ReactJS Day 2025: TanStack Start & Real World Experiences

🎤 Conference Context

• Event: ReactJS Day 2025, Italy’s largest React-focused conference

• Speaker: Leonardo Montini, showcasing TanStack Start, a full-stack framework powered by TanStack Router

🔧 Talk Highlights

• Leonardo shared why TanStack Router is his favorite routing library and how TanStack Start simplifies full-stack development.

• He was asked about migrating large codebases from React Router to TanStack Router. His honest answer: he hadn’t done a large-scale migration himself, but noted that a migration guide exists.

⚡ Lightning Talk Surprise

• During lunch, an attendee named Linus proposed a lightning talk titled “How we migrated a huge codebase from React Router to TanStack Router.”

• Linus delivered an impromptu session responding directly to the morning’s question, sharing real-world insights from his team’s migration experience.

• Leonardo was deeply impressed by the spontaneity and authenticity of the talk, calling it “just something else.”

🛠️ Tools & Gratitude

• Leonardo used Demo Time for his live coding setup.

• He thanked Grusp for organizing the event and Claranet Italia for supporting his DevRel journey.

💬 Final Thoughts

The article celebrates community-driven learning, the power of real-world experience, and the magic of developer events where unexpected moments create lasting impact