Data Science and Advanced Analytics
  • Bachelor Business Administration
    Erasmus University Rotterdam (RSM)
    2024
    Bachelor Business Administration

Skill set

Categories