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© 2026 Cristian Najera

Selected work

A curated selection of projects spanning AI agents, retrieval-augmented generation, data engineering, and MLOps.

9 projects
9 projects
Full-Stack Platform01

AI-Powered Analytics Dashboard

Real-time data visualization platform with machine learning insights for enterprise clients.

ReactPythonAWS
Search & Retrieval02

RAG Document Search Engine

Retrieval-augmented generation system enabling semantic search across millions of enterprise documents.

LangChainOpenSearchPython
Enterprise RAG03

Enterprise RAG Pipeline with Azure AI Search Citations

Built a retrieval-augmented generation system on Azure AI Search that extracts page-number citations at query time — no re-indexing required — achieving 94% citation accuracy across enterprise document collections.

RAGAzure AIPythonGPT-4o
Document Validation04

Document Validator — Agentic Self-Critique Loop

Built an agentic document validation system for Scoop using LangGraph and GPT-4o, achieving 97% validation accuracy through a self-critique loop and parallel batch processing.

LangGraphGPT-4oPythonStreamlit
Data Engineering05

Production Data Engineering Pipeline

Replaced daily S3 batch ingestion with a near-real-time AWS streaming pipeline, cutting end-to-end latency from 8 hours to under 4 minutes at 50M events/day.

AWSPythondbtData Engineering
Agent Framework06

Multi-Agent Orchestrator

LangGraph-based agent system coordinating specialized AI workers for complex task automation.

LangGraphPythonRedis
Data Pipeline07

Event-Driven ETL System

Scalable data pipeline processing streaming events from multiple sources into a unified warehouse.

PythonKafkaSpark
MLOps Platform08

ML Model Registry & Serving

End-to-end MLOps platform for versioning, deploying, and monitoring ML models at scale.

SageMakerMLflowTerraform
Conversational AI09

Knowledge Base Chatbot

Conversational AI assistant with RAG-powered context retrieval for internal documentation.

BedrockOpenSearchReact

Archive

2023dataData Quality MonitorGreat Expectations · Airflow · PostgreSQL · Grafana2023mlopsReal-Time Feature StoreFeast · Redis · Spark · AWS2023dataIntelligent Text ExtractionTextract · Step Functions · Lambda · DynamoDB2023mlopsCI/CD for ML PipelinesGitHub Actions · SageMaker · CDK · Python