Core Engineer

Remote, Worldwide

Description

You will join the Core Network Engineering team at Webbing , working hands-on with our live mobile core infrastructure spanning global roaming, MVNO operations, and an active 5G-SA roadmap.

The role is technical and operational. You will troubleshoot real network issues across 3G, 4G, and 5G Standalone, own tickets end-to-end, and lead integrations and projects on a live production network.

We are a focused team that moves fast and takes full ownership of activities end to end.

Engineers here are expected to grow quickly into independent contributors

Requirements

• Deep understanding of MNO/MVNO architecture and end-to-end GTP flow design

• Complete familiarity with 3GPP standards across 2G/3G/4G and 5G, including:

GTP-C / GTP-U, CUPS - bearer lifecycle, session management, data plane flows

Diameter & Radius - routing, realms, application IDs (Gx, Gy, S6a), AAA flows

5G-SA architecture - AMF, SMF, UPF, NRF, PCF — hands-on or advanced lab experience

• Strong understanding of GRX routing and IPX interconnect operations

• Understanding of roaming processes and procedures: IR.21,IPX, and GRX operations

Hands-on experience

◦ PGW - configuration,...