Selected intern's day-to-day responsibilities include:
1. Design and build advanced applications for the Android platform.
2. Collaborate with cross-functional teams to define, design, and ship new features.
3. Work with outside data sources and APIs.
4. Unit-test code for robustness, including edge cases, usability, and general reliability.
5. Work on bug fixing and improving application performance.
6. Continuously discover, evaluate, and implement new technologies to maximize development efficiency.