Sebastian Panman de Wit

Director of AI | Freelance Data Scientist

Implementing end-to-end (Generative) AI solutions with LLMs, Computer Vision, NLP etc

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Top 1% freelancer
on Upwork

NVIDIA GTC 2024

Senior AI Specialist | NexGen

As a Senior AI Specialist at NexGen Cloud, I had the privilege of presenting our work on Large Language Models (LLMs) and GPU optimization at one of the world's largest AI conferences.

Fine-tune LLMs tutorial

Freelance Data Scientist

Wrote a comprehensive tutorial on Medium about fine-tuning an LLM (Llama 3.1 8B), from data generation to hosting a chatbot online.

Large Language Models

Freelance Data Scientist

Deployed open-source Large Language Models on AWS Sagemaker and improved outputs with Retrieval Augmented Generation (RAG) techniques.

Common LLM mistakes

Freelance Data Scientist

Wrote a Medium article on common mistakes in local LLM deployment with specific solutions and examples using Ollama

LLM Inference Toolkit

Senior AI Specialist | NexGen

Developed an open-source LLM Inference Toolkit designed to kick-start your LLM projects in the cloud.

GPU Selector for LLMs

Senior AI Specialist | NexGen

Developed a handy tool to quickly calculate the GPU memory requirements for LLM use cases (e.g. inference, finetuning).

Gen AI & Recruitment

Freelance Data Scientist

Developed a Generative AI & Process Mining solution that automates recruitment tasks using advanced models like Large Language Models.

AI Competitive Pricing

Senior Data Scientist | Valcon

Developed a competitive pricing solution using state-of-the-art AI techniques like transformer models and deep neural networks.

Cognitive Deforestation

Data Scientist | Deloitte

Contributed to a Cognitive Deforestation project predicting deforestation risks using contextual geographical data.

Serverless LLM

Freelance Data Scientist

Wrote a Medium article on quick and cheap deployment of open-source LLMs with serverless services on AWS.

Gen AI - Coding Game

Freelance Data Scientist

Created a web-based programming game using React and AWS, enhanced with ChatGPT-generated questions to challenge coding skills.

Gen AI - Streamlit

Freelance Data Scientist

Developed a tool for building ML and Data Science web apps, using OpenAI's ChatGPT to eliminate constant code copying between browser and IDE.

Academic publication

MSc Data Science & Business

Published a paper in ACM Digital Threats: Research and Practice (DTRAP) titled “Dynamic Detection of Mobile Malware Using Smartphone Data and Machine Learning”.

JBISA Thesis award

MSc Data Science & Business

Received the Joop Bautz Information Security Award 2018 for the best Cybersecurity master thesis in the Netherlands.

Sebastian is a great freelancer and was key to the success of this project

Sebastian was very knowledgable in Large Language Models / AI. He was extremely professional, quick [..] and his communication was very impressive. He’ll be our “go to” “LLM / AI guy” from now on.

[Sebastian] demonstrated professionalism, dedication, and put in significant effort to deliver quality work [and was] attentive to details and showed a strong understanding of the task at hand [..]

Great work! [Sebastian] solved a very difficult problem quickly and efficiently. Would hire again!