Volker Janz – Medium

Volker Janz

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Volker Janz
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Towards Data Science

Create an AI-Driven Movie Quiz with Gemini LLM, Python, FastAPI, Pydantic, RAG and more

Discover the basics of using Gemini with Python via VertexAI, creating APIs, and the fundamentals of Retrieval-Augmented Generation (RAG)

21 min readApr 18, 2024

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Create an AI-Driven Movie Quiz with Gemini LLM, Python, FastAPI, Pydantic, RAG and more

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Volker Janz
in
Towards Data Science

A Definitive Guide to Using BigQuery Efficiently

Make the most out of your BigQuery usage, burn data rather than money to create real value with some practical techniques.

20 min readMar 3, 2024

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A Definitive Guide to Using BigQuery Efficiently

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Volker Janz
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Data Engineer Things

Create your own Gemini AI-chatbot with a twist using Python, Jinja2 and NiceGUI

Discover the basics of using Gemini with Python via VertexAI, creating a Web UI with NiceGUI and using Jinja2 to construct modular prompts

15 min readApr 25, 2024

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Create your own Gemini AI-chatbot with a twist using Python, Jinja2 and NiceGUI

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Volker Janz
in
Data Engineer Things

Easter egg hunt with BigQuery and User-Defined Functions (UDFs)

Discover the basics of extensibility with BigQuery User-Defined Functions (UDFs) with a little Easter egg hunt game

9 min readApr 1, 2024

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Easter egg hunt with BigQuery and User-Defined Functions (UDFs)

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Volker Janz
in
Towards Data Science

Real-time Twitch chat sentiment analysis with Apache Flink

Let’s learn about Apache Flink and sentiment analysis by building a real-time sentiment analysis streaming application for the Twitch chat

22 min readMar 27, 2024

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Real-time Twitch chat sentiment analysis with Apache Flink

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Volker Janz
in
Data Engineer Things

Gotta process ’em all — DuckDB masters your data like a Pokémon trainer

Practical examples how to use DuckDB as a tool for data wrangling based on Pokémon API data

12 min readMar 19, 2024

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Gotta process ’em all — DuckDB masters your data like a Pokémon trainer

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Volker Janz
in
Data Engineer Things

Exploring StarCraft 2 data with Airflow, DuckDB and Streamlit

Example on how to create an Airflow DAG to fetch data from the StarCraft II API, utilize DuckDB for processing and Streamlit for…

20 min readMar 16, 2024

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Exploring StarCraft 2 data with Airflow, DuckDB and Streamlit

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Volker Janz
in
Dev Genius

An introduction to Airflow, setting up a local environment and writing your first DAG

Let me guide you through the process setting up a local Airflow environment as well as writing your first DAG using the TaskFlow API

7 min readFeb 28, 2024

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An introduction to Airflow, setting up a local environment and writing your first DAG

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Volker Janz

Hello world

Time for a new project, learn about my journey of creating a new blog / page with Jekyll based on Markdown.

3 min readFeb 28, 2024

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Hello world

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Volker Janz

Volker Janz

Expert Data Engineer @ InnoGames | 👨‍💻 Data Engineering, SQL, Python, Java, Kafka, Flink, Hadoop, Cloud | 🎙️ Passionate Speaker | 🧩 I Bring Big Data to life

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