Ganna Grybova

I've built and maintained high-load, real-time distributed backend systems at Betinvest, processing betting data, financial risk calculations, and user data on the Erlang/OTP platform.

I designed a unified microservice that consolidated legacy betting-statistics and financial-risk systems, reducing complexity and redundant infrastructure. I also implemented RabbitMQ-based real-time processing, federation across clusters, and HTTP APIs for internal platforms.

My work includes improving user-data services through phone registration, password recovery, PostgreSQL test-database templating that cut CI execution time by about 40%, and AWS IAM role-based access. I've added Prometheus metrics and Grafana dashboards to support proactive service monitoring.

I focus on fault-tolerant OTP services, supervision trees, reliable message delivery, and stability under heavy load. I've also tested RabbitMQ publisher confirms under packet loss and network failures using Docker-based environments.