Callum Groeger
Software Development Engineer II at Amazon Web Services (AWS)
Dublin, Ireland
Summary
🤩
Rockstar🎓
Top SchoolCallum Groeger is a Software Development Engineer II based in Dublin with 11 years of experience building backend and systems software, currently at Amazon Web Services. He has a strong systems focus demonstrated by substantial contributions to the bytecodealliance/wasm-micro-runtime project—adding socket enhancements, HTTP downloader and multicast support, and memory watchpoint-based source debugging inside the interpreter. His work spans production cloud services and low-level runtime improvements, reflecting an ability to operate across distributed systems and embedded-like runtimes. A Master of Informatics from the University of Edinburgh, Callum blends academic rigor with hands-on engineering delivery across internships and roles at Barclays, AWS, and education-focused tech projects. Notably, his contributions to WAMR show a knack for adding practical networking and debugging capabilities to open-source runtimes that ease development and observability.
11 years of coding experience
2 years of employment as a software developer
Master of Informatics (Computer Science) (MInf), Informatics, Master of Informatics (Computer Science) (MInf), Informatics at The University of Edinburgh
Github Skills (15)
c1710
debugging10
debug10
blazor-webassembly10
socket10
webassembly10
wasi10
c1110
interpreter10
runtimes9
embedded9
multicasting8
multicast8
jit7
aot7
Programming languages (3)
Github contributions (5)
bytecodealliance/wasm-micro-runtime
Sep 2022 - Dec 2022
WebAssembly Micro Runtime (WAMR)
Role in this project:
Back-end Developer & System Architect
Back-end Developer & System ArchitectContributions:23 reviews, 15 commits, 7 PRs in 3 months
Contributions summary:Callum significantly contributed to the WASM Micro Runtime (WAMR) project, focusing on enhancing its socket functionalities and debugging capabilities. They implemented socket send/recv timeout options, expanded socket functionalities by adding HTTP downloader and multicast socket options. Moreover, the user added memory watchpoint support for source debugging within the interpreter, including integrating read/write watchpoints. Furthermore, several socket examples demonstrating various socket options were added.
assembly-scriptjitrustruntimewebassembly
cimacmillan/wasm-micro-runtime
Aug 2022 - May 2023
WebAssembly Micro Runtime (WAMR)
Contributions:2 PRs, 75 pushes, 15 branches in 8 months
rustwasmerruntimewebassemblywasmtime
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