Based on your project description, it’s clear you need a skilled professional who not only understands the nuances of creating a GSM Data receiver but also possesses comprehensive knowledge of ATM/POS machine connectivity. As an experienced Embedded Systems Engineer with a proven track record in designing various IoT devices, including those interfacing with banking sector equipment, I believe I’m well-suited for this task.
Specifically, my extensive expertise in microcontroller programming, which includes proficiency across several Nordic, TI, STM, AVR, Cypress, Dialog Semiconductor, and ESP series, aligns impeccably with your project's requirements. Additionally, I am also adept at working with Electronic Development Boards such as Arduino Uno and Raspberry Pi -- tools that can be instrumental in building a standalone GSM Data receiver.
Furthermore, my PCB designing skills using Altium, Eagle and KiCAD will be valuable in configuring the receiver hardware to engage seamlessly with any brand or model of ATMs/POS machines. Trust my exceptional problem-solving abilities to ensure every single data is received and stored accurately during data communication with these systems!