Many teams want better structure in their applications, but real projects come with history. Boundaries are unclear, responsibilities overlap, and changes become risky. Spring Modulith offers good tools, but applying modularity in an existing codebase is a learning process, not a switch.

In this session, we walk through a practical approach to improving an existing monolith step by step. We look at how to find boundaries, introduce modules safely and use tests and documentation to keep the structure clear. The focus is on realistic progress inside a working product, not on a full rewrite.

After the talk, you will have a better idea of how to start and how to continue this journey in your own environment.