Karen G.

Hi, I'm Karen 👋 I am a Fullstack Developer with nearly 5 years of experience specializing in building secure, high performance web applications and transforming non technical business requirements into production ready software. I bridge the gap between business ideas and clean code. My core expertise lies in designing robust Frontend architectures, optimizing BFF layers, and implementing bulletproof API security validations. 🌍 I speak: Spanish (Native), English (Fluent). 🤖 I use: Claude Code, Cursor, Git, Orval. ⭐ Highlights ↳ Enterprise-Grade Experience: Developed and deployed fullstack internal tools and SaaS applications for major brands like Glovo and Seat. ↳ Security & Architecture: Served as the team "Security Hero," implementing advanced authentication, authorization, and secure middleware patterns at the BFF level. ↳ AI-Accelerated Workflows: Expert in "vibe-coding" and AI-assisted development (Claude Code/Cursor), building custom commands and automation skills to streamline feature creation and automate Pull Requests. ↳ Complex Data Ingestion: Architected a highly complex, multi-service Communication Center handling enterprise-scale emails, SMS, and push notifications. ↳ Migration & Legacy Modernization: Successfully analyzed, re-architected, and migrated AI/Supabase MVPs into strict, secure enterprise company ecosystems. ↳ Advanced Form & Data Validation: Specialist in building complex, dynamic user inputs backed by rigorous Zod schema validations to ensure total data integrity before reaching the database. 🧠 Skills & Tools ↳ Frontend: React, Next.js, TypeScript, Tailwind CSS, Dynamic Forms (React Hook Form + Zod), Micro-Frontends (MFE). ↳ Backend & API Design: Node.js, BFF Pattern, API Client Generation (Orval), REST APIs integration, Middleware Security. ↳ Databases & Tools: Supabase, PostgreSQL, Enterprise Auth Systems, Google Workspace APIs. ↳ AI & Automation: Custom AI-assisted development workflows, prompt engineering for codebase migrations, PR automation. 🚀 Featured Projects ↳ Enterprise Communication Center Developed the Fullstack architecture (FE, BFF, and Middlewares) for a massive internal platform coordinating multi-channel communications (SMS, Email, Push Notifications) across multiple corporate departments. ↳ B2B Performance Evaluation SaaS Built an agile worker-ranking SaaS application from scratch for an enterprise client, creatively leveraging automated spreadsheet databases to deliver a fast, functional solution within tight constraints. ↳ AI MVP Enterprise Migration Analyzed a prototype built with AI and Supabase, redesigned its architecture, and successfully migrated the entire infrastructure to align with a major corporation's internal security and database ecosystem. If you need a developer who can understand your business goals, write secure code, find hidden bugs in your APIs, and use the latest AI workflows to build your app faster, let’s talk. 🤝