Shahzad Muzaffar
Software Engineer at CERN
Greater Chambery Area France
Summary
🤩
Rockstar🎓
Top School
Top expert inHigh-Performance Machine Learning Computing
Shahzad Muzaffar is a seasoned software engineer with 20 years of experience, currently contributing to CERN from the Greater Chambéry area in France. He specializes in back-end systems, core algorithm implementation and performance optimization in C++, with deep involvement in flagship scientific projects like CMS Offline Software (cmssw) and ROOT. His work spans algorithm correctness, build-system maintenance, and cross-platform compatibility—evidenced by patches addressing architecture-specific types, LLVM/C++17 transitions, and critical bug fixes such as use-after-free issues. Shahzad brings a rare blend of scientific computing domain knowledge from long-term lab collaborations (CERN, Fermilab) and practical systems engineering that keeps large-scale research software reliable and performant. Colleagues rely on him for hard-to-debug system-level problems and for modernizing legacy codebases without sacrificing throughput. He pairs an academic background in electronics and computing with hands-on stewardship of widely used open-source scientific tools.
20 years of coding experience
3 years of employment as a software developer
Msc, Electronics, Msc, Electronics at Quaid-e-Azam University, Islamabad8th, General, 8th, General at F.G. Middle School for Boys, Mareer Hasan, RawalpindiBsc, Pre-Engineering, Math, Physics, Bsc, Pre-Engineering, Math, Physics at F.G Sir Syed College, RawalpindiPGTP, Computer software and hardware, PGTP, Computer software and hardware at Computer Training Centre (CTC), IslamabadS.S.C, Science, S.S.C, Science at F.G. Technical High School Chaklala, Rawalpindi
Github Skills (31)
algorithms10
root-view10
debug10
debugging10
c-language10
build-configuration10
r10
cer10
build-system10
high-energy-physics10
cmake10
rootkit10
buildconfig10
c1710
performance-optimization10
Programming languages (15)
Github contributions (5)
cms-sw/cmssw
Apr 2006 - Jan 2023
CMS Offline Software
Role in this project:
Back-end Developer & Algorithm Implementer
Back-end Developer & Algorithm ImplementerContributions:5 releases, 353 reviews, 2236 commits in 16 years 11 months
Contributions summary:Shahzad's commits focused on implementing and improving core analysis algorithms within the context of the CMS Offline Software project, particularly concerning the CMS Offline Software. They were responsible for integrating and modifying various algorithms related to analyzing and processing data within the framework. Their work primarily involved C++ code changes, with a significant emphasis on performance optimization, algorithmic correctness, and adapting the existing functionalities to utilize new libraries (e.g., ROOT6). They also contributed to the static analysis and refactoring of code to meet the project's guidelines and adapt the software to be compatible with the new LLVM versions.
cmscernweb-appc-plus-plusbackbonejs
cms-sw/cmsdist
Sep 2006 - Jan 2023
CMS Offline Software build configuration
Role in this project:Back-end Developer
Back-end DeveloperContributions:319 reviews, 7883 commits, 6183 PRs in 16 years 7 months
Contributions summary:Shahzad's commits indicate a focus on build configuration for a CMS Offline Software project. The user addressed a build issue related to the amd64 architecture by forcing the 'uint' type to be 'unsigned int' in a patch file, suggesting familiarity with build systems and low-level code. The user also rebuilt and updated patches for trunk versions of the project, suggesting maintenance and compatibility efforts. Additional contributions include adding files for a new cascade tool and a patch for handling root patches, highlighting diverse work.
cmsbuild-configurationoffline
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