Available to hire
I am a passionate freelance Full Stack Data Scientist specializing in Generative AI, NLP, Large Language Models, and Computer Vision with extensive expertise including classical Machine Learning models. I handle all phases of Data Science solutions from research to implementation, ensuring business value. I enjoy participating in Kaggle competitions, frequently ranking in the top 100, and contributing to open source Data Science projects on GitHub.
Since 2023, I run my consultancy ‘LUMI ML Consulting’ where I provide expert consultancy and support in designing, developing, and implementing Data Science and AI solutions. I keep up to date with the latest academic advancements focusing on practical applications of AI in business across NLP, Computer Vision, and LLMs.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Language
English
Fluent
Dutch
Fluent
Work Experience
Freelance AI Consultant at Delphyr via LUMI ML Consulting
June 1, 2024 - PresentWorking full-time at Delphyr, a medical startup, I contribute as a freelance Data Scientist and AI Consultant on medical AI projects including the Delphyr M1 medical LLM. My responsibilities include data analysis, setting up medical LLM evaluations, creating medical datasets for pretraining and fine-tuning, managing MLOps with MLFlow, and handling multi-GPU computing and infrastructure using Azure Machine Learning, Google Vertex AI, Transformers, and PyTorch.
Freelance AI Consultant at Octrooicentrum Nederland via LUMI ML Consulting
June 1, 2025 - PresentPart-time freelance Data Scientist working on data analysis, designing and implementing Retrieval-Augmented Generation (RAG) and VectorDB solutions, and developing content creation solutions based on open source Large Language Models.
Freelance AI Consultant at ASR Pensioenen via LUMI ML Consulting
May 31, 2025 - August 18, 2025Part-time freelance Data Scientist focusing on chatbot evaluation. Activities included data analysis, evaluation of test user feedback reports, and improving chatbot code based on evaluation results.
Freelance AI Consultant at Confidential Startup in FinTech via LUMI ML Consulting
October 31, 2024 - August 18, 2025Full-time freelance Data Scientist advising and implementing specialist Generative AI LLM models. Tasks involved data analysis, generating custom and synthetic datasets, and pretraining and fine-tuning LLMs for text generation and classification using Transformers and PyTorch.
Freelance AI Consultant at Confidential Startup in FinTech via LUMI ML Consulting
February 29, 2024 - August 18, 2025Part-time freelance Data Scientist setting up a proof of concept financial chatbot using Retrieval-Augmented Generation (RAG), Vector Database, GPT-3.5, LangChain, and front-end implementation with Streamlit.
Freelance AI Consultant at Software Vrienden via LUMI ML Consulting
October 31, 2023 - August 18, 2025Part-time freelance Data Scientist for a recruitment startup focusing on machine learning migration. Tasks included migrating AWS Comprehend to an in-house machine learning environment and setting up a proof of concept with RAG and Qdrant VectorDB.
Freelance AI Consultant at LUMI ML Consulting
May 1, 2023 - PresentFounder and freelance AI Consultant providing consultancy, design, and implementation of Machine Learning and Generative AI solutions including Generative AI, LLMs, NLP, and Computer Vision. Started part-time in May 2023 and moved full-time from July 1, 2024.
Data Scientist at NWWI
June 30, 2024 - August 18, 2025Responsible for designing and implementing a message-based machine learning environment using Microsoft Azure, analyzing and developing NLP solutions with LLMs and OpenAI, training Computer Vision models for document recognition, and deploying MLOps pipelines. Developed Proof of Concepts for GPT-4 based valuation report analysis and supported stakeholders with AI solution design and analytics using SQL Server, PowerBI, Azure DataBricks, and PySpark.
Data Scientist at Ilionx (formerly Rubix)
March 31, 2022 - August 18, 2025Worked on AI operational research for PostNL automating manual system message mapping with NLP models and similarity components. Architected Azure Data Platform for SMT Shipping and designed ETL pipelines for Jumbo using Azure DataBricks and Azure Data Factory.
Data Scientist at RecruitRobin
August 31, 2020 - August 18, 2025Developed NLP-based recruitment automation applications using BERT, RoBERTa, and custom Tensorflow models for candidate-vacancy matching, skill and keyword extraction, model evaluation, fine-tuning, and backend Azure cloud deployment.
.NET / Python ML Developer at Rubicon
August 31, 2019 - August 18, 2025Worked on cloud-native AI and ML applications, including mobile AI backend services, machine learning models with ML.Net, and POCs for financial reporting with Rabobank using LightGBM, LSTM, CNN models, and clustering with sklearn.
