Alexander Zagaynov
Lead Software Engineer at AT&T
Prague, Czechia
Summary
👤
Senior🎓
Top SchoolAlexander Zagaynov is a Lead Software Engineer based in Prague with 11 years of professional experience and a lifelong passion for programming that began with writing code at age eight. He brings deep back-end expertise in concurrent and distributed systems, contributing to notable open-source projects like concurrent-ruby and ManageIQ where he improved robustness, executor features, and cloud provider integrations. Alexander has held senior engineering and leadership roles at AT&T, EPAM, and Red Hat, and his background includes building bespoke enterprise systems and real-time warehouse solutions during an extensive freelance period. Known for pragmatic refactors, careful validation and error-guarding, he blends hands-on coding with architectural thinking to harden and scale systems. An autodidact in IT, he pairs practical experience across telecom, cloud, and enterprise domains with a persistent interest in low-level concurrency and tooling.
11 years of coding experience
23 years of employment as a software developer
IT, IT at Self study
Русский, Английский, Czech
Stackoverflow
83reputation
1kreached
4answers
1question
Github Skills (32)
ruby-rails10
back-end-development10
user-authentication10
authentication10
rails10
ruby10
manageiq10
thread10
refactoring10
concurrency10
testing9
cloud-computing9
aws8
ansible-filter6
database6
Programming languages (9)
Github contributions (5)
ManageIQ/manageiq
Dec 2018 - May 2019
ManageIQ Open-Source Management Platform
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits, 15 PRs, 52 comments in 5 months
Contributions summary:Alexander primarily focused on modifying back-end code related to endpoint validation and authentication within the ManageIQ platform. They refactored code, updated validations, and added functionality for AWS assume role features. Additionally, they addressed URL uniqueness requirements for endpoints, adjusting validation rules and integrating cloud provider exceptions. These changes reflect contributions to core functionality and provider integrations.
gcporigamiopenshiftcephredfish
ruby-concurrency/concurrent-ruby
Oct 2019 - Oct 2019
Modern concurrency tools including agents, futures, promises, thread pools, supervisors, and more. Inspired by Erlang, Clojure, Scala, Go, Java, JavaScript, and classic concurrency patterns.
Role in this project:Back-end Developer
Back-end DeveloperContributions:8 commits, 1 PR, 4 comments in 23 days
Contributions summary:Alexander primarily focused on improving the `concurrent-ruby` library's core functionality. Their contributions involved refactoring code, aligning method signatures, and enhancing thread naming conventions. Furthermore, the user addressed potential errors by adding guards against undefined methods and introduced new features for the executor, such as the ability to have a name. These modifications demonstrate a focus on improving the robustness and usability of the concurrency tools.
supervisorsthreadpatternserlangconcurrent-programming
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