Retrospective: Adopting Platform Engineering with Backstage 1.20: 40% Faster Onboarding

In Q3 2024, our 12-team, 87-engineer organization reduced new developer onboarding time from 14.2 days to 8.5 days—a 40% improvement—by migrating from a fragmented wiki-and-spreadsheet toolchain to a customized Backstage 1.20 platform engineering stack. This wasn't a vendor pitch: we measured every step, broke three prototypes, and had to rewrite our identity integration twice. Here's the unvarnished data, the code that worked, and the tradeoffs we wish we'd known upfront. 📡 Hacker News Top Sto