AI Product Engineer · Writer of AI Engineering Deep Dive · Helping founders build scalable backend systemshttps://chinwenduenyinna.com/https://chinwenduenyinna.com/blog/welcome/https://chinwenduenyinna.com/blog/welcome/A short hello and what to expect from this newsletter.Tue, 14 Apr 2026 00:00:00 GMThttps://chinwenduenyinna.com/blog/retries-make-your-system-more-reliable-until-they-dont/https://chinwenduenyinna.com/blog/retries-make-your-system-more-reliable-until-they-dont/Most engineers only realise it after a retry storm takes down a production system.Fri, 10 Apr 2026 00:00:00 GMThttps://chinwenduenyinna.com/blog/how-notebooklm-handles-file-uploads/https://chinwenduenyinna.com/blog/how-notebooklm-handles-file-uploads/A walkthrough of the multi-stage pipeline that turns raw bytes into a queryable knowledge base — from Spanner-backed queues to Gemini's hybrid grounding approach.Mon, 06 Apr 2026 00:00:00 GMThttps://chinwenduenyinna.com/blog/rag-vs-agentic-rag-vs-mcp/https://chinwenduenyinna.com/blog/rag-vs-agentic-rag-vs-mcp/A clear mental model for picking the right AI architecture.Wed, 18 Feb 2026 00:00:00 GMThttps://chinwenduenyinna.com/blog/backend-tradeoffs/https://chinwenduenyinna.com/blog/backend-tradeoffs/There is no perfect backend architecture. Only systems that match their context — and systems that don't.Fri, 13 Feb 2026 00:00:00 GMT