Many developers have been there. A beautifully crafted system that has helped the company grow slowly deteriorates into a big ball of mud. The calls for a rewrite are becoming louder and louder, but these big-bang rewrites historically have a high risk of failure. Is there a way to iteratively step out of the mud?

We at Flixbus faced a similar situation and were looking for answers - and we found one! The strangler (fig) pattern which allowed us to incrementally evolve even our high-risk core services towards a modern reactive system architecture. This sounds easy, but our path was paved with hard learning and many failures.

In this session I will present the patterns and practices that helped us on our journey & the many pitfalls we have found.