AI-Powered Solutions forModern Business

Building intelligent systems that transform data into actionable insights and turn raw data to valuable assets.

About

Jonas Haahr

"404 error bio not yet found (...) I mean I like Data Science, AI, building stuff, but I still need to work on expressing that eloquently."

In the meantime: I am a freshly graduated BI student. I built a portfolio to showcase my determination to apply my skills outside of the classroom too.

All projects showcased here are fully functional with interactive demos you can try right now.

5+
Active Projects
AI/ML
Core Focus
100%
Interactive Demos

Tech Stack

CategoryTechnologies
ProgrammingPython, R, SQL, JavaScript, HTML
Data Science & AI/MLscikit-learn, TensorFlow, Keras, XGBoost, Transformers, FinBERT, LangChain, RAG, QLoRA, GPT, MLOps
Data Engineering & VizDocker, Git, Power BI, Superset, R Shiny, Streamlit
Cloud & IntegrationGoogle Cloud Platform, Microsoft Azure, Power Automate, APIs, Web Scraping
DatabasesPostgreSQL, SQLite, ChromaDB, NoSQL, ER Modeling, Dimensional Modeling
Business AnalyticsForecasting, Time Series, Customer Analytics, Marketing Analytics, Strategic Analytics

Projects

Interactive demos and case studies showcasing AI/ML applications and data analytics

CurRag

Live Demo

RAG System for University Notes

A Retrieval-Augmented Generation (RAG) system for querying university lecture notes using LangChain, ChromaDB, and OpenAI. Features semantic search with natural language queries and a Streamlit web interface for exploring your notes.

PythonLangChainChromaDBOpenAI GPT-4StreamlitLCEL

💡 First visit may take 30-60s to wake up

View Project

CodePractice.AI

Live Demo

Interactive Coding Tutor

A mobile-first web app for practicing Python and SQL with AI-powered feedback and real code execution. Features 5 practice categories (Data Engineering, Analytics Engineering, Data Analysis, Data Science, Custom Topics), intelligent hints, and progress tracking with localStorage persistence.

ReactViteTailwind CSSPyodidesql.jsGemini 1.5

💡 Real code execution in browser

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AI News Digest

Case Study

Multi-Agent News Curation System

Advanced multi-agent system with RAG & ReACT that fetches, filters, and curates AI tech news. Features RAG-based deduplication, ReACT agents with tool use for quality scoring, LangSmith observability, and weekly themed execution (ML Monday, Business Briefing, Ethics Friday, Data Science Saturday).

PythonLangChainRAGReACTChromaDBLangSmithMulti-Agent

💡 Newsletter archive & methodology

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FinSight

In Development

Business Intelligence & ETL Architecture

End-to-end BI architecture with ETL pipeline to extract, prepare, visualize and analyze 10-40 thousand facts per SEC/ESEF filing. Features XBRL parsing with Arelle, normalization across US-GAAP/IFRS taxonomies, accounting identity validation, and PostgreSQL data warehouse. Interactive demo lets you analyze any publicly listed company.

PythonFlaskArellePostgreSQLNext.jsRechartsRailway

💡 Live ETL demo with quota system

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Novo Nordisk Analysis

Live Dashboard

Financial & Competitive Analysis

Strategic analysis of Novo Nordisk - Denmark's pharmaceutical leader and GLP-1 innovator. Features comprehensive financial metrics (profitability, liquidity, leverage, efficiency, growth), peer comparison with 5 competitors, and 5-year trend analysis with interactive visualizations.

PythonyfinanceApache SupersetPostgreSQLSQLiteData Viz

💡 Interactive financial dashboard

View Project

Get in Touch

Interested in working together? Let's talk about your project.

Contact Information

Feel free to reach out for project collaborations, consulting opportunities, or just to discuss AI/ML and data analytics.