Since 2021, building practical experience in Mobile and Full-Stack Software Development, with a strong focus on React Native, TypeScript, Expo, backend services, and scalable product architecture.

If my journey were a flow, it would be: Front-End Development → React Native → Full Stack Mobile → Product-Oriented Mobile Engineering.

I work where mobile experience, backend services, data, and product decisions need to connect to turn ideas into reliable, scalable, and maintainable applications. From multi-tenant SaaS solutions to AI integrations, I bridge the gap between product, performance, and engineering.

📱 Mobile Engineering & Performance:

• Production-grade mobile client architecture using React Native, TypeScript, and Expo (SDK 57).
• Navigation re-architecture with Expo Router, replacing rigid public/private barriers with contextual universal app shells (enabling high-conversion Guest Mode browsing).
• UI performance optimization with Shopify FlashList, React Native Paper, and strict boundary enforcement via dependency-cruiser to eliminate circular dependencies.
• Native hardware capabilities: Zero-cost Text-to-Speech (Expo Speech) and complex i18n localization across 5 languages, including RTL (Hebrew/Arabic).

⚙️ Backend, Security & Privacy-by-Design:

• Serverless backends powered by Supabase, PostgreSQL, and Edge Functions (Deno).
• Database-level security with granular Row-Level Security (RLS) policies, immutable audit logs (user_legal_consents), and session encryption.
• Regulatory compliance engineering (LGPD, Marco Civil, ECA Digital): automated account deletion pipelines segregating user data purges from mandatory 6-month statutory retention logs.

💳 Monetization, Identity & Cost Optimization:

• In-App Purchases (IAP) with RevenueCat: dynamic localized paywalls, customer centers, and HMAC-verified serverless webhook handlers for server-side entitlement mutations.
• Just-in-Time Biometric KYC (+18): Didit identity verification triggered exclusively at Paywall checkout, shielding unit economics against bot spam and avoiding unnecessary verification costs (R$ 1.85/check) on non-paying users.

🤖 AI Engineering & Spec-Driven Development (SDD):

• Automated data extraction & ETL pipelines leveraging the Gemini API and Node.js.
• Enforced Spec-Driven Development (SDD) frameworks and behavioral AI agent guardrails (.agents/rules/) with strict Definitions of Done to eliminate architectural drift.

🎓 Education & Certifications: • Degree in Systems Analysis and Development — Universidade Estácio de Sá

• English: B2 Upper-Intermediate (EF SET Certified)

🛠️ Core Stack & Technical Keywords: React Native • TypeScript • Expo • Expo Router • Supabase • PostgreSQL 17 • Node.js • RevenueCat • Didit KYC/KYB • Edge Functions • Row-Level Security (RLS) • REST APIs • AI APIs • Spec-Driven Development (SDD)

React Native Developer | Mobile Software Engineer | Full-Stack Mobile Engineer