Senior Software Engineer at Teleena
August 31, 2017 - August 18, 2025Developed web applications and services for mobile virtual network enabler clients using ASP.NET MVC/Core, WCF, and Azure cloud, managed service bus applications, provided 3rd line incident resolution, documentation, and led a near-shore developer team.
Software Engineer at ICT Automatisering
December 31, 2013 - August 18, 2025Developed and maintained web applications and services with ASP.NET MVC and WCF, implemented cloud solutions on Windows Azure, managed databases, resolved incidents, and handled version control and documentation.
ICT Consultant at Atos Origin
February 28, 2011 - August 18, 2025Participated in large projects including BizTalk migration and various data center migrations for clients such as De Lage Landen, UVIT, Interpolis, and Rabobank International.
Technical Consultant at Iquinox
January 31, 2008 - August 18, 2025Supported projects at Police Netherlands ISC-West and Hogeschool INHOLLAND through secondment agency.
Infrastructure Expert at PricewaterhouseCoopers NL
May 31, 2007 - August 18, 2025Designed and implemented office automation infrastructures in the Netherlands within the central IT department GTS-TI Systems.
Freelance AI Consultant at Delphyr via LUMI ML Consulting
June 1, 2024 - PresentWorked fulltime on medical AI applications focused on the Delphyr M1 medical Large Language Model (LLM). Responsibilities included data analysis, setting up medical LLM model evaluation, creating datasets for evaluation, pretraining and fine-tuning, managing MLOps with MLFlow, multi-GPU computing infrastructure, and LLM pretraining and fine-tuning using Azure Machine Learning and Google Vertex AI with Transformers and PyTorch.
Freelance AI Consultant at Octrooicentrum Nederland via LUMI ML Consulting
June 1, 2025 - PresentPart-time consultancy involving data analysis, design and implementation of Retrieval Augmented Generation (RAG) and Vector Database (VectorDB) solutions, and content creation solutions based on open source Large Language Models (LLMs).
Freelance AI Consultant at ASR Pensioenen via LUMI ML Consulting
May 31, 2025 - August 18, 2025Part-time role focused on evaluating an inhouse chatbot. Responsibilities included data analysis, evaluation of user test feedback reports, and chatbot code improvements based on evaluation findings.
Freelance AI Consultant at Confidential FinTech Startup via LUMI ML Consulting
October 31, 2024 - August 18, 2025Full-time consultancy providing advice and implementation of specialist generative AI Large Language Models. Activities included data analysis, generation of custom and synthetic datasets, LLM pretraining and fine-tuning for text generation and classification using Transformers and PyTorch.
Freelance AI Consultant at Confidential FinTech Startup via LUMI ML Consulting
February 29, 2024 - August 18, 2025Part-time consulting to develop a proof of concept for a financial chatbot. Implemented retrieval augmented generation (RAG) with VectorDB, chatbot setup using GPT-3.5 and LangChain, and front-end implementation with Streamlit.
Freelance AI Consultant at Software Vrienden via LUMI ML Consulting
October 31, 2023 - August 18, 2025Part-time role at recruitment startup involving migration from AWS Comprehend to an in-house Machine Learning environment. Set up proof of concept with RAG and Qdrant VectorDB.
Freelance AI Consultant at LUMI ML Consulting
May 1, 2023 - PresentFounder of freelance consultancy offering design and implementation of Machine Learning and Generative AI solutions including LLMs, NLP, and Computer Vision. Initially part-time since May 2023, transitioned to full-time from July 1, 2024.
Data Scientist at NWWI
June 30, 2024 - August 18, 2025Designed, developed, and implemented a message-based Machine Learning environment on Microsoft Azure. Worked on NLP solutions using LLMs and OpenAI, developed Computer Vision models for document recognition, conducted PoCs with Azure OpenAI GPT-4 for valuation report analysis, deployed and monitored models in production using MLOps, and coordinated with business stakeholders on AI solutions.
Data Scientist at Ilionx (formerly Rubix)
March 31, 2022 - August 18, 2025Worked on various client projects including PostNL (AI for message mapping automation using NLP and ensemble models), SMT Shipping (Azure Data Platform architecture and implementation), and Jumbo (Azure DataBricks solutions). Responsibilities included data wrangling, model design and training, cloud architecture, Azure ecosystem management, and ETL pipeline development.
