Yevgeniy Pak

I’m a Senior Backend Engineer and Team Lead with 6+ years building high-load distributed systems for fintech, blockchain, and real-time products serving millions of users. I’m driven by solving complex engineering problems through scalable architecture, performance optimization, and AI-assisted development.

At GoMining, I lead backend development of Miner Wars, GoMining’s highest-load Node.js platform serving 2M+ users with low-latency, highly available microservices. I redesigned the BTC rewards calculation flow, reducing processing time by 4.4x (22h → 5h) using parallel processing, memory optimization, and fault-tolerant execution.

I also help build GoMining Enterprise, a Node.js B2B white-label Bitcoin mining platform for enterprise partners. Beyond core services, I architected multi-asset payment infrastructure supporting BTC, USDT, and GMT, designed PostgreSQL pipelines processing 5B+ records, and built resilient webhook delivery while introducing gRPC communication across microservices.

In addition to delivery, I focus on reliability and operational excellence—like eliminating PostgreSQL I/O bottlenecks on a 2 TB production database by migrating storage from SATA SSD to NVMe, improving responsiveness and reducing production incidents. Across my work, I leverage strong observability and DevOps practices with tools like Prometheus, Grafana, OpenTelemetry, Docker, and Kubernetes to keep systems stable as they scale.