Bootstrap 3 to 5 Migration

I need an experienced developer to migrate my current website from Bootstrap 3 to Bootstrap 5. The site uses custom CSS and JavaScript components that will require special attention during the migration. The project does not include any design changes; I want to keep the current design exactly as it is.

Ideal Skills:
- Extensive experience with Bootstrap, specifically Bootstrap 5
- Proficiency in CSS and JavaScript
- Familiarity with migrating from older Bootstrap versions
- Attention to detail to ensure all aspects of the site function correctly post-migration

Please ensure your bid reflects the complexity of the task and your expertise in this area.