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 aPrincipal Engineerto lead the architecture and evolution of ourMVNO platform , ensuring a robust, scalable operation ready for the future of telecommunications ( 5 G 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 themobile core architecture , including signaling flows (Diameter, GTP, SIP, SS7)
Ensure the proper operation ofcharging and policy systems (OCS / PCRF / PCF)to secure revenue and network control
Lead the transition towardcloud-native architectures(Kubernetes, containers, CNFs)
Define technical integration standards withnetwork partners (MNO, IPX/GRX, vendors)
Ensure network readiness for5 G Standalone (SA)
Identify technical risks, opti...