Warm greeting!!
As you are looking for an ANDROID MOBILE APP/IOS DEVELOPER to "Fix the Sing up and sign in problem in the app ". I am a highly skilled App Developer with more than 5 years of quality experience in an IOS and Android App Designing and Developed wide range of responsive Ionic, Native, Hybrid, Android Mobile Apps . I have gone through your job Description and Requirement. I can surely make solve app bug for you as per your expectation. My Specialties are as following: *. API *. React Native *. ionic *. Flutter *. Kotlin *. Android Studio *. iOS platforms *. iOS programming language and requirements *. iOS Software Development Kit (SDK) *. Objective-C *. Oral communication *. Android JAVA/KOTLIN *. React.js, Vue.js, Angular.js *. HTML 5, CSS 3, Bootstrap, Javascript,Jquery *. PHP, Laravel, Codeigniter, ZendFramework. *. MySQL, MongoDB, Database Programming. Lets connect on private chat for further discussion.
Best Regards.