Vladyslav Pieno

I am a Middle Golang backend developer with 2+ years of hands-on experience building high-load, reliable systems and scalable architectures. I specialize in Go (Gin), PostgreSQL performance tuning, Redis deduplication, and designing services to handle thousands of requests per second.

At Quantum Level I implemented a high-performance Ad Click & Conversion Tracking service, reduced API latency from ~300ms to 40–50ms, improved PostgreSQL throughput 4x with batching and prepared statements, and solved duplicate-event issues by building a Redis-based deduplication mechanism that cut duplicates from ~8% to 0.1%.

I prioritize pragmatic engineering: clear architecture, automated testing, observability, and resilient infrastructure. I mentor junior engineers, contribute to architectural decisions, and seek roles where I can continue improving system reliability and performance while collaborating in a DevOps-aware team.