A Technical Case Study by Jani Tarvainen February 2026
In February 2026, I rebuilt a multi-tenant driving directions platform that has been operating since 2007 from scratch. The project went from first commit to 17 production tenants serving real visitors across Europe and Africa in a week. The entire codebase was produced by a team of two: me as product owner, architect, and technical director, and Claude Code (Anthropic's AI coding agent) as the implementation engine. I did not write a single line of code by hand.