Serg Bash

I’m a Senior Java Developer with 10+ years building high-performance backend systems across Banking & Finance and Telecommunications. I’ve architected payment processing platforms handling 2M+ daily transactions, built data virtualization engines integrating 200+ data sources, and developed telecom aggregator hubs serving 5M+ subscribers.

I focus on measurable performance and reliability: I’ve reduced system latency by 40x, improved deployment speed by 50%, and driven major throughput gains (e.g., +35% for complex federated queries). I’ve also lowered risk with comprehensive unit/integration test coverage and disciplined code reviews, including reducing regression defect rates by 40%.

Across roles, I design and deliver backend services with Java, Spring Boot, microservices, and robust API layers (REST & SOAP). I mentor engineering teams of 3-5 developers, partner closely with QA/product to resolve customer issues within SLA targets, and use approaches like CI/CD automation, TDD/JUnit, and strong data/query modeling to ship dependable systems.