Arseniy Zlobintsev
Senior Software Engineer at bunny.net
Kyiv, Ukraine
Summary
🤩
Rockstar🎓
Top SchoolArseniy Zlobintsev is a performance-focused Senior Software Engineer with 9 years of experience building and tuning low-latency, mission-critical systems across CDN, proxy, and payment domains. He brings deep .NET internals expertise and low-level optimization skills—C#, assembly, vectorization and profiling—that he has applied to both commercial systems (DraftKings, bunny.net) and contributions to the dotnet/runtime project (macOS-ARM64 CPU detection, vectorized init paths, TryGetSpan integrations). Comfortable across microservices, observability, and resilience engineering, he excels at bridging engineering, ops and incident response to deliver robust, high-throughput services. Colleagues rely on him for library-level fixes and performance wins that are invisible to users but critical at scale. Based in Kyiv, he pairs a pragmatic engineering mindset with a penchant for low-latency hacks (and a GitHub bio that suggests 400mg of caffeine).
9 years of coding experience
5 years of employment as a software developer
International Business, International Business at Uniwersytet Ekonomiczny we Wrocławiu (daw. Akademia Ekonomiczna im. Oskara Langego we Wrocławiu)
English, Ukrainian
Github Skills (12)
net10
asp-net10
arm10
dotnet10
csharp10
vectorization10
performance-optimization10
dotnet-core10
data-structure9
algorithm9
data-structures9
algorithms9
Programming languages (16)
Github contributions (5)
dotnet/runtime
Jan 2022 - Jan 2022
.NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:52 reviews, 1 commit, 17 PRs in 1 day
Contributions summary:Arseniy made several contributions focused on optimizing the .NET runtime. This included extending CPU capabilities detection for macOS-ARM64, vectorizing initialization processes for improved performance, and adding fast paths for methods like Linq's `Count` with predicates. Furthermore, the user integrated `TryGetSpan` throughout the codebase to improve code efficiency. They also added native ARM64 popcount functionality.
dotnetruntimelinuxcsharpxamarin
neon-sunset/http-bench
Sep 2022 - Dec 2024
Simple http benchmark because Gatling and NBomber were too slow and are made for big brain developers unlike me
Contributions:2 releases, 5 PRs, 22 pushes in 2 years 3 months
benchmarkgatlingslownativeaot
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