Denis Vasilchenko

Background

About Denis Vasilchenko

QA Lead / Senior QA Engineer (hands-on) with 15+ years of experience building and scaling quality for enterprise-grade products used by hundreds of corporate clients across Europe, Scandinavia, and Africa.I specialize in building QA functions from scratch and transforming them into structured, scalable, and data-driven quality systems. My core strength is combining leadership with deep hands-on expertise - I don’t just define strategy, I actively work with testing, automation, and system analysis.Over the past 15+ years, I have grown from the first QA engineer in the company to leading international QA teams and owning quality across the full SDLC - from product design to production. I built QA processes, test automation frameworks (API + UI), test infrastructure, and quality metrics systems that significantly reduced defect leakage and improved release predictability.I work at the intersection of QA, engineering, and architecture. I collaborate closely with development teams on system design, integrations, and performance, influencing product quality early in the lifecycle. I have strong experience with distributed systems, API integrations, DWH (MS SQL), and large-scale data processing, including performance testing and bottleneck analysis.Beyond QA, I have led cross-functional initiatives - including integration architecture projects, secure development processes (ISO 27001 / SOC1), and a full-scale transformation of client upgrade processes. These initiatives improved system reliability, operational efficiency, and customer satisfaction across enterprise clients.I have built and managed international QA teams (up to 10 engineers), led hiring, mentoring, performance management, and established a strong engineering culture focused on ownership and measurable results.What I bring:End-to-end QA ownership (strategy → execution → results)Strong hands-on expertise (manual + automation + analysis)Proven experience in building QA processes from zeroDeep understanding of complex enterprise systems and integrationsData-driven approach to quality (KPIs, metrics, dashboards)Roles I am open to:QA Lead / Senior QA Engineer / QA Team Lead / Test Manager / Head of QAOperative communication with me:Email: denis.v.dv74@gmail.com