Leonardo Apollonio

Meet Leonardo

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Senior full-stack engineer with 8+ years building business-critical web apps. I deliver C#/.NET and ASP.NET Core APIs, Angular/React/TypeScript front ends, SQL systems, and RAG solutions using Microsoft Semantic Kernel, LLMs, embeddings, vector databases, and document ingestion, chunking, indexing, and update pipelines for knowledge-base chatbots and semantic search. Available up to 20 hrs/week.