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i Note This blog post is based on my personal experience of adopting OpenSpec when building a new greenfield project & using for legacy codebases. It’s a tool that genuinely improves my workflow and I believe many teams can benefit from its adoption. What’s OpenSpec and Why Might You Need It? OpenSpec is basically a collection of skills / commands (read: markdown files) which will create specification files for you as the basis for you implementation....

Disclaimer: This post was written without the help of AI. Research for the self hosting setup (which docker images to use, Jellyfin vs. Plex) and the creation of initial configurations (docker-compose, wireguard) were supported by AI (among others like e.g. Reddit, Stackoverflow) How It All Started If you don’t care about my motivations and are only interested in the technical setup just directly jump to Self Hosting Setup! Spotify Price Increase In August 2025 Spotify announced a price increase in Germany....

Our Goal Finding affordable apartments is hard. We may not be able to influence rental prices but at least we can bring some transparency into the market. Our goal: We want to collect apartment listings with corresponding meta information like rental prices, square meters and location. To achieve this we will: Crawl wg-gesucht.de Write the results to a sqlite database Write a small Django to serve our scraped data as a dashboard You can find the source code on Github....

Why Kafka Connect? While you can always write your own Kafka connector to write data from Kafka to S3 or a database using for example confluent-kafka-python, this might be hard to maintain and error prone. Kafka Connect can help you to simplify this task. In this post we will … … set up a local Kafka cluster, S3 storage & Kafka Connect with Docker Compose … create a Kafka topic and publish messages to it … use Kafka Connect to create an S3 sink connector and write the messages to S3 Run the Example You can run the full example which is described in this post by executing the following script: It will download the necessary files, start the containers, create a Kafka topic, publish messages, and create an S3 sink connector to write the data to S3:...

What’s ARIMA and Why Should You Care? If you’re working with time series and you need to produce forecasts, autoregressive moving-average models (AR(I)MA) are still a good place to start. But which Python implementation should you use (if you don’t want to use R)? Recently I’ve been again looking into what the Python ecosystem has to offer in regards to time series analysis in general and ARIMA models in particular. There are quite a few options, however you should have a rough understanding what’s happening under the hood: Are we dealing with a framework that wraps existing libraries or native implementations?...