Professional Summary

Senior Software Engineer with 15+ years of experience in systems programming, graphics, scientific computing, and full-stack development. Known for identifying the simplest effective technical solutions and leaving codebases faster, leaner, and more reliable. Proven track record of large-scale refactors, cross-platform engineering, and delivering measurable performance improvements across macOS, Linux, Windows, Android, and iOS.

Technical Skills

• Languages: Go, C++, JavaScript, Python, C, Java, Shell Scripting
• Software Tools: React, NPM, Docker, Kubernetes, Git, CMake, OpenGL
• Operating systems: MacOS, Unix, and Linux workstations and servers, Android and iOS.
• Specialties: scientific and numerical computing, scientific visualization, computer graphics, full-stack web development, microservices, databases.

Education

• University of North Carolina at Chapel Hill, Master of Science, Computer Science, August 2013.
• University of Wisconsin-Madison, Bachelor of Science, Physics and Mathematics, May 2001.

Experience

• Senior Software Engineer, Aternity LLC./Riverbed Technology LLC. Jan 2021–Dec 2025

  • MacOS software engineer for MacOS End User Experience Agent. Rewrote EUE Agent in Go to reduce resource use by more than half. https://www.aternity.com/
  • Ported MacOS DEM agent to Linux; Worked on project to port Riverbed Unified Agent from Linux to MacOS.
  • Go/C/Objective-C/C++ system programing on MacOS.

• Senior Software Engineer, Voith Digital. Apr 2020–Oct 2020

  • Full-stack software engineer for Voith OnCumulus Industrial Internet-of-Things project (http://voith.com/corp-en/digital-solutions/oncumulus.html).
  • Worked on creating the Voith Paper Break Protector tool: using machine learning to predict potential industrial problems and display these risks to machine operators.
  • React/JavaScript frontend.
  • Go microservices backend.
  • Agile development on a distributed, remote team.

• Software Engineer, Google, Inc. Sep 2013–Jan 2020

  • Member of the Skia 2D graphic library (https://skia.org/) team.
  • Created SkQP, a project to use Skia rendering tests to generate new Android Compatibility Test Suite tests for OpenGLES and Vulkan drivers, for Android Pie and Andoroid 10 (https://skia.org/dev/testing/skqp).
  • Maintained SkPDF, Skia's PDF generator used by Chrome printing and Android framework. Refactored entire code to use a fraction of the RAM, execute faster, be threadsafe and optionally multithreaded (https://skia.org/user/sample/pdf).
  • Experience running, testing, debugging Skia software library on Linux, MacOS, Windows, Android and iOS.
  • Wrote example and testing applications for Android and iOS, linking a native C++ library to Java (via JNI) or Objective-C (e.g. https://halcanary.org/skottie-ios-app/).
  • Contributed to API documentation and examples.
  • Created scripts in Python, Go, and Shell to automate tasks (e.g. https://halcanary.org/git-sync-deps/).

• Research Assistant, UNC-Chapel Hill, Computer Science Department. May 2011–Aug 2013

  • Created novel tools for visualizations of high-dimensional statistical distributions.
  • Built visualizations for scientific data (nuclear quantum-chromodynamic plasma simulation, meteorologic simulation, and cosmological galactic formation simulation datasets) using VTK and ParaView.
  • Iteratively designed and developed the MADAI Distribution Sampling Tools (https://halcanary.org/madai-dst/) and the MADAI Visualization Workbench (https://halcanary.org/madai-bench/).
  • Developed new VTK filters and ParaView macros.
  • Collaborated with domain scientists to develop visualization and statistical product requirements.

Publications

• Hal Canary, Russell M. Taylor II, Cory Quammen, Scott Pratt, Facundo A. Gómez, Brian O'Shea, Christopher G. Healey. “Visualizing Likelihood Density Functions via Optimal Region Projection.” Computers & Graphics 41 (2014): 62–71. (https://halcanary.org/optimal-region-projection/)
• Steffen A. Bass, Hannah Petersen, Cory Quammen, Hal Canary, Christopher G. Healey, Russell M. Taylor II. “Probing the QCD Critical Point with Relativistic Heavy-Ion Collisions.” Central European Journal of Physics (2012) 10, 1278–1281. (https://doi.org/10.2478/s11534-012-0076-1)
• Hal Canary. “Aztec Diamonds and Baxter Permutations.” The Electronic Journal of Combinatorics 17 (2010), #R105 (https://halcanary.org/aztec-diamonds/)