Using Domain Driven Design to Refactor Stripe Billing (bobkonf2026)

At the beginning of 2025 we started a large refactoring project to rewrite the billing engine powering Stripe Billing using Domain Driven Design. Beyond establishing best practices and processes within our teams, we developed a fork of and tooling around the ContextMapper DSL to generate code and verify that our implementation aligned with our design specifications. This talk will walk through the journey of why we reached for Domain Driven Design, how we implemented it with our teams, how it went and what we learned along the way. Licensed to the public under https://creativecommons.org/licenses/by/3.0/de about this event: https://bobkonf.de/2026/alex-thiemann.html