Cesar — Web Development freelancer in Santa Teresa del Tuy

Top-Rated Frontend Developer with 4+ years building modern, scalable web applications — from SaaS platforms and business systems to data-heavy dashboards and interactive maps. I recently contributed to Atlas, the core platform of an international biodiversity intelligence company, integrating 20k+ environmental datasets into interactive visualizations, building a real-time Mapbox map, and implementing advanced API patterns with React Query — within a structured corporate team and agile workflow. Other highlights from my work: · Accounting platform with authentication, role management, API integration, and dynamic data visualization · Full web app for a government Ministry of Energy — optimized for accessibility, performance, and responsive design · Complete business system with real-time states, complex form handling (Zod\u002FYup), and custom context architecture · Multiple corporate landing pages from Figma to pixel-perfect, SEO-friendly production When a project needs backend too, I can cover it — I've built and deployed serverless functions on AWS Lambda (Python) with API Gateway and DynamoDB. Core stack: React · Next.js · TypeScript · TailwindCSS · React Query · Mapbox GL · ApexCharts · AG Grid · Material UI · Ant Design · ShadCN · AWS · Supabase · Figma I work with AI-assisted workflows (Cursor + Claude) to move faster without cutting corners — cleaner code, quicker iterations, more focus on what actually matters. Reliable, communicative, and experienced working remotely with international teams. That's why I've maintained 100% Job Success on Upwork. If your project involves complex UI, API integrations, or data visualization — let's talk.