Orest Klymko
Software architect & backend engineer. I design distributed systems and own delivery end to end — from business requirements through architecture to production.
Kotlin/Java, Spring Boot, Kubernetes, event-driven architecture. Currently architecting an enterprise data pipeline platform; previously owned projects end to end across a 10+ microservice system at Erste Digital, one of Europe's largest banking groups.
- 5+ yrs
- building production systems
- 10+
- microservices architected & led
- Co-founder
- of a production mobile platform
- 4 languages
- EN · UK · SK · RU
Selected work
All work →A job that can crash, retry, or run twice — and still never lose an order
A 300,000-record, multi-format export moved out of the request thread entirely — and made impossible to lose, duplicate, or leave stuck forever.
Spring BootPostgreSQLRDF4JKubernetesFrom "grep every pod and hope" to one trace ID across a 7-service chain
From guessing which of seven services (plus NiFi, twice) swallowed a record, to pasting one ID and watching its whole journey unfold.
OpenTelemetry CollectorGrafanaTempoLokiPrometheusCut filtered dataset search from 30+ minutes to sub-second at 25–50M records
30+ min → sub-second filtered search; worst-case substring search 80s → ~1ms; flat to 50M records; zero new infrastructure, no new license
MongoDBSpring BootKubernetesAngular / PrimeNGOpenSearch (evaluated)