Rafael Bucio

I build end-to-end web applications on AWS and integrate AI into existing business workflows. From serverless microservices to React frontends and AI-powered features — I deliver production-ready systems that scale.

→ Built full-stack platforms (React + Python + AWS) handling 3,000+ concurrent users
→ Integrated AI chatbots and RAG search systems using LangChain, OpenAI API, and FastAPI, reducing support tickets by 40%
→ Optimized financial batch processes with 30% performance gains
→ Delivered 15+ production systems across fintech, government, and SaaS
→ Designed API layers connecting multiple enterprise systems (SAP, Salesforce, ERPs)

My expertise covers the full stack: React, Next.js, Node.js, Python (Django, FastAPI), Java (Spring Boot), TypeScript, GraphQL, REST APIs, PostgreSQL, MySQL, DynamoDB.

Cloud & DevOps: AWS (Lambda, DynamoDB, Cognito, ECS, EKS, Fargate, S3, API Gateway) · Docker · Kubernetes · Terraform · CI/CD · GitHub Actions · Serverless Architecture.

AI & ML: LangChain · RAG · OpenAI API · Claude API · AI Chatbot Development · LLM Integration · Machine Learning · Prompt Engineering.

Certifications: AWS Solutions Architect Associate · AWS Developer Associate · AWS Cloud Practitioner · Oracle Certified Professional Java (×3) · Machine Learning Zoomcamp · AI Dev Tools Zoomcamp.

Open to international freelance projects and remote collaborations.