Simon Tooke
Principle Software Developer At IBM
Toronto, Ontario, Canada
Summary
👤
Senior🎓
Top SchoolSimon Tooke is a principal software developer with over three decades of systems and language-engineering experience, currently working on the JDK at IBM after leading Java and Graal efforts at Red Hat. He designs and implements high-performance C++ and Java systems—compilers, JITs, aggregation engines and XML hubs—and mentors teams to ship robust production software. His open-source contributions to GraalVM include Windows PE/COFF CodeView debug support, a niche but critical enhancement that improves native debugging for compiled Java apps. A serial founder and cross-platform engineer, he’s shipped desktop, mobile and cloud products, and has deep experience porting runtimes across OSes. Based in Toronto, he blends low-level toolchain expertise with pragmatic product delivery and a talent for turning research prototypes into market-ready systems.
10 years of coding experience
41 years of employment as a software developer
Bachelor of Science (BSc) (Honours), Bachelor of Science (BSc) (Honours) at University of Waterloo
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (9)
javas10
compiler10
debugging10
compiler-compiler10
graalvm10
java10
aot9
c119
c179
Programming languages (12)
Github contributions (5)
oracle/graal
Jan 2020 - Feb 2026
GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀
Role in this project:
Back-end Developer
Back-end DeveloperContributions:171 reviews, 13 PRs, 341 comments in 6 years 2 months
Contributions summary:Simon contributed to the development of Windows-specific debugging information within the GraalVM project, focusing on PE/COFF file format support. Their work involved adding and modifying code related to CodeView (CV) debug information, including the creation of various CV type records and relocation sites within the object file. These changes are critical for providing detailed debugging capabilities for Java applications compiled into native executables on Windows platforms.
graalvmjavaaotcompiler
stooke/jdk
Mar 2022 - Jun 2026
JDK main-line development
Contributions:159 pushes, 18 branches in 4 years 3 months
javajvmjdk
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