Need an freelancer who knows springboot and Jira who can add feature to existing app

I am looking for a freelancer who has experience with SpringBoot and Jira to add a specific feature to my existing app. The feature I need to add is a custom field creation in Jira issues.

Requirements:
- Strong knowledge of SpringBoot and Jira
- Ability to create custom fields in Jira issues
- Familiarity with app development and integration

The freelancer should have a detailed specification of how the feature should function, as I already have a clear understanding of my requirements. The timeline for this project is immediate, and I need the feature to be added within a week.