https://nhuantranduc.dev/blog All about Data and Artifical Intelligence en-us tranducnhuan@hotmail.com (Steve Tran) tranducnhuan@hotmail.com (Steve Tran) Sat, 28 Mar 2026 00:00:00 GMT https://nhuantranduc.dev/blog/x-algorithm-part-1 https://nhuantranduc.dev/blog/x-algorithm-part-1 X open-sourced their For You feed recommendation algorithm. This is Part 1 of a deep dive into how it works — from the four-codebase architecture to the full pipeline overview, and the one surprising design choice that changes everything. Sat, 28 Mar 2026 00:00:00 GMT tranducnhuan@hotmail.com (Steve Tran) x-algorithmrecommendation-systemmachine-learningsystem-design https://nhuantranduc.dev/blog/x-algorithm-part-2 https://nhuantranduc.dev/blog/x-algorithm-part-2 How X built a reusable, trait-based pipeline framework in Rust that separates orchestration from business logic — with clever error handling that prioritizes availability over correctness. Sat, 28 Mar 2026 00:00:00 GMT tranducnhuan@hotmail.com (Steve Tran) x-algorithmrustsystem-designrecommendation-system https://nhuantranduc.dev/blog/x-algorithm-part-5 https://nhuantranduc.dev/blog/x-algorithm-part-5 How X transforms raw ML predictions into a polished, personalized feed — the four-scorer chain, 10 pre-scoring filters, and the waterfall that reduces ~200 candidates to ~40 ranked posts. Fri, 03 Apr 2026 00:00:00 GMT tranducnhuan@hotmail.com (Steve Tran) x-algorithmrecommendation-systemsystem-designrust