Jun Z
Senior Research Scientist & Tech Lead (Varian) at Siemens Healthineers
Zurich, Zurich, Switzerland
Summary
👤
Senior🎓
Top SchoolJun Z is a senior research scientist and tech lead based in Zurich with 10 years of experience building high-throughput, real-time software and ML solutions for large-scale scientific facilities and medical imaging. Currently leading motion management and algorithm development at Siemens Healthineers (Varian), he combines physics-rooted rigor from a PhD with hands-on C++ and ML engineering to deliver production-grade systems that process GB/s data streams. His prior work includes designing EXtra-foam for real-time visualization at European XFEL and RECASTX for near real-time 3D tomographic reconstruction at PSI, the latter supported by a CHF 300k SDSC grant. Jun is an active open-source contributor to performance-sensitive libraries like xtensor, improving numerical robustness (NaN-aware statistics) and test coverage, reflecting a deep attention to correctness in scientific computing. He has a track record of translating noisy experimental data into robust models and systems, earning recognition such as DESY’s special achievement award for real-time virtual diagnostics. Colleagues rely on him to bridge research, engineering, and user-facing operations in mission-critical, data-intensive environments.
10 years of coding experience
8 years of employment as a software developer
Doctor of Philosophy (PhD), Physics, Doctor of Philosophy (PhD), Physics at University of HamburgBachelor of Engineering - BE, Nuclear Engineering and Technology, Bachelor of Engineering - BE, Nuclear Engineering and Technology at Tsinghua University
English, Chinese, German
Github Skills (10)
unit-testing10
c-language10
tensor10
cprogramming-language10
multidimensional-arrays10
numpy10
data-structure9
algorithm9
data-structures9
algorithms9
Programming languages (6)
Github contributions (5)
xtensor-stack/xtensor
Sep 2019 - Mar 2021
C++ tensors with broadcasting and lazy computing
Role in this project:
Back-end Developer & QA Engineer / Test Automation Engineer
Back-end Developer & QA Engineer / Test Automation EngineerContributions:27 reviews, 18 commits, 16 PRs in 1 year 6 months
Contributions summary:Jun focused on improving the `xtensor` library's math functions, particularly related to NaN handling. They implemented enhancements to the `nanmean` and `variance` functions by fixing return data types and adding result type template arguments to these functions, improving code accuracy and flexibility. They also added unit tests to verify the functionality of the `nanmean`, `nanvar`, `nanstd` and `variance` functions and improve the histogram performance.
cppmpinumpypython-bindingsc-plus-plus
zhujun98/linacopt
Jan 2017 - Jun 2018
Contributions:81 commits, 49 pushes, 1 branch in 1 year 4 months
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