Ramón Chancay is a full-stack web and mobile developer based in Guayaquil, Ecuador, with over 13 years of professional experience shipping production software. He specializes in React, Next.js, React Native, and AI-augmented products including RAG systems, LLM integrations, and conversational agents. Since 2019 he has worked as an independent contractor serving 50+ clients across Ecuador, the United States, Spain, and Mexico — fully remote. He is Top Rated on Upwork with 100% Job Success. His shipped projects span SaaS platforms, streaming services, hospital management systems, health apps, and AI agent platforms. He has led mobile development teams, owned booking implementations and code reviews for international clients, provided architecture consulting for the redesign of Diario El Universo's web platform, and maintained react-rainbow-components, an open-source component library. His engineering practice includes code review, unit and end-to-end testing, structured outputs, and LLM evals. He is available for long-term full-stack engagements and can be reached at hola@ramonchancay.me.
Fast, accessible, maintainable web platforms. I design the architecture, build the front-end and wire the backend — from idea to production deploy.
Mobile apps that feel native on iOS and Android from a single codebase. I cover the full cycle: product, build, OTA updates and store releases.
LLMs applied to real product, not demos. I integrate OpenAI, Anthropic and Gemini models with your data and flows — with a focus on cost, latency and evaluation.
More than a decade shipping product across web, mobile and AI left me something more valuable than a stack: judgment. If your team is stuck on a technical decision, evaluating a stack, or wants a second opinion before sinking months into a direction — let's talk.
