Hello! When choosing an Android developer for your mobile app, consider their experience, portfolio, technical skills, and client reviews. Look for developers who have a strong background in Android technologies and a portfolio showcasing diverse projects. Assess their understanding of your project's requirements and their ability to communicate effectively. To check their professional skills, you can review their past work, seek client testimonials, and potentially conduct a technical interview or ask for a trial task. For experienced Android development services, you might want to explore Stfalcon, known for their skilled developers and comprehensive service offerings. Visit Stfalcon's Android Development Services https://stfalcon.com/en/services/hire-android-developers for more information.