At Eumedical, the main client in my freelance work, I refactored a React and TypeScript healthcare platform using Feature-Sliced Design and hexagonal principles. I also optimized PostgreSQL and row-level security, cutting an API response time from ~14 seconds to ~4 seconds.
I added Supabase Edge Functions, webhooks and Twilio video calls for authenticated and guest users. I also added unit and Playwright end-to-end tests to CI/CD and coordinated work in a four-person team.
At the United Nations International Computing Centre, I built three bare React Native projects, handling navigation, authentication, state management and API integrations. I integrated biometric SDKs and Hyperledger Aries identity workflows with Askar-backed secure storage, and maintained three production apps.
Earlier, I delivered React Native features at Elements and Reappciona, contributing to Java backend development at Reappciona. My other work included AngularJS applications, Java backend maintenance, Salesforce, PHP and SQL; I also taught systems security, vulnerabilities and monitoring at Centro de Enseñanza San Roque.
