I'm working with Ruby and Ruby on Rails since 2012. During the last decade I developed features, refactored legacy code and improved the performance in lots of big and small applications.
Most of times the main cause of performance issues is the database, so deep knowledge of how relational databases work helps me to utilize them the effective way (I prefer PostgreSQL, though).
While there are a lot of options for building APIs, I prefer GraphQL. Also, I have some knowledge in product analytics: I can set it up in the application, design the event system to collect the data for various metrics.
I have a passion to share knowledge with others, so you can easily find me speaking at the conference or writing another blog post.