Felix Winterhalter ‐ Software Developer

Hi!

I'm Felix, software developer with a focus on LLM-powered backend applications during the day, deep learning, music, book and videogame enthusiast at night. Currently working through Goodfellow's and Prince's Deep Learning books in my free time.

Core Skills

Python LLM applications AWS/Azure Machine learning Computer vision

Work Experience

Software Developer - Materna Information & Communications SE

Oct 2023 – Present|Stuttgart / Dortmund / Remote

Backend and ML/LLM-focused applications on AWS and Azure (development, deployment, operations).

Highlights

Developed software for long-term client projects and prototype/showcase applications, primarily in Python.
Served as a core developer on a pilot project that evolved into a long-term client engagement.
Built LLM-based applications for document processing, agentic information retrieval, and user support.
Deployed and optimized computer vision models on embedded devices.
Applied classical machine learning to fraud detection and created automated analysis/reporting visualizations.
Mentored working students, thesis interns, and new employees.
Represented the company externally (Showcase at E-World 2026).

AWS Azure Python Typescript MLOps Large Language Models

Projects

RAFT Robustness (Master’s Thesis)

Summer 2023 · Thesis

Feature‑level analysis of the adversarial robustness of RAFT for optical‑flow estimation; analysis of “semantic blocks.”

PyTorch Computer Vision Optical Flow Adversarial ML SSH Remote Dev

Quantum No‑Free‑Lunch (Group Research)

Winter 2022 · Code · Report · Published paper

Experimental verification and extensions of published results on quantum learning bounds.

Qiskit PennyLane IBM Quantum Python

General‑Relativistic Polygon Rendering (Bachelor’s Thesis)

Summer 2020 · Thesis · Published paper

Prototype for interactive visualization of relativistic effects near black holes.

C++ OpenGL GLSL ODEs Numerics

Web‑based Route Planner (Germany)

Summer 2019 · Code

Web route planner with interactive map and basic client/server structure.

Dijkstra HTML/JS Leaflet AJAX

Collaborative VR Solar‑System Exploration

Winter 2018/2019 · Report & Poster

Interactive VR environment for collaborative exploration of a simulated solar system.

Unity C# Photon (Multiplayer) HCI in VR

Bits and Pieces

Things I've made that are useful to me and might be useful to others.

Utils

Ongoing · Repo | Collection of useful scripts/git hooks/cli tools

C25K Companion

Jan 2026 · App · Repo | Web app for the "Couch to 5k" running program

Are these vibe coded?

Yes, large parts of them may be. These are not intended to showcase technical skill, but to solve problems I have or make my life easier, and I felt they were worth including here.

Education

Master of Computer Science (1.8)

2022 – 2023 · University of Stuttgart

Bachelor of Computer Science (2.3)

2017 – 2022 · University of Stuttgart

Bachelor of Mathematics (not graduated)

2014 – 2017 · University of Stuttgart

Abitur (1.5)

2014 · Johannes‑Kepler‑Gymnasium Reutlingen

Languages

German (Native Speaker)
English (Fluent, ~C1+)

Additional Skills

Programming

Python, Java, HTML, CSS, JavaScript, TypeScript

Cloud / DevOps

AWS, Azure, Git, GitHub Actions, Azure DevOps, CI/CD
Docker, AWS Lambda, SQS, S3, DynamoDB

AI / LLM

LLM applications, OpenAI API, Anthropic API
LangChain, LangSmith, Langfuse, Azure Document Intelligence

ML / CV

Machine learning, computer vision, PyTorch, TensorRT
NVIDIA Jetson, scikit-learn, SageMaker

Data

pandas, NumPy, Polars, Matplotlib, seaborn