John Matzavrakos

Led two product teams (Pricing; Invoicing & Billing Infrastructure) of 12 engineers and cross-functional partners, onboarding 100% of clients to New Prepaid Billing and delivering global features that increased enterprise CSAT by 36%. Oversaw pricing, billing, and invoicing systems used by 35K+ B2B and enterprise clients in 150+ countries, processing >$1 billion in ARR.

Led a product team to deliver discovery-to-market features for travel SaaS, redesigning flight search UX and hotel API integrations that reduced abandonment by 40%.

Led Integrations & Extensibility team managing 100+ integrations, contributing >25% of €20m ARR and launching features that reduced API error revenue-blocking events by 73% and cut churn by 14%.

Led Greece product team for Papaki and Top.Host brands, executing a 2022 product strategy that increased ARR by 10%, grew net sales by 23%, and improved web app performance by 230–400%.

Co-founded and led product development, growing cumulative YoY revenue 500% and launching B2B hosting/SaaS offerings that increased ARR by 230% and CLV by 80%.

Co-founded VR event ticketing startup, led product discovery and achieved top KPIs leading to exhibitions at Mobile World Congress and The Next Web.

Reformed product strategy to focus on B2B, increasing B2B revenue by 32% and reducing B2B churn by 48%.

Completed an Executive Master of Business Administration with specialisations in Advanced Corporate-Level Strategy, Startup Entrepreneurship, and Strategic Thinking.

Hold a Bachelor of Science in Communication & Computer Systems earned at Lancaster University.