Uploaded July 2025 | Updated September 2026, 11 hours ago
Ever hear “the app is slow” and struggle to find out *why*?
In this talk, Pepijn Sanders breaks down how observability can help you debug application performance, end to end. From global latency differences to hydration delays and multi-service bottlenecks, Pepijn explains the real-world deployment challenges HelloFresh faced and how observability helped solve them.
You’ll learn how to:
- Measure and reduce latency across global regions
- Track down slow rendering, API timeouts, and client-server delays
- Optimize performance through strategic caching and co-location
Let's build scalable observability for your product 🤝 clstk.com/4lGYEY5
Check out more observability insights 📈 clstk.com/4lKfi9g
Follow Callstack on X 🐦 https://x.com/callstackio
Ever hear “the app is slow” and struggle to find out *why*?
In this talk, Pepijn Sanders breaks down how observability can help you debug application performance, end to end. From global latency differences to hydration delays and multi-service bottlenecks, Pepijn explains the real-world deployment challenges HelloFresh faced and how observability helped solve them.
You’ll learn how to:
- Measure and reduce latency across global regions
- Track down slow rendering, API timeouts, and client-server delays
- Optimize performance through strategic caching and co-location
Let's build scalable observability for your product 🤝 clstk.com/4lGYEY5
Check out more observability insights 📈 clstk.com/4lKfi9g
Follow Callstack on X 🐦 https://x.com/callstackio










