Oleh Chonka

I'm the sole backend engineer on a greenfield FinTech analytics platform: Java 21, Spring Boot, GCP, PostgreSQL, plus LangChain and LangGraph for AI-driven analysis. I own the architecture, cloud setup, REST APIs, automated testing and delivery.

Before that I ran high-load distributed services for a European iGaming operator, holding 60,000-200,000 requests per second in peak against a 99.9% availability target, with ELK and DataDog dashboards built to keep incident time predictable.

At a market-data provider I built analytics-platform infrastructure and a custom Kafka producer tool that cut QA cycles by 40%, and streamlined delivery with GitLab CI and Terraform.

My background also covers core banking services for a European financial institution, an HR platform serving thousands of users, and a workbook platform for testing ML models in healthcare analytics. I also built a floral eCommerce platform from scratch, Spring services with React and Next.js interfaces.

I enjoy simplifying complex problems into parts a team can ship, designing durable architecture, and applying AI where it creates practical product value.