Your Fridge Is a Valid Payment Device — Eleonora Drykina & Nina Žižakić, In The Pocket

Why watch

Deep technical walkthrough of building a production RAG assistant for a Belgian payments company handling 270 PDFs and 6,000 pages of regulatory rules. Covers hybrid dense+BM25 retrieval achieving 97% hit rate, table-to-CSV conversion preserving document structure, multi-tool agent with graduated search scope, and engineering challenges around 38-second latency including streaming architecture. Includes evaluation methodology using Promptfoo and citation verification. For engineers building domain-specific RAG systems with complex document structures.