Alex Rios

Principal Engineer @ Memed
Alex is a Principal Engineer at Memed, where he builds developer platforms and internal tools that empower engineering teams across the organization.
With nearly two decades of experience, he’s the author of System Programming Essentials with Go and Learning Zig, and writes about staff+ engineering and systems thinking on Substack and his personal blog.
Alex speaks regularly at international conferences and is passionate about data-oriented design, making complex systems understandable, and helping engineers grow into technical leadership roles.
Alex Rios
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This edition

Green Tea GC: the insight behind Go's new garbage collector
November 02 2026 - 12:15 (45 min )

Green Tea's insight is elegant: scan spans, not objects. But how do you actually implement that? What data structures track which objects are marked vs. scanned? Why does the ownership protocol use three states? And how did span-based scanning unlock SIMD optimizations that were impossible before?


LEVEL: Advanced

Green Tea GC: the insight behind Go's new garbage collector

Past editions

2025
Tug-of-Code: The battle for efficient iteration in Go

Iterators are a powerful tool for traversing custom data structures, enabling clean, reusable, and efficient code. In this talk, we’ll explore how iterators work in Go, from the familiar `for-range` loop to advanced patterns like pull-based iterators and mutation during iteration.

LEVEL: Intermediate

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