Oleg Efimov

I’m a backend and infrastructure engineer with 3+ years of experience building high-load distributed systems and production-grade services using Go. I focus on scalability, reliability, and performance optimization, and I enjoy designing microservice architectures and asynchronous, event-driven systems that stay stable under real production load.

I combine backend engineering with DevOps expertise for end-to-end ownership—from service design to deployment, monitoring, and optimization. I’ve built and operated microservices deployed in Kubernetes and Docker, automated delivery with CI/CD pipelines, and improved operational outcomes through observability and alerting using Prometheus and Grafana.

Highlights include implementing API-level rate limiting and polling-friendly APIs to reduce unnecessary load, building production-ready infrastructure from early-stage setup, and optimizing database performance (PostgreSQL queries and execution plans). I also design secure multi-tenant backends (including PostgreSQL Row-Level Security) and build reliable workflows such as asynchronous processing, background tasks, and idempotent billing/payment handling.