What I learned building an experimentation platform at Preply — from holdout groups to self-serve A/B testing.

Lessons from building CPK Systems — a B2B SaaS for statistical process control in metal packaging factories.

Why I run Preply's design system like a product — with adoption metrics, developer feedback loops, and a roadmap.

Talks from John Cutler and Marty Cagan; operating load of new features; data visualisation tips; statistics explained simply.