Tell me about your experience at the National Bank of Kazakhstan (fintech).

At the National Bank of Kazakhstan, I worked on developing and maintaining fintech applications in PHP. Key tasks included integration with banking APIs, implementing payment gateways, and ensuring transaction security. I used modern frameworks and approaches such as MVC, REST API, and also implemented caching mechanisms and query optimization for the database. The project actively used monitoring and logging tools, which helped quickly identify and resolve issues in production.