Alexandr Sidorenko
Software Engineer
Belgrade, Central Serbia
Summary
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SeniorAlexandr Sidorenko is a backend developer with 11 years of hands-on experience building resilient, production-grade web systems, currently focused on Node.js, RabbitMQ, Redis, MongoDB and k8s in Belgrade. He’s shipped full lifecycle products—from a long-running document management system that automated partner onboarding to a scalable HRTech service that automates tax calculations and receipts—often designing event-driven architectures and queue-based optimizations that improved query performance up to 4x. Early interest in security and CTF organization informs a pragmatic approach to reliability and error recovery, including self-healing process flows and detailed failure reporting for non-technical users. Alexandr’s background spans fullstack React/TypeScript work and deep backend engineering, and he has hands-on experience reducing third-party API dependency to cut costs and improve stability. He combines a lifelong curiosity about computing with a history of community teaching and hackathon wins, and prefers shifting complexity server-side to simplify client experience.
11 years of coding experience
Github Skills (94)
ascii10
slugify10
slug10
fonts10
normalization10
chat-application10
ufo10
truetype10
project-management9
javascript9
figlet9
jira9
unicode9
semantic-versioning9
iconv9
Programming languages (16)
Github contributions (5)
blurtechlegacy/password-protected-hello-world
Apr 2019 - Feb 2026
Password-protected "Hello World" on different programming languages
Contributions:8 PRs, 16 pushes, 1 branch in 6 years 11 months
programming-language
blurtechlegacy/trasher-frontend
Sep 2019 - Feb 2026
Contributions:8 PRs, 33 pushes in 6 years 5 months
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