SIMCOM A7276s Module Development -- 2

I need an experienced developer(embedded) to work on the SIMCOM A7276s module using OPEN SDK / OPEN CPU. The primary functionalities to implement are SMS management (send and receive messages) and voice call handling (make and receive calls).
ALSO CAN TAKE ANALOG INPUT
AND ALSO GIVE SOME OUTPUT OF SOME PIN OF MODULE

Additionally, we need to set up data transmission using MQTT and HTTPS protocols. Optinal The module will need to communicate with mobile apps, web applications, and IoT devices.


IT SHOULD NOT USE EXTERNAL MCU
YOU HAVE TO USE MICROCONTROLLER WHICH INSIDE SIMCOMA7276S MODULE
USING OPEN CPU/SDK

Ideal candidates should have:
- Proven experience with SIMCOM modules and OPEN SDK/OPEN CPU
- Proficiency in MQTT and HTTPS protocols
- Strong background in mobile and web application integration
- Experience with IoT device communication

Please provide relevant work samples and a brief outline of your approach.