In this talk we're going to explore performance improvement lifecycle, starting with setting the performance goals, using profilers to figure out the bottle necks, making a fix and validating that the fix works by benchmarking it. The talk will be useful for novice and seasoned .NET developers and architects interested in making their application fast and understanding how things work under the hood.

Are you tired of spending hours reading code just to find the right place to make a small change? Are you forced to split your application into several just so that devs don't step on each other's toes? This talk unites theory with practice to show you how to structure your code so that it is easy to read, to test and to maintain. You will step out with concrete ideas of how to improve your code design.

Imagine you are designing a B2B service that will serve millions of businesses. This service will have dozens of different microservices with their own data, which can contain millions of records. How do you design such a database? Why is sharding not always the answer? What other options are there for such an architectural solution? I'll tell you how we at Uspacy came to serve thousands of small databases instead of a few large ones, what we've encountered and what we plan to face)

Localization and Internationalization are two core concepts to create sites and applications for international users. In creating and working on such international websites I repeatedly made or found the same mistakes and pitfalls that made creating international websites much harder than necessary. Let me take you on a tour through the concepts and common problems that arise and see how they can be solved with less headache than you might think.

In this talk, I'll give a quick introduction to LLM and how to use it in a PHP application. I'll show some examples using the LLPhant project including a retrieval-augmented generation (RAG) system using a local LLM (Llama 3) and Elasticsearch as a vector database.