Jose Raul Alfaro

Senior Full Stack Developer, Backend Architect and AI Engineer building production systems where scalable software architecture meets LLMs, RAG, agents and automation. Senior Full Stack Developer, Backend Architect y AI Engineer construyendo sistemas en produccion donde arquitectura de software escalable se une con LLMs, RAG, agentes y automatizacion.

10+ years delivering backend, cloud, web and mobile products from architecture to production, including backend leadership, APIs, microservices and databases. 3+ years designing AI systems with LLMs, RAG, MCP servers, embeddings, vector databases, observability and agentic workflows. 10+ años entregando productos backend, cloud, web y mobile desde arquitectura hasta produccion, incluyendo liderazgo backend, APIs, microservicios y bases de datos. 3+ años disenando sistemas AI con LLMs, RAG, MCP servers, embeddings, bases vectoriales, observabilidad y flujos agenticos.

Experience Experiencia

Advision

Full Stack Developer / Software Architect / AI Engineer

2019 - Present

Own architecture and delivery for backend, cloud and AI-enabled product work, combining years of backend leadership with hands-on development across APIs, databases, microservices, AWS infrastructure and production systems. Worked as Backend Lead and Backend Architect, developing product features, maintaining business-critical services and later building RAG, MCP and automation solutions for sports betting, SEO content generation and internal operations. Responsable de arquitectura y entrega de soluciones backend, cloud y productos con AI, combinando años de liderazgo backend con desarrollo hands-on en APIs, bases de datos, microservicios, infraestructura AWS y sistemas en produccion. Trabaje como Backend Lead y Backend Architect, desarrollando features de producto, manteniendo servicios criticos de negocio y posteriormente construyendo soluciones RAG, MCP y automatizaciones para sports betting, generacion de contenido SEO y operaciones internas.

Led backend architecture and maintenance across multiple services, databases and APIs, supporting scalable product features and reliable production delivery. Lidere arquitectura backend y mantenimiento de multiples servicios, bases de datos y APIs, soportando features escalables y entregas confiables en produccion.
Architected and developed AI systems with LlamaIndex, custom MCP servers, PostgreSQL vector search, GraphQL integrations, Phoenix observability, DeepEval evaluation and NeMo Guardrails. Arquitecte y desarrolle sistemas AI con LlamaIndex, MCP servers custom, busqueda vectorial en PostgreSQL, integraciones GraphQL, observabilidad con Phoenix, evaluacion con DeepEval y guardrails con NeMo Guardrails.
Automated business workflows with n8n, OpenAI, Firecrawl and Node.js, replacing manual sports event management processes with reliable validation and database operations. Automatice workflows de negocio con n8n, OpenAI, Firecrawl y Node.js, reemplazando procesos manuales de gestion de eventos deportivos con validacion y operaciones de base de datos confiables.
Selected projects: AI Chatbot, SEO Content Generator and Sports Event Automation. Proyectos destacados: AI Chatbot, SEO Content Generator y Sports Event Automation.

Malt.com

AI Engineer Consultant

2026 - Freelance AI consulting project 2026 - Proyecto freelance de consultoria AI

Designed and implemented internal AI agents for enterprise knowledge retrieval and report discovery, taking ownership of RAG architecture, ingestion, retrieval strategy, evaluation and integration through a custom MCP server. Disene e implemente agentes AI internos para recuperacion de conocimiento empresarial y descubrimiento de reportes, tomando ownership de la arquitectura RAG, ingesta, estrategia de retrieval, evaluacion e integracion mediante un MCP server custom.

Built ingestion pipelines for Tableau, Power BI, internal documents and SharePoint using Microsoft Graph API, LLM enrichment, OpenAI embeddings and Milvus. Construi pipelines de ingesta para Tableau, Power BI, documentos internos y SharePoint usando Microsoft Graph API, enriquecimiento con LLMs, embeddings de OpenAI y Milvus.
Implemented hybrid search combining semantic similarity and tag-based retrieval, with LangChain as the main framework and Langfuse for observability and evaluation. Implemente busqueda hibrida combinando similitud semantica y retrieval por tags, usando LangChain como framework principal y Langfuse para observabilidad y evaluacion.
Selected project: Internal Reporting & Knowledge Agents. Proyecto destacado: Internal Reporting & Knowledge Agents.

Workana.com

Freelance Developer

2015 - 2018

Delivered end-to-end client products as an independent full stack developer, covering requirements, UX/UI, mobile development, backend services, database modeling, API design, deployment support and third-party integrations. Entregue productos end-to-end para clientes como desarrollador full stack independiente, cubriendo requerimientos, UX/UI, desarrollo movil, backend, modelado de base de datos, diseno de APIs, soporte de despliegue e integraciones con terceros.

