Leonie Kreuser

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Recent projects:

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Since August 2025 - Implementation of AI use cases as part of a large AI strategy program for a bank - Role: Project Lead, Stream Lead, Data Scientist

• Activities: Comparison and selection of various EnterpriseGPT solutions (Langdock, meinGPT, Amazon Q Business), conduction of requirements workshops for AI use cases in the area of customer service, evaluation and prioritization of AI use cases

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Since August 2025 - Development of an LLM-based financial planning system for tax consulting - Role: Data Scientist

• Activities: Integration of LLMs in Python via Azure OpenAI, prompt engineering, integration of various data sources via REST API, preparation, post-processing, and visualization of results in an interactive web interface (Streamlit), monitoring and tracing of LLM interactions with Langfuse
• Technologies: Python, Langchain, Langfuse, Azure/AzureOpenAI, Azure DevOps, Streamlit, FastAPI

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Since January 2023 - Implementation of technical use cases on a data lake platform for procurement data - Role: Project Lead, Data Architect

• Activities: Translation of complex technical requirements into scalable data pipelines with SQL/dbt (including macros and tests), development of interactive Power BI reports, automation and orchestration of pipelines with Airflow/nifi, project management, recruiting and onboarding of new project members
• Technologies: SQL, dbt, AWS Lambda, AWS Redshift, Airflow, nifi, GitLab, Power BI

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June 2025 - Hackathon: Implementation of a Multi-Agent Voice-Bot to assist with a construction engineering tool (winner of the technology award) - Role: Data Scientist

• Activities: Implementation of a multi-agent-system to assist engineers with a complex engineering tool, integration of text-to-speech and speech-to-text models to enable voice interactions, monitoring and tracing of agent-interactions with Langfuse
• Technologies: Python, LangGraph, Langfuse, OpenAI 4o, Whisper for speech-to-text/text-to-speech, FastAPI, GitLab

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October 2024 - Hackathon - Development of a learning assistant chatbot for medical students - Role: Data Scientist

• Activities: Development of a multi-agent-system chatbot using Retrieval Augmented Generation (RAG) to assist students with their studies
• Technologies: Python, Azure OpenAI, Langchain, LangGraph, FAISS vector database, GitLab, Docker

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04/2024 - 09/2024 - Improvement of ticket management with GenAI for an OEM - Role: Data Scientist

• Activities: Development of a system that suggests similar tickets and their solutions for new tickets, as well as performing and visualizing descriptive analyses of tickets, research on indexing of vector databases, embedding of existing tickets and storing in vector database
• Technologies: postgres/pgvector, Python (numpy, pandas, matplotlib, seaborn), SQL, Streamlit

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09/2023 - 02/2024 - Implementation of a digital sustainability assistent - Role: Data Scientist

• Activities: Development of a recommender system based on a similarity search of embedded query and products for a sustainability chatbot
• Technologies: Python, Langchain, weaviate (Vector DB), Azure OpenAI

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Non-project related activities

• Co-Teamlead - assisting with sales activities, staffing and recruiting of team members
• September 2023: Speaker at the European Central Bank's global Supervision Innovators Conference - topic: Large Language Models in Banking Supervision
• Oktober 2023: Speaker at the event "Frau Macht Digital - Künstliche Intelligenz: Die neue Arbeitswelt?" - topic: ChatGPT and AI in the workplace
• Oktober 2024: Speaker at the semester opening event for students of the Honors Elitestudiengänge program - topic: How does ChatGPT work?
• Trainer for internal and external trainings
• Organisation of the internal knowledge exchange format "Brown Bag Lunch"
• Organisation of regular workshops for school girls to introduce them to Data Science and thereby promoting women in tech

Analysis and visualization of development vehicle data in Tableau

Working student (Technology consulting) - supporting on a europe-wide Salesforce rollout