COSCUP 2025

Rails Scales! - Why startups fail and how you can succeed
2025-08-09 , TR209

Many engineers hold the belief that Rails does not scale. Indeed, many startups have problems scaling their Rails application. At the same time, massive companies like Shopify or Zendesk run Rails monoliths at a planetary scale. How do they do it?

In this presentation, Cristian Planas, former start-up founder/CTO and Group Tech Lead for performance at Zendesk will share with you what these companies know that you don’t. He will introduce you to the scalability problems that he had in his start-up, how he failed at solving them, and what are the actual options to fix them.


Difficulty:

Intermediate

Cristian Planas has worked with Ruby on Rails for more than 15 years. He has used Rails in wildly different situations, ranging from being the CTO of a start-up, to creating an application for small NGOs, to serving as Group Tech Lead at Zendesk, improving the performance of one of the biggest Rails monoliths in the world.