Alejandro AO
AI Systems Engineer & Creator
Software engineer and YouTube creator with over 150,000 subscribers, producing production-level tutorials on building LLM applications, retrieval-augmented generation (RAG), vector databases (Pinecone, Chroma), and LangChain implementations.
Areas of focus
Professional niches
Watch Alejandro AO in Action
Proof of Work
Production RAG Pipeline with LangChain, Pinecone, and Python
Step-by-step engineering walkthrough demonstrating document chunking strategies, embedding generation, vector similarity search, and context injection with evaluation metrics.
Chunking strategies require domain-specific tuning for dense tabular or nested documents.
Context: LangChain, Pinecone vector database, OpenAI text-embedding-3-small, GPT-4o.
View missionAsk-My-PDF and Enterprise Chatbot Repositories
Authored open-source repositories with thousands of stars demonstrating end-to-end full-stack PDF retrieval chat interfaces using Streamlit, FastAPI, and LangChain.
In-memory vector indexing with FAISS is bounded by container RAM on multi-gigabyte document sets.
Context: Python, PyPDF, Streamlit, LangChain, FAISS local vector store.
View mission