Data Scientist at RecruitRobin
August 31, 2020 - August 18, 2025Developed Natural Language Processing applications for automating recruitment workflows. Created custom TensorFlow models using BERT, RoBERTa, for candidate-vacancy matching, entity extraction, model evaluation and explainability, fine-tuning, and designed Azure cloud environment for AI services.
.NET / Python ML Developer at Rubicon
August 31, 2019 - August 18, 2025Developed cloud-native AI and ML applications in Azure and AWS using Python and .NET. Worked on internal projects including mobile AI apps, ML for sales data categorization, ML.Net models, and trained colleagues by setting up internal ML courses. For Rabobank, implemented ML PoCs for mortgage and savings data classification and time series prediction models.
Senior Software Engineer at Teleena
September 30, 2017 - August 18, 2025Developed and maintained web applications and services using ASP.NET MVC/Core and WCF. Implemented cloud-based applications in Windows Azure and service bus applications with NServiceBus. Led near-shoring team of developers and created design documentation.
Software Engineer at ICT Automatisering
December 31, 2013 - August 18, 2025Worked on customer teams to develop and maintain web applications and services using ASP.NET MVC, WCF, and Azure cloud. Managed databases using SQL Server tools, incident resolution, version control, and documentation.
ICT Consultant at Atos Origin
February 28, 2011 - August 18, 2025Conducted several large projects including BizTalk migration and data center migrations for major clients such as De Lage Landen, UVIT, Interpolis, and Rabobank International.
Technical Consultant at Iquinox
January 31, 2008 - August 18, 2025Performed technical consultancy projects at Police Netherlands ISC-West and Hogeschool INHOLLAND.
Infrastructure Expert at PricewaterhouseCoopers
May 31, 2007 - August 18, 2025Worked within PwC's central IT department on office automation infrastructure design and implementation in the Netherlands.
Freelance AI Consultant at Delphyr via LUMI ML Consulting
June 1, 2024 - PresentWorked on medical AI applications including the Delphyr M1 medical LLM model. Activities included data analysis, setting up medical LLM model evaluation, dataset creation for evaluation, pretraining and fine-tuning, MLOps with MLFlow, multi-GPU computing and infrastructure, and model training using Azure Machine Learning, Google Vertex AI, Transformers, and PyTorch.
Freelance AI Consultant (Parttime) at Octrooicentrum Nederland via LUMI ML Consulting
June 1, 2025 - PresentWorked as a part-time freelance Data Scientist. Activities included data analysis, design and implementation of Retrieval-Augmented Generation (RAG) and VectorDB, and developing solutions for content creation based on open source LLMs.
Freelance AI Consultant (Parttime) at ASR Pensioenen via LUMI ML Consulting
May 31, 2025 - August 18, 2025Worked on inhouse chatbot evaluation including data analysis, evaluation of test user feedback reports, and improvements of chatbot code based on evaluation results.
Freelance AI Consultant (Fulltime) at Confidential FinTech startup via LUMI ML Consulting
October 31, 2024 - August 18, 2025Provided advice and implementation of specialist GenAI LLM models including data analysis, generation of custom and synthetic datasets, and pretraining and fine-tuning LLMs for text generation and classification using Transformers and PyTorch.
Freelance AI Consultant (Parttime) at Confidential FinTech startup via LUMI ML Consulting
February 29, 2024 - August 18, 2025Set up a proof of concept (PoC) of a financial chatbot including RAG + VectorDB implementation, chatbot setup with GPT-3.5 and LangChain, and front-end implementation with Streamlit.
Freelance AI Consultant (Parttime) at Software Vrienden via LUMI ML Consulting
October 31, 2023 - August 18, 2025Worked on a Machine Learning migration at a recruitment startup. Activities included migration from AWS Comprehend to in-house ML environment and proof of concept setup with RAG and Qdrant VectorDB.
Freelance AI Consultant at LUMI ML Consulting
May 1, 2023 - PresentProviding freelance consultancy, design, and implementation of Machine Learning and Generative AI solutions specializing in generative AI, LLMs, NLP, and Computer Vision since May 2023 initially part-time, moving to full-time from July 1, 2024.
Data Scientist at NWWI
June 30, 2024 - August 18, 2025Responsible for design, development and implementation of a message-based Machine Learning environment on Microsoft Azure. Developed NLP solutions with LLMs like OpenAI, designed and trained Computer Vision models for document recognition, implemented PoCs analyzing valuation reports with GPT-4 using prompt engineering. Managed MLOps, information extraction methods, data analytics and stakeholder coordination.
