I am
Leonardo Lopes

Healthtech product for early breast-cancer detection using AI, mobile diagnostics, and secure clinical workflows. Led modernization of a live system for thousands of users: zero-downtime migration from a monolith to Go and Node.js/TypeScript microservices, micro frontends, and React Native. Cut cloud cost by about 59% while improving performance and reliability. Introduced OpenTelemetry for tracing, metrics, and security visibility; defined infrastructure as code with Terraform. Built React Native native bridges in Kotlin to integrate external diagnostic hardware.

National pricing platform for the world’s largest dairy company (85+ countries, USD 17B+ turnover), supporting the pricing team across all 27 Brazilian states with regional tax and commercial rules for accurate, auditable national pricing. Node.js, TypeScript, and full-stack collaboration in a large enterprise, domain-driven context.

One of Brazil’s largest beverage companies ($4B+ annual revenue, 700k+ customers), where a mobile app drives about 97% of revenue. Built an internal web platform for managers and supervisors to streamline operations. Cut main app load time by about 50% and reduced resource use by about half on critical paths; improved latency, stability, and mobile UX for high-volume B2B field sales. Stack: React, React Native, and Node.js.

Web and mobile clients for a custom internal gamification platform at a global pharmaceutical company (130+ years, 140+ countries). Delivered the project in about half the estimated time with near-zero production defects. Integrated statistical insights for data-driven decisions and supported internal engagement aligned with company strategy.