Experienced Chrome Extension/Javascript Developer

I’m looking for an experienced Chrome Extension / JavaScript developer to complete and improve an existing Manifest V3 browser extension. The project already has a solid foundation with a dashboard, profile/account management, saved form data, Chrome Storage, background service worker, runtime messaging, API integrations, import/export, payment-related UI, status and printing modules. The main work is to review the existing code, understand the architecture, fix incomplete or broken functionality, improve the UI and data flow, implement a secure license-key authentication system, and make the extension stable and production-ready. Please do not rebuild from scratch unless technically necessary. Experience with Chrome Extensions, Manifest V3, JavaScript, Service Workers, Chrome APIs, REST APIs, and debugging existing code is preferred. Source code and detailed documentation will be provided to the selected developer.