Built production mobile and web applications for booking, business management, loyalty rewards, delivery commerce and academic tracking. Construi aplicaciones moviles y web en produccion para reservas, gestion de negocios, fidelizacion, delivery commerce y seguimiento academico.
Integrated Google Maps, social login, push notifications, QR flows, payment/order logic and REST APIs across Android, iOS and web experiences. Integre Google Maps, social login, push notifications, flujos QR, logica de pagos/pedidos y REST APIs en experiencias Android, iOS y web.
Selected projects: YourBeauty, EcoVen, Bar2me and VIA. Proyectos destacados: YourBeauty, EcoVen, Bar2me y VIA.

Smartsoft

PhoneGap Developer

2014

Worked on a PhoneGap-based mobile application, improving usability, stability and maintainability while strengthening the foundation for later cross-platform mobile and full stack delivery work. Trabaje en una aplicacion movil basada en PhoneGap, mejorando usabilidad, estabilidad y mantenibilidad, y fortaleciendo la base tecnica para mi posterior experiencia en desarrollo movil multiplataforma y full stack.

Gained early production experience with hybrid mobile applications, HTML, CSS, JavaScript and mobile app maintenance. Gane experiencia temprana en produccion con aplicaciones moviles hibridas, HTML, CSS, JavaScript y mantenimiento de apps moviles.

Projects Proyectos

AI Projects Proyectos AI

Production RAG systems, agentic workflows and automation platforms. Sistemas RAG en produccion, flujos agenticos y plataformas de automatizacion.

Advision AI Architect & Developer

AI Chatbot

Intelligent sports betting chatbot that answers questions about betting lines, predictions, best bets, team performance, weather, statistics and real-time play-by-play context. Chatbot inteligente de sports betting que responde sobre lineas de apuestas, predicciones, mejores apuestas, rendimiento de equipos, clima, estadisticas y contexto play-by-play en tiempo real.

Python
LlamaIndex
MCP
RAG
PostgreSQL
GraphQL
Phoenix
DeepEval

Malt.com AI Engineer Consultant

Internal Reporting & Knowledge Agents

Two internal RAG agents for report discovery and company knowledge retrieval, orchestrated through a shared MCP server and a main LLM tool-as-agent chat experience. Dos agentes RAG internos para descubrir reportes y recuperar conocimiento corporativo, orquestados con un MCP server compartido y un chat principal con enfoque tool-as-agent.

Python
LangChain
MCP
Milvus
Hybrid Search
Langfuse
Microsoft Graph

Advision AI Architect & Developer

SEO Content Generator

RAG platform that generates daily SEO content for sports event pages using customizable rules, contextual MCP tools, validation, retries and low-latency cloud jobs. Plataforma RAG que genera contenido SEO diario para paginas de eventos deportivos usando reglas customizables, tools MCP contextuales, validacion, reintentos y jobs cloud de baja latencia.

Python
LlamaIndex
MCP
RAG
PostgreSQL
Embeddings
Phoenix

Advision Automation Architect & Developer

Sports Event Automation

n8n automation that replaced a manual sports event maintenance process, finding events online, validating database state and creating, editing or removing records. Automatizacion con n8n que reemplazo un proceso manual de mantenimiento de eventos deportivos, buscando eventos online, validando base de datos y creando, editando o eliminando registros.

n8n
OpenAI
Firecrawl
MCP
MSSQL
Node.js
JavaScript

Freelance Projects Proyectos Freelance

End-to-end mobile, web, backend and deployment work for client products. Desarrollo end-to-end movil, web, backend y despliegue para productos de clientes.

Workana.com Full Stack & Mobile Developer

YourBeauty Ecosystem

Multi-application beauty service ecosystem with customer booking, center administration and staff agenda management across mobile and web products. Ecosistema multiaplicacion para servicios de belleza con reservas de clientes, administracion de centros y gestion de agenda del staff en movil y web.

Ionic
Angular
Node.js
MySQL
Google Maps
FCM
APNS

Workana.com Full Stack & Mobile Developer

EcoVen

Sustainability rewards mobile app where users scan QR codes, earn eco-points, browse promotions, redeem benefits and track activity and ecological impact. App movil de recompensas sostenibles donde usuarios escanean QR, ganan ecopuntos, consultan promociones, canjean beneficios y revisan actividad e impacto ecologico.

PhoneGap
PHP
MySQL
JavaScript
HTML5
CSS3
REST API

Workana.com Full Stack & Mobile Developer

Bar2me

Mobile commerce and delivery app for beverages, snacks and products, including catalog browsing, cart, delivery address, payments, maps and notifications. App movil de comercio y delivery para bebidas, snacks y productos, con catalogo, carrito, direccion de entrega, pagos, mapas y notificaciones.

