Rob Deas — Senior Software Engineer, Software Architect & Open Source Builder
I specialize in Java 21–25, Kotlin, Spring Boot, and developer productivity. I build tools for concurrency, security, and automation — published to Maven Central and GitHub.
This site is my working notebook for my experiments, lessons, and side projects.
Often Java or Kotlin, sometimes TypeScript, always hands-on.
New from the Notebook
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🛠️ The Cost of Concurrency Interop: Trading Clean Modularity for Shared JVM Efficiency
“I pushed the boundaries of Kotlin/Java interop in the same JVM. The result? Technically perfect, but architecturally rigid. Even with […]
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🛠 Technologies I Work With
🗂️ Also in the Notebook
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Virtual Threads Without the Magic: ABCoroutines for Kotlin
The Problem Opportunity Virtual Threads arrived with JDK 21 — promising lightweight concurrency without frameworks. But while they simplify threading, […]
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Java | open-source | Projects | Uncategorized
JCoroutines
Structured concurrency for the JVM without the magic. Why does concurrency in Java have to be so hard? I asked […]
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