John Koleszar
Staff Software Engineer, Manager at Google AI
Greater Boston United States
Summary
👤
Senior🎓
Top SchoolJohn Koleszar is a seasoned staff software engineer and manager with 16 years of experience building back-end, close-to-the-metal systems and leading teams at the intersection of machine learning and hardware. Currently managing system software for an unannounced Google AI project, he blends expertise in kernel drivers, PCIe, low-latency/high-throughput systems, board bringup and manufacturing test with hands-on leadership. His background spans video codecs and distributed systems—from improving libvpx test infrastructure to senior roles at Google and X—so he moves comfortably between refactoring test frameworks and shipping silicon-adjacent products. Colleagues rely on him to bring order to chaotic projects and amplify team effectiveness through mentoring and pragmatic engineering. Based in Greater Boston, he pairs deep technical breadth with a preference for high-impact, hard-problem work and a knack for tackling the “soft” organizational challenges that make engineering sustainable.
16 years of coding experience
16 years of employment as a software developer
BS, BS at Rensselaer Polytechnic Institute
Github Skills (8)
c-language10
software-design10
cprogramming-language10
video-codec10
testing10
algorithms9
implement9
algorithm9
Programming languages (5)
Github contributions (5)
webmproject/libvpx
May 2010 - Apr 2014
Mirror only. Please do not send pull requests.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1581 commits in 3 years 11 months
Contributions summary:John's contributions primarily revolve around enhancing the test infrastructure and framework of the libvpx project, focusing on codec and filter implementation within the project's test suite. Their work centers on creating a flexible system for testing multiple codecs, involving refactoring existing code to introduce a codec factory object. Their work included efforts to improve the accuracy and coverage of subpixel filtering and transform functionality.
pull-requests
webmproject/vp8-test-vectors
May 2010 - Jul 2011
Contributions:6 commits in 1 year 1 month
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.