What kind of team is necessary to successfully deliver an app? Of course, it depends on the amount of work you need from them, so teams can vary in size, professional level and work model. The team you should start with to successfully get an app made is:
UI/UX specialist, skilled in building efficient user experience and familiar with the latest visual design trends. You can work with UI/UX specialist on a temporary basis, involving this designer only when there’s a specific need. However, it’s better to have your own designer on board constantly, to be able to adjust your design to any changes that might occur. Besides, you’ll most likely need other designs, like an app logo – at some point.
To develop the backend and frontend of your application, you will need to hire developers possessing deep expertise in the needed programming languages and technologies. Preferably they should also have some experience with building the kind of applications you want. If your team comprises a few developers, it is logical that you start with someone senior enough to be able to build the whole architecture.
Quality Assurance Engineers will be responsible for testing your application. This testing can be manual or Automation, by means of scripts and tools. It depends on the size of the project and a few other factors. Sometimes the team also includes other specialists, like DevOps – cloud specialist, or a capable Project Manager – able to keep everything on track, make sure the project goes on time, on budget also providing the quality control.