Describe the most difficult task you have faced within a project.

One of the most challenging tasks in an iOS project is integrating complex functionality with platform limitations and requirements for performance and UX.

For example, in one project, it was necessary to implement an offline mode for an app with a large volume of data and complex synchronization logic with the server. The main challenges were:

• Ensuring correct operation without network and smooth synchronization when it appears.
• Managing the local database considering possible conflicts and data versioning.
• Optimizing performance to prevent UI lag when processing large volumes.

To solve the problem, it was necessary to deeply study Core Data, implement custom conflict resolution mechanisms, and also carefully profile the application and optimize critical sections of the code.