Creating non-ionic background services with cordova or java

I have an application that I started to do with ionic. A priori will be compiled only for android. In this application the user will make some registrations, which will be saved locally and every time a service in the background should try to synchronize the database with a server (a post). I completed all the steps successfully and left that part of the background last.

I'm using the plugin cordova-plugin-background-mode to perform this task. However, even testing all possible combinations over and over again, I realized that although the application stays in the background and does what I need, at some point android ends the application (free memory for example). And this causes all background services to stop running until the application is opened and placed in the background again.

I have already created services that run in the background (services and broadcasts receivers) with java for native android, but the current application is relatively large and a change would now be impractical.

My code in the app.js file looks like this:

angular.module('starter', ['ionic', 'ngCordova', 'ngStorage', 'ionic-material'])

  .run(function ($ionicPlatform, LocalizacaoService, $http) {

    $ionicPlatform.registerBackButtonAction(function (e) {
      e.preventDefault();
    }, 1000);

    $ionicPlatform.ready(function () {
      if (window.cordova && window.cordova.plugins.Keyboard) {
        // Hide the accessory bar by default (remove this to show the accessory bar above the keyboard
        // for form inputs)
        cordova.plugins.Keyboard.hideKeyboardAccessoryBar(false);

        // Don't remove this line unless you know what you are doing. It stops the viewport
        // from snapping when text inputs are focused. Ionic handles this internally for
        // a much nicer keyboard experience.
        cordova.plugins.Keyboard.disableScroll(false);
      }
      if (window.StatusBar) {
        //StatusBar.styleDefault();
        StatusBar.styleLightContent();
      }

    })

    document.addEventListener('deviceready', function () {

      cordova.plugins.backgroundMode.overrideBackButton();
      cordova.plugins.backgroundMode.excludeFromTaskList();

      //cordova.plugins.backgroundMode.configure({silent: true});
      cordova.plugins.backgroundMode.setDefaults({
        title: "My App",
        text: "Something here",
      });
      // Enable background mode
      cordova.plugins.backgroundMode.enable();
      cordova.plugins.backgroundMode.isActive();

      cordova.plugins.backgroundMode.on('activate', function () {
        cordova.plugins.backgroundMode.disableWebViewOptimizations();
      });

      // Run when the device is ready
      // Called when background mode has been activated
      cordova.plugins.backgroundMode.onactivate = function () {

        //localizacao a cada  5 min
        //localiza, salva e envia tudo
        setInterval(function () {
          //executa uma tarefa   
          console.log("executou")

        }, 10000);
        //sinc de visitas a cada 30 min
        setInterval(function () {
          //executa outra
          console.log('executou');

        }, 18000);
      }

    }, false);

  });

My questions are: is my plugin implementation wrong? or is there a possibility that after the android code is created, a service with native android be implemented in the code?