Re-architecting B2B invoicing: from MVP to daily driver EasyBiz helps SMEs in Luxembourg register and run their business. I was the sole designer on the product and owned invoicing end-to-end: from MVP 1.0 through the redesign that followed as we grew to our first 100 users over 2025 and saw what broke at scale. As a founding designer, I owned invoicing end-to-end, validated with real users, the back-office team, and support feedback as we grew to our first 100 users over 2025. Outcome I rebuilt EasyBiz invoicing from a card-based MVP into a flow that holds up at real volume. Measured with the support team after release, across all 100 users: −30% support tickets in the invoicing area Users stopped forgetting to attach transactions. The single biggest recurring ticket type dropped off. ~2× faster booking for the back-office team Staff no longer had to chase users to fix or attach transactions, or hunt for half-filled invoices (back-office estimate).