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

DescriptionAt 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 architectures (Kubernetes, containers, CNFs)- Define technical integration standards with network partners (MNO, IPX/GRX, vendors)- Ensure network readiness for 5G Standalone (SA)- Identify technical risks, opti...