Angular Developer with GraphQL, Mongoose Experience Needed

I'm looking for an experienced Angular developer to address several issues within my application.

Key Points:
- The application is experiencing a variety of issues including display, functionality, and performance problems. You will be required to identify, troubleshoot, and resolve these issues efficiently.
- The main problem that needs immediate attention is related to the publication subscription model. Users are unable to subscribe to publications and updates are inconsistent or delayed.

Ideal Skills:
- Proficient in Angular framework with a proven track record of fixing display, functionality, and performance issues in Angular applications.
- Strong knowledge and practical experience with GraphQL, Mongoose, and Apollo publication subscription model.

Your deliverables:
- Fix all identified display, functionality, and performance issues
- Solve the problem related to the publication subscription model

Please provide examples of your previous work and explain how your experience aligns with the requirements of this project.