Ronen Barzel
Co-Founder at Current Focus
City of Edinburgh, Scotland, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolRonen Barzel is a veteran software architect and co-founder with 16+ years of experience specializing in computer graphics, physically-based modeling, and production animation infrastructure. Based in Edinburgh, he blends deep academic training (PhD Caltech) with hands-on production R&D at studios like Pixar and Weta Digital and leadership roles across startups and research organizations. He consults as a principal while co-running Drawbridge Labs and co-founds the Journal of Computer Graphics Techniques, reflecting a long commitment to technical writing, teaching, and community stewardship. Ronen contributes to notable open-source projects such as Halide—improving its OpenGL backend and reliability—and has a track record of refactoring and hardening complex backends like the gentle aligner. Comfortable moving between low-level performance engineering and higher-level system design, he brings both rigorous math for graphics and pragmatic infrastructure experience to production pipelines. An often-overlooked strength is his history of creating durable organizational and editorial systems, from conference programs to academic journals, that scale creative and technical teams.
16 years of coding experience
30 years of employment as a software developer
Master of Science - MS Computer Science, Master of Science - MS Computer Science at Brown UniversityCalifornia Institute of Technology
Github Skills (17)
python10
audio-processing10
kaldi10
performance-optimization10
opengl10
c-language9
cprogramming-language9
refactoring9
command-line-interface8
command-line8
testing8
api-design8
compiler-compiler7
compiler7
gpu6
Programming languages (14)
Github contributions (5)
strob/gentle
Mar 2016 - Sep 2016
gentle forced aligner
Role in this project:
Backend Developer
Backend DeveloperContributions:23 commits, 13 PRs, 7 comments in 6 months
Contributions summary:Ronen primarily contributed to the backend functionality of the "gentle forced aligner" repository. They refactored core classes, moving logic out of `serve.py` into more modular files like `gentle/forced_aligner.py` and `gentle/full_transcriber.py`. Significant effort was put into creating and integrating a command-line interface (`align.py`) to run the forced aligner without requiring a server. The user also restructured file paths and dependencies to improve overall code organization and maintainability.
alignergentle
halide/Halide
May 2016 - Oct 2017
a language for fast, portable data-parallel computation
Role in this project:Performance Engineer
Performance EngineerContributions:38 commits, 18 PRs, 51 comments in 1 year 4 months
Contributions summary:Ronen primarily focused on optimizing the performance of the Halide library's OpenGL backend. Their contributions include reducing the verbosity of trace output to minimize clutter during debugging and implementing a RAII-style mechanism for saving and restoring OpenGL state, which improves code reliability. They also added tests related to OpenGL state management and texture handling to address potential bugs. Finally, the user contributed to integrating and improving the demo app, including fixing Ubuntu 16.04 and Ubuntu 14.04 compatibility.
computationhexagonhalideparallelgpu
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