How We Migrated Thousands of Repositories to SaaS With Developer Experience in Mind

This talk shares how Booking.com planned and executed a large-scale migration of thousands of repositories from a self-managed Source Code Management environment to a SaaS-based platform, with developer experience at the center of every decision. We’ll walk through the technical and organizational challenges of such a migration: enabling engineers to self-migrate their repositories, tracking progress using developer activity as a metric, and ensuring smooth progress through clear documentation and communication. Attendees will gain practical insights into: - Empowering engineers to take ownership of migrations through self-service - Using developer activity to guide migration priorities - Maintaining security and compliance while minimizing friction for developers - Driving large-scale tooling change while keeping developer productivity and experience front and center Whether you’re modernizing developer tooling, planning a large-scale SaaS migration, or navigating any complex enterprise technology change, this session provides practical insights and learnings that can inform other migration efforts.