Core Engineer
Confirmed on the employer's own hiring board on Oct 14, 2026. First seen by Alion on Oct 1, 2026.
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, 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
Our engineer should have the following skills:
- 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
About Webbing
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.
What we offer
- An exciting and challenging workplace with great skill and knowledge development opportunities.
- The opportunity to join a team of highly professional specialists in an international environment.
- The opportunity for professional development within a reputable international innovative and growing company.
- Meal Vouchers.
- Medical insurance.