Core Engineer

Webbing

. Join Webbing's Core Network Engineering team .

Posted 9/15/2026full-timeRemote • United StatesMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in MNO/MVNO architecture, GTP flow design, and 5G-SA integration, with hands-on experience in troubleshooting and managing live network operations. Capable of leading projects and providing 24x7 on-call support while ensuring compliance with 3GPP standards.

Highest-signal resume keywords

MNO/MVNO ArchitectureGTP Flow Design5G-SA ArchitectureDiameter & RadiusNetwork Element Integration

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

GTP-CGTP-UCUPSSession ManagementBearer LifecycleGRX RoutingIPX InterconnectPGW ConfigurationPCRFAPI Familiarity

Soft Skills

Team Player

Tools & Technologies

Monitoring Tools

Industry Keywords

3GPP StandardsRoaming ProcessesIR.21Diameter RoutingRadius AAA Flows

Tech Stack

Tools & technologies

Python

About the role

Key responsibilities & impact

Join Webbing's Core Network Engineering team
Work hands-on with live mobile core infrastructure spanning global roaming, MVNO operations, and an active 5G-SA roadmap
Troubleshoot real network issues across 3G, 4G, and 5G Standalone
Own tickets end-to-end
Lead integrations and projects on a live production network
Design, scale, and integrate network elements into a live network
Participate in network element integrations
Work with monitoring tools
Provide 24x7 on-call support

Requirements

What you’ll need

Deep understanding of MNO/MVNO architecture and end-to-end GTP flow design
Complete familiarity with 3GPP standards across 2G/3G/4G and 5G
Knowledge of GTP-C / GTP-U, CUPS, bearer lifecycle, session management, and data plane flows
Knowledge of Diameter & Radius, including routing, realms, application IDs (Gx, Gy, S6a), and AAA flows
Hands-on or advanced lab experience with 5G-SA architecture: AMF, SMF, UPF, NRF, and PCF
Strong understanding of GRX routing and IPX interconnect operations
Understanding of roaming processes and procedures: IR.21, IPX, and GRX operations
Hands-on experience with PGW configuration, troubleshooting, and session management
Hands-on experience with PCRF, Gx interface, and policy management
Hands-on experience with GTP Proxy, GTP-C interception, and roaming traffic steering
Experience with Diameter routing configuration, signaling troubleshooting, and analyzing Diameter flows
Experience with Radius AAA flows, authentication, accounting troubleshooting, and analyzing Radius
Experience working with monitoring tools
Ability to design, scale, and integrate a network element into a live network
Hands-on experience integrating network elements
Familiarity with APIs and basic scripting, such as Python or similar
At least 3 years of practical experience as a core engineer
Ability to perform 24x7 on-call duty
Team player

Benefits

Comp & perks

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.