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Ein fokussierter Tech-Blog über technische Systeme, Produktentwicklung, KI-Workflows und praxisnahe Erkenntnisse aus dem Software-Alltag.

Local SD-JWT and OpenID4VP verification for EUDI Wallet
There are already decent SD-JWT decoders. Paste a token, get a JSON tree. That solves half the problem. When I started wiring EU Digital Identity presentations for EUDI × Solana, the questions I actua

How I turned behavioral science into testable Kotlin
This is part 2 of a two-part series on building Habit Arc. Part 1 was about why I built it around the science of automaticity instead of streaks. This part is about the architecture — and the lessons

Why I stopped counting streaks and started measuring automaticity
This is part 1 of a two-part series on building Habit Arc, a local-first Android habit tracker. This part is about why I built it and the science it's built on. Part 2 is about the architecture. I've

Building a PostgreSQL Browser for Obsidian with Electron
I was in the middle of work, had Obsidian open already, and just needed to inspect a local PostgreSQL database. Normally that means switching apps, opening pgAdmin, logging in again, and clicking thro

Streamline Your x402 API Monitoring with x402station: A Comprehensive Guide
Hey folks, I’m excited to share: x402station.com — a platform designed for anyone working with x402-powered services. It’s all about giving you the tools to discover, monitor, and track the performance of x402 APIs, all in one place. My hope is that ...

Validating Next-Auth JWE Tokens in NestJS: A Step-by-Step Guide
Hey there! 👋 Today I'm diving into a topic that had me puzzled for longer than I'd like to admit: validating Next-Auth JWE tokens in a NestJS backend. If you've ever tried to build a full-stack application with Next.js on the frontend and NestJS on ...

From the Warehouse Floor to Web3: My Experience Entering Software Development
Hey there! 👋 Welcome to my little corner of the internet. I'm Yannick, and this is where I'll be sharing my thoughts, experiences, and discoveries as I navigate the wild world of software engineering and blockchain development. But first, let me ask ...