Manuel Kießling

The DX·Tooling projects are switching from dxcli to mise:

dx-tooling.org/blog/2025-11...

YouTube video by DX·Tooling — Software Engineering & Architecture 🇩🇪 Live Coding Session: Saubere Software-Architektur mit Tests garantieren.

Erste Gehversuche im Format Video: Ich habe eine Live Coding Session im Rahmen des DX·Tooling Projekts aufgezeichnet, bei der ich unter anderem aufzeige, wie man mit speziellen Software-Tests die Einhaltung von Architekturregeln in einer Codebase garantieren kann: www.youtube.com/watch?v=i0l7...

I've put Toxiproxy between the app and the database (app connects to Toxiproxy, Toxiproxy connects to database), added a bit of latency to the connection, and voilà, realistic behavior (and realistic performance degradation) on my MacBook.

It allowed me to pinpoint a performance issue in one of my applications, where the severity of a N+1 query pattern was not really visible on my dev system (where app and database live on the same host), but was painfully visible on the production system.

GitHub - Shopify/toxiproxy: :alarm_clock: A TCP proxy to simulate network and system conditions for chaos and resiliency testing :alarm_clock: :fire: A TCP proxy to simulate network and system conditions for chaos and resiliency testing - GitHub - Shopify/toxiproxy: :alarm_clock: A TCP proxy to simulate network and system co...

Just found out about Toxiproxy, a network proxy that can be used to simulate network conditions locally:
github.com/Shopify/toxi...

It's the Playwright MCP hosted through playwright-mcp.develop-build-deploy.com (which is a brilliant service propped up by @manuelkiessling.bsky.social !)

Senior Developer Skills in the AI Age: Leveraging Experience for Better Results • Manuel Kießling How time-tested software engineering practices amplify the effectiveness of AI coding assistants.

New long-form blog post:

Senior Developer Skills in the AI Age: Leveraging Experience for Better Results

manuel.kiessling.net/2025/03/31/h...

- you need battle-tested engineering experience

- understand the problem and solution domains

- write precise and thorough, well-structured requirements

- have encompassing Quality Tools in place — tests, linters, static analysis etc; agent mode is a bliss with these in place

I have done my fair share of „vibe coding“ over the past few months, and it’s been a blast.

Turns out the key to successful and sustainable results is the same stuff we as a craft valued since basically forever: ↓

You had me at "hello, world".