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Become a sponsor to Rafael Winterhalter

Hello, my name is Rafael and I am a software consultant and open source developer, mainly active in the Java ecosystem. I create a library called Byte Buddy but I am involved in a row of projects to share my knowledge on byte code manipulation and JVM internals that I have built over the years. I live and work in Oslo, Norway.


I intend GitHub sponsors only as an opportunity for companies that want to support my work without a procurement process. I appreciate it, but please understand that a donation implies that I cannot offer you any service in return. Generally, I prefer one-time payments over monthly donations as this reduces my documentation overhead, but I am of course happy to receive either!

If you are an individual, I appreciate your intent to support me, but I'd rather see your money used on a charitable cause. Please enjoy my software and I am happy to welcome you back, if you have built a profitable company using it. Until then, please keep your money!

If you are a company looking for support for my software, this is not the right place! Quite the opposite, as I cannot legally offer anything in return without proper VAT processing and invoicing. Please reach out to me instead.

Thank you for your support!

Current sponsors 1

Private Sponsor
Past sponsors 13
@sormuras
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@jvasileff
@asolntsev
@stokito
@khmarbaise
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@RedHatOfficial
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Featured work

  1. raphw/byte-buddy

    Runtime code generation for the Java virtual machine.

    Java 6,295
  2. documents4j/documents4j

    documents4j is a Java library for converting documents into another document format

    Rich Text Format 557
  3. mockito/mockito

    Most popular Mocking framework for unit tests written in Java

  4. raphw/weak-lock-free

    Implementation of a concurrent map with weak keys and a detached thread local storage.

    Java 116
  5. openjdk/jdk

    JDK main-line development https://openjdk.org/projects/jdk

  6. raphw/xjcoptional

    A XJC plugin to make getters of optional properties Optional.

    Java 6

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