Core Engineer

Founded in early 2010, Webbing is a global data MVNO that delivers enterprise grade, global connectivity and IoT services across more than 200 countries and 600+ mobile carriers' networks. Webbing's secured network delivers network protection and web content intelligence.

Enterprise customers can manage, monitor, and optimize data usage in real-time with Webbing's powerful software platform. Gain visibility by application type and have the power to white list applications and limit non-business applications with the click of a button, saving money and improving compliance.

• 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, troubleshooting, session management
◦ PCRF- Gx interface, policy management
◦ GTP Proxy - GTP-C interception, roaming traffic steering
Diameter - routing configuration, signaling troubleshooting, experience analyzing Diameter flows.
Radius - AAA flows, authentication, and accounting troubleshooting, experience analyzing Radius.
Understanding of roaming processes and procedures (IR.21, familiarity with IPX and GRX operations).
Working with monitoring tools
Ability to design, scale, and integrate a network element into a live network.
Hands-on experience in integration between network elements.
Comfortable working under pressure during live network incidents
At least 3 years of practical experience as a core engineer.
Familiar with APIs and basic scripting (Python or similar).
24x7 On-call duty.
Team player