Grzegorz Milos
ICloud Engineer at Apple Inc.
Greater Cambridge Area United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolGrzegorz Milos is an experienced iCloud engineer with nine years in cloud and systems software, currently contributing to Apple’s server-side CloudKit technologies. He brings deep kernel and performance expertise from roles at Bromium, Acunu, Citrix and research positions, grounded in a PhD in Computer Science from the University of Cambridge. A practical performance engineer, he has contributed to the high-profile swift-nio project—fixing scheduler bugs, reducing memory allocations and improving benchmarking—demonstrating an ability to optimize low-level concurrency and throughput. Comfortable across kernel, OS X application compartmentalization and large-scale cloud services, he blends research rigor with production-focused engineering. Based in the Greater Cambridge area, he often operates at the intersection of systems research and commercial product delivery.
9 years of coding experience
6 years of employment as a software developer
Doctor of Philosophy (Ph.D.), Computer Science, Doctor of Philosophy (Ph.D.), Computer Science at University of CambridgeDulwich College
Stackoverflow
13reputation
332reached
0answers
1question
Github Skills (11)
asynchronous10
event-driven10
swift10
high-performance10
non-blocking10
performance-optimization10
networking10
async10
testing8
safari6
calayer6
Programming languages (4)
Github contributions (5)
apple/swift-nio
Jun 2020 - Jun 2020
Event-driven network application framework for high performance protocol servers & clients, non-blocking.
Role in this project:
Back-end Developer & Performance Engineer
Back-end Developer & Performance EngineerContributions:22 reviews, 1 commit, 10 PRs in 1 day
Contributions summary:Grzegorz primarily focused on improving the performance and stability of the `swift-nio` framework. Their contributions involved fixing critical bugs related to task scheduling, specifically addressing issues with EventLoopGroup and RepeatedTask. The user optimized the NIOThreadPool work queue by addressing a CoW performance bug, incorporating Deque, and reducing memory allocations. Furthermore, they contributed to performance benchmarking and fixing output formatting for performance analysis results.
swift5event-drivennon-blockingswift-servertcp
gmilos/swift-nio
Jun 2020 - Mar 2024
Event-driven network application framework for high performance protocol servers & clients, non-blocking.
Contributions:27 pushes, 7 branches in 3 years 9 months
non-blockinghttpserverswiftnioevent-loopnetworking
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