Home - Carlo Lepelaars

Hi, nice to meet you! This is my personal website on which I explore Artificial Intelligence (AI), Mathematics, Music, Investing and Quantum Computing.

I'm currently working as a freelance AI engineer and data scientist. Feel free to reach out on [LinkedIn](https://www.linkedin.com/in/carlo-lepelaars/) or [X](https://x.com/carlolepelaars) if you are interested in working together.
I love reading and have compiled a list of my readings [here](/books).
I play drums, guitar and love [sim-racing](https://en.wikipedia.org/wiki/Sim_racing)!

Past Work

CrowdCent (2022-2025)

I worked for [CrowdCent](https://crowdcent.com) as a (founding) data scientist on financial machine learning (ML), large language models (LLMs) and MLOps. CrowdCent is a startup building investment strategies driven by AI trained on investment community data. CrowdCent is collaborating with investment community [SumZero](https://sumzero.com) on a fund and also runs a fund around the financial data science tournament [Numerai](https://numer.ai).

DeepNewz (2024)

Large Language Model (LLMs) workflows
- Prompt Engineering
- Automated News Story Writing
- Topic Classification
- Language Translation
Prediction Markets
- Prediction Market Generation
- Prediction Market Quality Scoring

VBTI (2020-2021)

Computer Vision for agriculture:

Rotational Estimation
Object Detection
Segmentation
Keypoint Detection

Weights & Biases (2020-2021)

Wrote technical blog posts for Weights & Biases on a freelance basis:

Open Source Projects

numerblox

scikit-learn components for [Numerai](https://numer.ai). I built NumerBlox while at CrowdCent. NumerBlox is used within CrowdCent as part of its Numerai infrastructure.

blackscholes

Black-Scholes (financial option pricing) calculator. A lightweight package to determine option prices with [extensive documentation](https://carlolepelaars.github.io/blackscholes/3.the_greeks_blackscholes) on the math behind the Black-Scholes model. I also built a [tool that uses this library](/tools/blackscholes) under the hood.

auditus

Simple Audio Embedding Toolkit

q4p

Quantum computing for (Python) Programmers. This course makes learning Quantum Computing accessible for software engineers and aims to simplify quantum computing to its essence. It is built in public and new entries are gradually added.

skq

Scientific toolkit for Quantum Computing. Used in the q4p course.

fh-plotly

[Plotly](https://plotly.com) to [FastHTML](https://www.fastht.ml) conversion plugin.

flocky

Simple SDK for the decentralized AI platform [Flock.io](https://www.flock.io/).

ghostnet_tf2

At the time one of the first implementations of the [GhostNet](https://arxiv.org/abs/1911.11907) CNN architecture for Tensorflow 2.0.

Open Source Contributions

scikit-lego

Extra blocks for scikit-learn pipelines. Contributions include building support for multi-output models, custom arguments and scikit-learn compatibility.

FastHTML-Gallery

A gallery of [FastHTML](https://fastht.ml) examples. I contributed a variety of examples, including [Visualizations](https://fastht.ml/gallery/split_view?category=visualizations&project=bloch_sphere), [Image Uploads](https://fastht.ml/gallery/split_view?category=dynamic_user_interface_%28htmx%29&project=multi_image_upload), [Text and button animations](https://fastht.ml/gallery/split_view?category=dynamic_user_interface_%28htmx%29&project=animations), [Dynamic table loading](https://fastht.ml/gallery/split_view?category=dynamic_user_interface_%28htmx%29&project=click_to_load), [Audio player](https://fastht.ml/gallery/split_view?category=widgets&project=audio) and [PDF viewer](https://fastht.ml/gallery/split_view?category=widgets&project=pdf).