Steffen
codecraftsphere.substack.com
Steffen
@codecraftsphere.substack.com
Software engineer/Cloud-native builder (Java, TypeScript, Terraform, AWS).
Writes about software (architecture), dev trends, and evolving tech.
He/him.
Latest post on how I transformed my personal workflow on how I read and learn, utilizing spaced repetition and MCPs with Claude Desktop.
How I Finally Built a Knowledge System That Stuck
A deep dive into how Obsidian, Anki, and Claude Desktop changed how I learn and remember.
open.substack.com
October 30, 2025 at 8:04 PM
Reposted by Steffen
Harvard weigere sich, seine „liberale Haltung“ aufzugeben. Nein, Tagesschau, sie weigern sich ihre #Wissenschaftsfreiheit aufzugeben.
April 15, 2025 at 6:11 PM
Started SICP with Lisp.
It’s going well—I only cry when I see nested parentheses now.

#SICP #Lisp #ProgrammingHumor #DevHumor #CodeLife
April 13, 2025 at 4:57 PM
Reposted by Steffen
Putin lässt am Palmsonntag Gläubige auf dem Weg in die Kirche bombardieren.

So geht Verteidigung abendländischer Zivilisation.
April 13, 2025 at 9:24 AM
Asking an LLM to be an interviewer for a system design problem is a fun and interactive exercise to sharpen your skills.
March 31, 2025 at 12:08 PM
Reposted by Steffen
Ich will nicht, dass meine Tagesschau-Moderatorin "Digga" auf TikTok sagt, ich will dass Faschisten und ihren Lügen im ÖR entlarvt werden.
February 20, 2025 at 2:29 PM
AWS just made cross-account event delivery in EventBridge a lot easier.

No extra infrastructure, just set permissions and send events directly.

I think it is a big step in making EventBridge a viable service for event-driven architectures.
Amazon EventBridge kündigt direkte Lieferung an kontoübergreifende Ziele an - AWS
Erfahren Sie mehr über die Neuigkeiten bei AWS mit Amazon EventBridge kündigt direkte Lieferung an kontoübergreifende Ziele an
aws.amazon.com
February 19, 2025 at 11:15 AM
Reposted by Steffen
The more I work with ORMs the more I want to go back to writing plain SQL statements again.
February 18, 2025 at 3:41 PM
Cursor IDE is more fascinating than I expected. Still favor Jetbrains Products but Cursor Composer is worth a try.
January 26, 2025 at 11:12 AM
My favorite articles and updates of the last month in one post. LangChain4J is just so smooth and easy to use, I was really fascinated by it.
CodeSparks - January Edition: LangChain4J, JEP Updates, and More
Curated Java & Tech Trends
codecraftsphere.substack.com
January 10, 2025 at 9:12 AM
Reposted by Steffen
In Norwegen oder Finnland heizen bereits mehr als die Hälfte der Haushalte mit klimafreundlichen Wärmepumpen und in Deutschland wird behauptet, bei uns wären die Winter dafür zu kalt. Die Innovationsfeindlichkeit in Deutschland schadet zunehmend der Wirtschaft. Warum sind wir so?
December 28, 2024 at 2:14 PM
Reposted by Steffen
Niemand, der sich mit IT-Sicherheit auskennt würde folgendes behaupten:
"Unser System ist absolut sicher und gegen Hacker gewappnet. Daten können nie (unrechtmässig) abfliessen".

Bei ePA:
"
Stets betonen die Verantwortlichen, dass die ePA absolut sicher sei.
"

Surprise:
38C3: Große Sicherheitsmängel in elektronischer Patientenakte 3.0 aufgedeckt
Gravierende Sicherheitslücken müssten bis zum Start der ePA 3.0 noch geschlossen werden. Das demonstrieren Martin Tschirsich und Bianca Kastl auf dem 38C3.
www.heise.de
December 28, 2024 at 7:37 AM
“Programs must be written for people to read, and only incidentally for machines to execute.” ― Harold Abelson, Structure und Interpretation of Computer Programs
December 27, 2024 at 10:54 AM
I wrote a guide on creating a custom ByteBuddy weaving plugin. It’s perfect if you want to inject custom logic (like counting object instantiations) into your or 3rd party code at runtime.

Quick, actionable, and packed with real-world use cases.
Creating a Custom ByteBuddy Weaving Plugin with Gradle: A Step-by-Step Guide
Add Code at Runtime
open.substack.com
December 21, 2024 at 9:14 AM
Well, I don’t have your machine, do I? 😅
a man says it works on my machine while making a funny face
ALT: a man says it works on my machine while making a funny face
media.tenor.com
December 18, 2024 at 6:07 PM
When I see code and think, ugh, git blame might reveal I wrote it all along. I’d say that’s progress, right? 😁
December 16, 2024 at 4:18 PM
Do you stick with ORMs for simplicity? Or switch to sql-first approaches like jOOQ when performance matters? Like jOOQ pretty much but development speed with ORMs is faster imho.
December 16, 2024 at 7:52 AM
Santa’s not the only one fueled by sweets.
Those sweets feed my focus… and my belly.
December 12, 2024 at 4:39 PM