# Radu Ciocan Product engineer in London.. I build data-heavy SaaS products — currently SICAP.pro, a Romanian public procurement monitoring platform indexing 100GB+ of tender data. Writing about using AI agents for serious engineering work, not toy demos. Page: Feed: --- ## [1.78M PDFs, ~4B tokens, ~$540: an LLM extraction post-mortem](https://ciocan.substack.com/p/178m-pdfs-4b-tokens-540-an-llm-extraction) _2026-07-21 · Radu Ciocan_ How I turned every Romanian public official's asset declaration into a queryable database with open-weights models, one rented H100 at a time, and the traps I hit doing it, most of which had nothing ## [Gotchas from Refactoring a ~50k lines of code in 12 hours using Claude Code.](https://ciocan.substack.com/p/gotchas-from-refactoring-a-50k-lines) _2026-03-01 · Radu Ciocan_ A workflow for using AI agents on large-scale framework migrations