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Achievements

Achievement: Pair Extraordinairex2Achievement: YOLOAchievement: QuickdrawAchievement: Pull Sharkx4Achievement: Arctic Code Vault Contributor

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@Noders @javascriptecuador

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devrchancay/README.md

Hi, I'm Ramón Chancay 👋

Web & Native Developer · AI Enthusiast · Top Rated on Upwork

📍 Guayaquil, Ecuador  ·  🌎 Working with clients across the US, Spain & LATAM

Website Upwork LinkedIn dev.to X

🚀 About me

Full-stack web & mobile engineer with 13+ years building and shipping products with React, Next.js, Astro, React Native & Expo. I turn Figma into responsive, accessible, production-grade interfaces and ship them all the way to the App Store and the web.

For the last few years my focus has been AI engineering — building real, in-production features on top of LLMs: RAG pipelines, conversational agents, vector search, and AI-native product flows that users actually rely on.

  • 🟢 100% Job Success · Top Rated on Upwork
  • 💼 Software Engineer at Desarol since 2019
  • 🧠 Shipping AI-native apps with Next.js · Expo · Supabase · Anthropic / OpenAI
  • 🗣️ Bilingual (EN / ES) — and a former conference speaker

🤖 AI Engineering

I don't just call an API — I architect AI features that hold up in production.

  • RAG & Knowledge Bases — chunking, embeddings, vector search and retrieval that stays grounded and cited.
  • Conversational Agents — multichannel assistants (chat, voice, WhatsApp, web embeds) with memory, tools and analytics.
  • LLM Integration — OpenAI, Anthropic (Claude) & Gemini via the Vercel AI SDK and LangChain; streaming, structured output and tool calling.
  • AI-native Products — AI-generated reports, coaching, document analysis & dispute-letter generation, all shipped to real users.
LLMs   ·   RAG   ·   Embeddings   ·   Vector Search   ·   Agents
OpenAI   ·   Anthropic / Claude   ·   Gemini   ·   Vercel AI SDK   ·   LangChain

🛠️ Tech Stack

Web   React Next.js Astro TypeScript Tailwind CSS

Mobile   React Native Expo Swift Kotlin

AI & Data   OpenAI Anthropic Gemini LangChain  ·  RAG · Embeddings · Vector Search

Backend & Tools   Node.js NestJS PostgreSQL Supabase MySQL Firebase

💼 Experience

Role Company Period
Software Engineer Desarol 🇺🇸 Aug 2019 – Present
Lead React Native Developer Tropical House Records 🇪🇸 Mar 2024 – Feb 2025
Senior Full Stack Mobile Developer NativApps Inc. 🇺🇸 Jul 2022 – Feb 2024
Senior Software Consultant Diario El Universo 🇪🇨 May 2020 – Jan 2021
Senior Frontend Developer Atexto 🇲🇽 Mar 2020 – Oct 2020
Open Source Maintainer Nexxtway Dec 2019 – Dec 2020
Frontend Engineer EveryMundo 🇺🇸 Sep 2018 – Mar 2020
Full Stack Engineer Diario El Universo 🇪🇨 Jan 2015 – Nov 2018

⭐ Featured Projects

Project What it is Stack
Living Motions · 📱 Cross-platform personality app (Enneagram) with AI-generated reports & coaching Next.js · Expo · Supabase · Anthropic
Pet-Meet · 📱 Community platform to find lost pets — live map, push alerts & smart QR collars React Native · Expo · Fastify · Turborepo
Clona B2B platform for AI conversational agents with 3D avatars & vector search Next.js · Prisma · OpenAI · HeyGen
OTV GO Streaming & news platform — live TV, on-demand, shorts & news portal Next.js · Expo · Bunny CDN · RevenueCat
MagneTics Corporate site for a tech-services company, CMS-driven with SEO schema Astro · React · Sanity · Vercel
Torneos BSC Youth football tournament platform — live results, standings & galleries Astro · React · Sanity · TypeScript

👉 More work, case studies & the full project ledger at ramonchancay.me

✍️ From the blog

Voice agent that books appointments

AI · Voice agents
A voice agent that books appointments
ElevenLabs + Cal.com for 30-minute bookings — and why the Fastify backend is what keeps the model from inventing times. 		Data annotation jobs: labeling and reviewing AI responses

AI · RLHF
Data annotation jobs, explained
What labeling and reviewing AI responses actually involves, how it feeds RLHF, and how annotator quality gets measured.
Orca: orchestrating a fleet of coding agents in parallel

AI · Agents
Orca: a fleet of coding agents in parallel
Trying the open-source Agent Development Environment that runs a fleet of coding agents, each in its own isolated worktree. 		Model routing with OpenRouter and DeepSeek

AI · Cost optimization
Model routing with OpenRouter & DeepSeek
Routing models in production — DeepSeek for the bulk of traffic, premium models only where it matters. Lower cost, same quality.

📚 Read all posts →  ·  also on dev.to

AI engineering · automation · practical LLM work

🎤 Speaking

  • Publishing Your First npm Package — JavaScript Ecuador (Workshop, 2019)
  • Creating Components with Create React App — JavaScript Ecuador (Workshop, 2019)
  • JavaScript Web Technologies — Noders / SantiagoJS (Talk, 2019)
  • WordPress for Frontend Developers — WordCamp Guayaquil (Talk, 2019)

📊 GitHub

Followers Profile views Years coding Top Rated

📬 Let's build something

Hire me on Upwork  ·  hola@ramonchancay.me

Sharp, credible, crafted. The work makes the claim. ✨

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  1. elevenlabs-cal-demo elevenlabs-cal-demo Public

    Spanish-speaking voice agent that books Cal.com appointments. ElevenLabs Agents, a Fastify/TypeScript backend, and a custom WebRTC interface that shows the booking as it happens.

    TypeScript

  2. hermes-voice-jarvis hermes-voice-jarvis Public

    Talk to Hermes Agent with your voice, in any language. Native macOS SwiftUI app with a J.A.R.V.I.S.-style HUD, on-device STT/TTS, and zero external dependencies.

    Swift

  3. esco-components esco-components Public template

    (2022) ⚛️ Template for reusable components of React built with Typescript, jest, storybook

    JavaScript 1 2

  4. nexxtway/react-native-rainbow nexxtway/react-native-rainbow Public

    🌈 React Native Rainbow. Build your IOS and ANDROID application in a snap.

    TypeScript 18 3

  5. eluniverso/taller-de-js-basico eluniverso/taller-de-js-basico Public

    (2019) 👨‍🏫 Javascript workshop creating and publishing your first npm package.

    JavaScript 2 5

  6. eluniverso/taller-react-js eluniverso/taller-react-js Public

    (2019) 👨‍🏫Workshop, creating basic component with CRA and deploy in netlify

    JavaScript 2 5