Oleksandr Balyshyn
builds systems that stay up.
Java/Scala Software Engineer ·
Nine years of fault-tolerant distributed systems — 5 billion events a day from telecom networks, a Scala framework that cut service onboarding from three weeks to two days, and a serverless rebuild that took 20% off the cloud bill. Outside work: 51 public repositories of air-quality sensors, ESP32 cameras, OBS tooling and Scala 3 libraries.
Everything I have published, in one place
Eighty public repositories across three GitHub accounts, grouped by what they are for. Each entry was written against that repository's own README and its live metadata — the language, star count and last-updated date come straight from the GitHub API. Search runs entirely in your browser; nothing is sent anywhere.
Nine years, four companies
Telecom data platforms, healthcare microservices under compliance load, and a cross-border energy exchange connecting grid operators in six countries.
What I reach for
Bar length is years of production use drawn from the roles above, measured against a nine-year career — not a self-scored rating.
Three GitHub accounts, one person
Khmelnitsky National University
Say hello
Based in Kyiv, Ukraine, and used to working remotely across US and European time zones.