An Android developer specializes in designing applications for the Android platform, with the job market expected to grow significantly, forecasting a market expansion of around $100 billion by 2022. Average salaries vary based on experience and location, with entry-level developers earning approximately $76,000 per year and those with over 20 years of experience making about $130,000. The demand for Android developers is high due to the platform's continuous evolution and the ease of transitioning from other development roles.