Agentero is a SaaS platform for independent insurance agents in the United States. It provides compliance management (E&O, licenses, appointments), commission tracking, and a subscription-based marketplace to access multiple carriers. One of its key features is a powerful rater that integrates with over 50 carriers, allowing agents to generate multiple quotes and bind policies from a single data input. I led the frontend architecture, driving the migration from a Ruby on Rails monolith to a scalable React + Next.js ecosystem. I built and mentored the frontend team, created a design system to ensure consistency and productivity, and collaborated on infrastructure to support UI delivery at scale. Over the past 6 years, the platform has served thousands of agents and enabled the sale of thousands of insurance policies. Major technical challenges included executing a seamless incremental migration while continuing feature development, and unifying heterogeneous carrier integrations into a consistent user experience.