Data Scientist at Ilionx (formerly Rubix)
March 31, 2022 - August 18, 2025Worked on AI Operational Research for PostNL automating system message mappings with NLP models and similarity measures. Designed and implemented Azure Data Platforms for SMT Shipping and data engineering solutions for Jumbo using Azure DataBricks and ADF pipelines.
Data Scientist at RecruitRobin
August 31, 2020 - August 18, 2025Developed NLP applications and machine learning models based on BERT, RoBERTa and custom TensorFlow models for recruitment automation including semantic similarity, skill and keyword extraction, model evaluation and Azure cloud environment design.
.NET / Python ML Developer at Rubicon
August 31, 2019 - August 18, 2025Developed cloud-native AI and ML applications focusing on backend using Python and .NET. Worked on mobile AI apps, ML model collections for sales information, ML.Net projects and internal ML courses. Also worked as an ML engineer at Rabobank developing models including LightGBM for mortgages, LSTM/CNN models for time series, clustering and data cleaning pipelines.
Senior Software Engineer at Teleena
September 30, 2017 - August 18, 2025Developed web applications and services in ASP.NET MVC and Core, WCF, Azure cloud services, and service bus applications with NServiceBus. Maintained software, solved incidents, managed Team Foundation Server and led near-shore development team.
Software Engineer at ICT Automatisering
December 31, 2013 - August 18, 2025Developed and maintained web applications and services using C#, ASP.NET MVC, WCF, Azure cloud, as well as SQL Server databases. Handled incident resolution, version management, and documentation.
ICT Consultant at Atos Origin
February 28, 2011 - August 18, 2025Performed large projects including BizTalk migration and data center migrations for clients such as De Lage Landen, UVIT, Interpolis and Rabobank International.
Technical Consultant at Iquinox
January 31, 2008 - August 18, 2025Performed projects at Police Netherlands ISC-West and Hogeschool INHOLLAND through a secondment agency.
Infrastructure Expert at PricewaterhouseCoopers
May 31, 2007 - August 18, 2025Worked within the internal central IT department designing and implementing office automation infrastructure in the Netherlands.
Education
Master of Science at University of Colorado Boulder
January 1, 2021 - February 1, 2026Completed 26 out of 30 Modules.
Bachelor ICT at Hogeschool NOVI
January 11, 2005 - December 22, 2006Qualifications
Master of Science in Data Science - University of Colorado Boulder (26 out of 30 modules completed)
January 1, 2021 - February 1, 2026Microsoft Certified: Azure Data Scientist Associate
January 1, 2024 - August 18, 2025Microsoft Azure AI Fundamentals
January 1, 2023 - August 18, 2025Coursera Introduction to Robotics with Webots
July 1, 2025 - August 18, 2025Coursera Introduction to Generative AI
February 1, 2024 - August 18, 2025Coursera Generative AI with Large Language Models
January 1, 2024 - August 18, 2025Coursera Text Marketing Analytics Specialization
December 1, 2023 - August 18, 2025Coursera Machine Learning: Theory and Hands-on Practice with Python Specialization
March 1, 2023 - August 18, 2025Coursera Vital Skills for Data Science Specialization
October 1, 2022 - August 18, 2025Coursera Data Mining Foundations and Practice Specialization
August 1, 2022 - August 18, 2025Coursera Data Science Foundations – Data Structures and Algorithms
October 1, 2021 - August 18, 2025Coursera Tensorflow in Practice Specialization
September 1, 2020 - August 18, 2025Coursera Mathematics for Machine Learning Specialization
April 1, 2020 - August 18, 2025Coursera Deep Learning Specialization
January 1, 2020 - August 18, 2025Microsoft Professional Program – Artificial Intelligence
January 1, 2019 - August 18, 2025Coursera Machine Learning Specialization
June 1, 2018 - August 18, 2025Coursera Neural Networks for Machine Learning by University of Toronto
November 1, 2017 - August 18, 2025Coursera Machine Learning van Stanford University
July 1, 2017 - August 18, 2025Microsoft Certified: MCSD App Builder
January 1, 2018 - August 18, 2025Microsoft Certified: MCSA Web Applications
January 1, 2018 - August 18, 2025Microsoft Certified: MCSD Windows Store Apps using C#
January 1, 2015 - August 18, 2025Microsoft Certified: MCPD Web Developer 4
January 1, 2012 - August 18, 2025MCTS BizTalk Server 2006
