David Alejandro González Robles

Cross-platform mobile productivity app (iOS & Android) built with React Native, Firebase backend, and Stripe payment integration. Serves 800+ active users across LATAM, USA, and Spain with time management tools, habit tracking systems, and financial goal monitoring—featuring real-time data synchronization, secure payment processing, and cloud-based user authentication.

Complete agency management platform built with Next.js 15, TypeScript, Supabase, and Stripe. Features public landing page with services showcase and contact forms, client portal for project tracking and subscription management, and admin dashboard for managing clients, projects, and content. Includes automated billing, email notifications with Resend, PWA capabilities, and SEO optimization.

Full-stack learning management system (LMS) and consultancy booking platform built with React 18 + Vite, Firebase backend (Auth, Firestore, Functions, Storage), and Stripe payment integration. Features progressive course modules with exercises, consultancy service marketplace, admin dashboard with sales analytics, real-time appointment scheduling, and secure payment processing for animal connection education services.

Multi-tenant SaaS platform for nutritionists built with Next.js 15, TypeScript, Supabase (PostgreSQL + RLS), Stripe, and Resend. Enables multiple nutritionists to run independent websites from shared infrastructure with complete data isolation. Features customizable landing pages, interactive calculators (BMI, calories, water), admin CRM for client management, downloadable resources library, integrated blog, email marketing, Stripe payment processing, and tier-based feature limitations—serving multiple active clients with separate deployments and personalized branding.

Real-time cryptocurrency price tracking application integrating CryptoCompare API with multi-currency support (USD, EUR, MXN, GBP, JPY, CAD). Built with vanilla JavaScript ES6+, Skeleton CSS framework, and advanced CSS animations, featuring 20+ crypto pairs, instant search with autocomplete, detailed market data (price, volume, market cap), and PWA capabilities for native-like experience.