Oleksandr Balyshyn
builds systems that stay up.
Java/Scala Software Engineer ·
Nine years on the JVM. Telecom pipelines at 1M events/sec sustained, 10M at peak — about 80 billion a day — held under 100ms. A Scala framework that turned three weeks of service onboarding into two days. A serverless rebuild that took 20% off the cloud bill. Off the clock: 51 public repos of ESP32 firmware, OBS tooling and Scala 3 libraries.
Nine years, four companies
Telecom pipelines at 80 billion events a day. Healthcare microservices under HIPAA. A cross-border energy exchange wired into six national grids.
What I reach for
Bars are years in production, taken from the roles above and divided by a nine-year career. Not a self-scored percentage — those measure confidence, not experience.
Everything I have shipped, in one place
Eighty public repositories across three GitHub accounts, grouped by what they do. Every entry is written from that repo's own README; language, stars and last-commit date come straight from the GitHub API. The search index is a file in this page — nothing you type leaves the browser.
Khmelnitsky National University
Say hello
Kyiv, Ukraine. Nine years remote, overlapping US and European hours. Email is fastest.