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Building the Spreadsheet of the Future

Google Sheets and Excel have been the default for decades. But why haven’t spreadsheets really evolved, even though millions rely on them every day? And what does it actually take to build a better one in 2025? In this first episode of Lessons from Production, I speak to David Kircos, founder of Quadratic (https://www.quadratic.ai/kunal), a modern spreadsheet tool, about the real challenges behind rethinking such a deeply embedded product. From scaling real-time collaboration to choosing the right tech stack for accuracy and performance, we dig into the architecture, tradeoffs, and lessons learned along the way. If you’re building web apps, thinking about performance, or just curious about what’s under the hood of tools we all take for granted, this episode is for you. ➡️ Connect with me: https://www.techwithkunal.com