Thoughts on building products, growing teams, AI, and the human side of tech.https://cassilup.com/en-ushttps://cassilup.com/blog/the-shifts-im-seeing-in-2026/https://cassilup.com/blog/the-shifts-im-seeing-in-2026/Developers are leaving the IDE. Designers are writing Claude Code skills. Product managers are shipping PRs instead of Jira tickets. I watched all three happen in the past month.Thu, 09 Apr 2026 00:00:00 GMThttps://cassilup.com/blog/building-in-public/https://cassilup.com/blog/building-in-public/After nearly two decades of building products behind closed doors, I'm opening up. Here's what changed, and why now.Thu, 02 Apr 2026 00:00:00 GMThttps://cassilup.com/blog/what-good-teams-look-like/https://cassilup.com/blog/what-good-teams-look-like/After building and leading teams for over a decade, here are the patterns that separate great teams from the rest. Spoiler: it's not about the tech stack.Wed, 01 Apr 2026 00:00:00 GMThttps://cassilup.com/blog/ai-changed-how-i-build/https://cassilup.com/blog/ai-changed-how-i-build/Not the hype version. The practical reality of integrating AI tools into a 19-year workflow of shipping products.Sat, 28 Mar 2026 00:00:00 GMThttps://cassilup.com/blog/fifty-talks-zero-blog-posts/https://cassilup.com/blog/fifty-talks-zero-blog-posts/I gave 50+ technical talks but never wrote them down. Here's what that taught me about shipping your ideas vs hoarding them.Wed, 25 Mar 2026 00:00:00 GMThttps://cassilup.com/blog/what-70-technical-interviews-taught-me/https://cassilup.com/blog/what-70-technical-interviews-taught-me/I interviewed 70 developers in one year. The JavaScript questions were the least interesting part.Fri, 10 May 2024 00:00:00 GMThttps://cassilup.com/blog/lessons-from-200-million-lines-of-code/https://cassilup.com/blog/lessons-from-200-million-lines-of-code/What happens when you try to map the technical knowledge of 2,500 people across 150 products. The tools were the easy part.Sat, 15 Jul 2023 00:00:00 GMT