Luan E.

I'm a senior full-stack developer with a frontend focus and a strong Ruby on Rails background. I build web applications with React, Vue, and JavaScript/TypeScript, along with the APIs and backend systems that support them. My focus is on responsive interfaces, usability, reusable components, and complete application flows. I also work across Rails backends, PostgreSQL databases, background jobs, and integrations. What I can help with: - Frontend development, dashboards, forms, and responsive websites. - Full-stack Ruby on Rails applications and backend development. - API integrations, webhooks, CRM workflows, and Node.js services. - AI features using the OpenAI API, Vercel AI SDK, or LangChain, including assistants, document processing, and automation. - Debugging, performance improvements, and maintaining existing applications. Recent work includes multi-tenant Rails systems, AI-assisted product features, secure document-upload validation, and a browser-based terminal inside Coolify. I'm also a WordPress specialist. My completed Upwork work includes custom PHP plugin extensions, API integrations, Shopify development, and website builds. I use AI-assisted development alongside automated tests, end-to-end checks, and manual review. I take responsibility for the implementation and final delivery. For larger or unfamiliar systems, I start with discovery and a small proof, then agree on implementation milestones. I work best with clear deliverables, written updates, and short recorded walkthroughs.