January 1, 2010 - August 18, 2025Microsoft Certified IT Professional Enterprise Administrator
January 1, 2008 - August 18, 2025Bachelor ICT
January 11, 2030 - August 18, 2025Microsoft Certified: Azure Data Scientist Associate
January 1, 2024 - August 18, 2025Microsoft Azure AI Fundamentals
January 1, 2023 - August 18, 2025Coursera Certificate: Introduction to Robotics with Webots
July 1, 2025 - August 18, 2025Coursera Certificate: Introduction to Generative AI
February 1, 2024 - August 18, 2025Coursera Certificate: Generative AI with Large Language Models
January 1, 2024 - August 18, 2025Coursera Certificate: Text Marketing Analytics Specialization
December 1, 2023 - August 18, 2025Coursera Certificate: Machine Learning - Theory and Hands-on Practice with Python Specialization
March 1, 2023 - August 18, 2025Coursera Certificate: Vital Skills for Data Science Specialization
October 1, 2022 - August 18, 2025Coursera Certificate: Data Mining Foundations and Practice Specialization
August 1, 2022 - August 18, 2025Coursera Certificate: Data Science Foundations – Data Structures and Algorithms
October 1, 2021 - August 18, 2025Coursera Certificate: Tensorflow in Practice Specialization
September 1, 2020 - August 18, 2025Coursera Certificate: Mathematics for Machine Learning Specialization
April 1, 2020 - August 18, 2025Coursera Certificate: Deep Learning Specialization
January 1, 2020 - August 18, 2025Microsoft Professional Program – Artificial Intelligence
January 1, 2019 - August 18, 2025Coursera Certificate: Machine Learning Specialization
June 1, 2018 - August 18, 2025Coursera Certificate: Neural Networks for Machine Learning
November 1, 2017 - August 18, 2025Coursera Certificate: Machine Learning by Stanford University
July 1, 2017 - August 18, 2025Microsoft MCSD App Builder
January 1, 2018 - August 18, 2025Microsoft MCSA Web Applications
January 1, 2018 - August 18, 2025Microsoft MCSD Windows Store Apps using C#
January 1, 2015 - August 18, 2025Microsoft MCPD Web Developer 4
January 1, 2012 - August 18, 2025MCTS Biztalk Server 2006
January 1, 2010 - August 18, 2025Microsoft Certified IT Professional Enterprise Administrator
January 1, 2008 - August 18, 2025Bachelor ICT
January 11, 2030 - December 22, 2006Microsoft Certified: Azure Data Scientist Associate
January 1, 2024 - August 18, 2025Microsoft Azure AI Fundamentals
January 1, 2023 - August 18, 2025Coursera: Introduction to Robotics with Webots
July 1, 2025 - August 18, 2025Coursera: Introduction to Generative AI
February 1, 2024 - August 18, 2025Coursera: Generative AI with Large Language Models
January 1, 2024 - August 18, 2025Coursera: Text Marketing Analytics Specialization
December 1, 2023 - August 18, 2025Coursera: Machine Learning: Theory and Hands-on Practice with Python Specialization
March 1, 2023 - August 18, 2025Coursera: Vital Skills for Data Science Specialization
October 1, 2022 - August 18, 2025Coursera: Data Mining Foundations and Practice Specialization
August 1, 2022 - August 18, 2025Coursera: Data Science Foundations – Data Structures and Algorithms
October 1, 2021 - August 18, 2025Coursera: Tensorflow in Practice Specialization
September 1, 2020 - August 18, 2025Coursera: Mathematics for Machine Learning Specialization
April 1, 2020 - August 18, 2025Coursera: Deep Learning Specialization
January 1, 2020 - August 18, 2025Microsoft Professional Program – Artificial Intelligence
January 1, 2019 - August 18, 2025Coursera: Machine Learning Specialization
June 1, 2018 - August 18, 2025Coursera: Neural Networks for Machine Learning
November 1, 2017 - August 18, 2025Coursera: Machine Learning (Stanford University)
July 1, 2017 - August 18, 2025Microsoft MCSD App Builder
January 1, 2018 - August 18, 2025Microsoft MCSA Web Applications
January 1, 2018 - August 18, 2025Microsoft MCSD Windows Store Apps using C#
January 1, 2015 - August 18, 2025Microsoft MCPD Web Developer 4
January 1, 2012 - August 18, 2025MCTS BizTalk Server 2006
January 1, 2010 - August 18, 2025Microsoft Certified IT Professional Enterprise Administrator
January 1, 2008 - August 18, 2025Industry Experience
Healthcare, Financial Services, Software & Internet, Telecommunications, Professional Services, Transportation & Logistics, Retail, Government, Manufacturing
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
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