Principal Engineer – MVNO Network & Cloud Core (Telecom | 5G)

Description

At Walmart, we are transforming connectivity in Mexico through our digital ecosystem. We are looking for a Principal Engineer to lead the architecture and evolution of our MVNO platform , ensuring a robust, scalable operation ready for the future of telecommunications (5G and cloud-native ).

This role will be responsible for strengthening internal mobile core capabilities, reducing dependency on external vendors, and driving strategic technical decisions with direct business impact.

Key Responsibilities

• Design and optimize the mobile core architecture , including signaling flows (Diameter, GTP, SIP, SS7)
• Ensure the proper operation of charging and policy systems (OCS / PCRF / PCF) to secure revenue and network control
• Lead the transition toward cloud-native archite...