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Nicolas Fränkel is a technologist focusing on cloud-native technologies, DevOps, CI/CD pipelines, and system observability. His focus revolves around creating technical content, delivering talks, and engaging with developer communities to promote the adoption of modern software practices. With a strong background in software, he has worked extensively with the JVM, applying his expertise across various industries. In addition to his technical work, he is the author of several books and regularly shares insights through his blog and open-source contributions.
- Skills across coding assistants (2026-11-08)
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I love Claude Code, but I use it so much that I regularly exhaust my weekly quota before the week ends. When that happens, I usually switch to other free-tier CLIs, e.g., Google Antigravity, GitHub Copilot, and, just last week, Mistral’s Vibe. I really wanted to try Vibe to evaluate the feasibility of moving away from Claude Code in favor of a more sovereign solution. Vibe only offers a single model by default, Mistral Medium 3.5.[…]
- From Google Drive to Syncthing over Tailscale (2026-11-01)
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I used Dropbox for decades, then switched to Google Drive. Both worked for most of my files. One file never fit, though: my KeePass password database. It’s the file I need on every device and the file I want to keep private the most. After one annoyance too many, I moved it to Syncthing over Tailscale. The rest stays on Google Drive, for now. This post describes why and how. The file that made me care My password manager is KeePass-based.[…]
- Security Baked Into the JVM: DirtyChai scales vertically, JGDMS scales horizontally (2026-10-25)
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Nobody runs a SecurityManager in production. The usual reason given is that it does not survive a load test, and every guarantee in this series was bought with a check: a constraint on each call, an audit before each load, a principal set on each thread, a digest on each grant. Part 1 declared constraints on a remote call. Part 2 vetted code before a client loaded it. Part 3 and Part 4 established who is calling and carried that chain across the wire.[…]
- Practical introduction to OpenTelemetry tracing @ KCD Suisse Romande
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Tracking a request’s flow across different components in distributed systems is essential. With the rise of microservices, their importance has risen to critical levels. Some proprietary tools for tracking have been used already: Jaeger and Zipkin naturally come to mind. Observability is built on three pillars: logging, metrics, and tracing. OpenTelemetry is a joint effort to bring an open standard to them. Jaeger and Zipkin joined the effort so that they are now OpenTelemetry compatible. In this talk, I’ll describe the above in more detail and showcase a (simple) use case to demo how you could benefit from OpenTelemetry in your distributed architecture.






