Sergey Fedorov - Senior Software Engineer at Datadog

Sergey Fedorov

Senior Software Engineer at Datadog

Berlin, Germany

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Summary

🤩

Rockstar

🎓

Top School

Sergey Fedorov is a Senior Software Engineer with 14 years of experience building resilient, high-throughput systems and improving developer productivity across startups and large platforms. Based in Berlin, he currently contributes to Datadog’s Ruby APM libraries and has a history of hardening production at scale—from leading resiliency and global Kubernetes automation at Shopify to scaling services from 2K to 150K RPM with Elixir and Kafka. He’s a pragmatic perfectionist who favors practical tooling over cargo-cult practices and isn’t afraid to push back when designs don’t hold up. An active open-source contributor, Sergey has made core-language improvements to TruffleRuby, touching performance-sensitive internals and C-level fixes. He routinely combines deep backend craftsmanship with infrastructure work—CI/containerization, cloud migrations, and database schema migration systems—so teams ship faster and safer. Colleagues describe him as someone who refactors boldly, automates relentlessly, and accelerates incident learning.

14 years of coding experience

17 years of employment as a software developer

City High School 47

Bachelor's Degree Information systems and technology in technical physics, Bachelor's Degree Information systems and technology in technical physics at Ural State Technical University

City School 40

English, Russian

Github Skills (5)

truffle10

graalvm10

ruby10

java9

javas9

Programming languages (14)

JavaRustCGoHTMLErlangTypeScriptShell

Github contributions (5)

oracle/truffleruby

Oct 2021 - Jun 2022

A high performance implementation of the Ruby programming language, built on GraalVM.

Role in this project:

Back-end Developer

Contributions:9 reviews, 7 commits, 4 PRs in 7 months

Contributions summary:Sergey contributed to the TruffleRuby implementation of the Ruby programming language, focusing on core language features and internal operations. They added support for features like `ENV.except`, and modifying methods in the `Array` class, as well as incorporating argument support to Dir.glob and adding functionality to Kernel.warn and Warning.warn. The user also introduced functionality within the RubyLauncher, and made minor bug fixes within the C code.

trufflerubyperformancegraalvmjruby

Strech/sidekiq-prometheus-exporter

Feb 2018 - Dec 2022

All the basic metrics of Sidekiq with pluggable contribs prepared for Prometheus

Contributions:27 releases, 14 reviews, 171 commits in 4 years 11 months

prometheus-exportersidekiq-prometheus-exporterpreparedsidekiqprometheus

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