Security authentication of an existing Angular app

Hello, I think I can help you to add authentication or move authentication from front-end to back-end. Let me know if we can discuss. I am Sr. full stack developer & DevOps with 5+ years experience. I have experience in JavaScript, NodeJS, ExpressJS, AngularJS, Angular, MongoDB, MySQL, PostgreSQL, Linux, Nginx, Apache, AWS, Git, etc. Looking forward working with you. Thanks

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