PWA Conversion of JSP/AngularJS App

I need an experienced Progressive Web App (PWA) developer to convert our existing JSP/AngularJS web application into a mobile-optimized PWA. The goal is to improve the look and feel, navigation, and deployment strategy for mobile devices while retaining core functionality.

Our existing web app is fully functional and serves our users via browsers. However, it needs to be transformed into a modern, responsive, installable PWA that works seamlessly on smartphones and tablets with app-like performance.

Key Requirements:
- Convert the web application into a PWA with:
- App manifest and service workers.
- Offline caching support.
- Installability on Android/iOS (via browser).
- Modernize the design and improve user interface usability.
- Enhance navigation features with a simplified menu and breadcrumb navigation.

Ideal Skills and Experience:
- Proficiency in JSP and AngularJS.
- Strong expertise in PWA development.
- Experience with app manifests, service workers, and offline caching.
- UI/UX design skills to modernize and improve usability.
- Familiarity with mobile app deployment on Android and iOS.

Please share your portfolio and relevant experience.