PhoneGap
PHP
MySQL
JavaScript
Google Maps
Push Notifications

Workana.com Full Stack & Mobile Developer

VIA

Academic mobile platform for students to access progress, grades, attendance, modules, evaluations, professors and thesis status from Android and iOS. Plataforma movil academica para que estudiantes consulten progreso, notas, asistencia, modulos, evaluaciones, profesores y estado de tesis en Android e iOS.

Ionic
PHP
MySQL
HTML5
CSS3
FCM
APNS

AI and RAG Solutions

LLMs, embeddings, vector databases, semantic search

Built RAG systems, multi-agent workflows, OpenAI integrations, sentiment detection and knowledge retrieval tools. Construí sistemas RAG, flujos multiagente, integraciones OpenAI, deteccion de sentimiento y herramientas de recuperacion de conocimiento.

Backend and Cloud Architecture

APIs, microservices, databases, AWS

Designed scalable backend systems and cloud services for business-critical applications. Disene sistemas backend escalables y servicios cloud para aplicaciones criticas de negocio.

Web and Mobile Applications

React, React Native, PhoneGap, third-party APIs

Delivered custom applications from scratch, integrating SDKs, APIs and external services. Entregue aplicaciones a medida desde cero, integrando SDKs, APIs y servicios externos.

Skills Habilidades

AI Engineering

Production RAG, agents, retrieval, evaluation and LLM application architecture. RAG en produccion, agentes, retrieval, evaluacion y arquitectura de aplicaciones con LLMs.

RAG
LLM Engineering
Agentic AI
OpenAI APIs
LlamaIndex
LangChain
LangGraph
MCP
Embeddings
Vector Databases
Semantic Search
Hybrid Search
Phoenix
Langfuse
DeepEval
NeMo Guardrails

Backend & Architecture

Backend leadership, API design, services, integrations and production ownership. Liderazgo backend, diseno de APIs, servicios, integraciones y ownership en produccion.

Node.js
Python
TypeScript
JavaScript
GraphQL
REST APIs
Microservices
System Architecture
API Integrations
Data Processing
MCP Server Development

Frontend & Mobile

Full stack delivery for web, hybrid mobile and cross-platform applications. Entrega full stack para web, mobile hibrido y aplicaciones multiplataforma.

React
React Native
Angular
Ionic
HTML5
CSS3
PhoneGap
Mobile UX
Push Notifications

Cloud, Data & Automation

Databases, cloud services, vector storage, workflow automation and data ingestion. Bases de datos, cloud, almacenamiento vectorial, automatizacion e ingesta de datos.

AWS
Google Cloud
Docker
Kubernetes (K8s)
PostgreSQL
PostgreSQL Vector Search
Milvus
MSSQL
MySQL
MongoDB
Elasticsearch
Redis
n8n
Make
Firecrawl
Microsoft Graph API
ETL Pipelines

Education Educacion

2026 Master's Degree Master

Big Data and Business Intelligence Big Data y Business Intelligence

Advanced data, analytics and decision intelligence foundation that complements production AI, RAG and backend architecture work. Base avanzada en datos, analitica e inteligencia de decision que complementa mi trabajo en AI, RAG y arquitectura backend en produccion.

Data
Analytics
BI
AI Systems

2010 - 2014 Bachelor's Degree Ingenieria

Systems Engineering Ingenieria de Sistemas

Software engineering foundation for system design, databases, programming, architecture and full stack product development. Base de ingenieria de software para diseno de sistemas, bases de datos, programacion, arquitectura y desarrollo full stack.

Software Engineering
Systems Design
Databases
Full Stack

Focus Foco

10+ years

Full Stack Developer

End-to-end delivery across backend, web, mobile, APIs, databases and production systems. Entrega end-to-end en backend, web, mobile, APIs, bases de datos y sistemas en produccion.

Backend / Cloud

Software Architect

Architecture ownership for services, integrations, cloud infrastructure and business-critical platforms. Ownership de arquitectura para servicios, integraciones, infraestructura cloud y plataformas criticas.

3+ years

AI Engineer

Production AI systems with LLMs, RAG, MCP servers, embeddings, vector databases and observability. Sistemas AI en produccion con LLMs, RAG, MCP servers, embeddings, bases vectoriales y observabilidad.

LLMs / Agents

RAG Engineer

Agentic retrieval workflows, hybrid search, ingestion pipelines and knowledge automation. Workflows agenticos de retrieval, busqueda hibrida, pipelines de ingesta y automatizacion de conocimiento.