Fredrik Bredberg - Consulting Member Of Technical Staff at Oracle

Fredrik Bredberg

Consulting Member Of Technical Staff at Oracle

Stockholm, Sweden

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Summary

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Rockstar

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Top School

Fredrik Bredberg is a seasoned embedded systems engineer with 30+ years focused on real-time kernel development—most notably long-term work on the OSE RTOS—now contributing to the Java HotSpot VM at Oracle. He brings deep expertise in operating systems, symmetric multiprocessing, multicore debugging, performance tuning, and understanding compiler optimizations, with a knack for translating low-level insights into robust runtime behavior. His recent OpenJDK contributions touch core JVM runtime components (interpreter frames, continuations, frame metadata) and RISC-V codegen, reflecting a rare crossover from hard realtime kernels to mainstream language runtimes. Based in Stockholm, he combines academic grounding in safety-critical systems with hands-on experience in telecom, defense, medical and automotive domains.

3 years of coding experience

30 years of employment as a software developer

Safety Critical Systems, Safety Critical Systems at Imperial College London

B.Sc., Computer Science, B.Sc., Computer Science at Linnaeus University

Swedish, English

Github Skills (7)

javas10

openjdk10

jvm10

java10

cprogramming-language9

c-language9

risc-v8

Programming languages (1)

Java

Github contributions (4)

openjdk/jdk

Sep 2022 - Apr 2025

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

Role in this project:

Back-end Developer

Contributions:177 reviews, 30 PRs, 256 comments in 2 years 6 months

Contributions summary:Fredrik primarily contributed to the Java Development Kit (JDK) codebase. Their work involved modifying core runtime components, including those related to interpreter frames, continuations, and frame metadata management. Specific changes focused on optimizing code, addressing potential issues related to frame padding, and ensuring the correct handling of stack traces and method calls. The user’s contributions also included fixing an assert and adjusting the generation of RISC-V code.

openjdkjavajvmjdk

fbredber/jdk

Sep 2022 - Mar 2025

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

Contributions:55 pushes, 28 branches in 2 years 6 months

openjdkjavajdk

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