Android Firmware Upgrade

I need a skilled Android developer to elevate my tablet's firmware. The major enhancements required are in the performance optimization and security features.

Security and Performance:
- Implementation of efficient memory management and optimization strategies.
- Enrichment of firmware with the most modern security features.

Ideal freelancer would have:
- Proven experience in Android firmware upgrades, particularly for tablets.
- Solid knowledge of memory management and optimization.
- Track record of enhancing security in Android firmware.

In conclusion, the objective is to deliver a more robust and efficient tablet experience for users.