Core Engineer

Webbing; United States; Remote; USD 120,000 - 170,000; Full time

Benefits offered by this job

Meal vouchers

Medical insurance

Job summary

Webbing is seeking a hands-on Core Network Engineer to join the Core Network Engineering team. You will work on live mobile core infrastructure, including global roaming, MVNO operations, and a growing 5G-SA roadmap. Expect ownership of tickets end-to-end and leadership of integrations on a live production network.

You’ll operate in a fast-paced, highly accountable team, growing quickly into an independent contributor while collaborating with global colleagues and stakeholders.

Qualifications

• At least 3 years of practical experience as a core engineer.
• Hands-on experience with live mobile core networks and Roaming.
• Familiar with APIs and basic scripting (Python or similar).
• Willingness to participate in 24x7 on-call duties.

Responsibilities

• Troubleshoot real network issues across 3G/4G/5G Standalone and own tickets end-to-end.
• Lead integrations and projects on a live production network.
• Design, scale, and integrate network elements into a live environment.

Skills

Core network engineering

GTP-C / GTP-U

3GPP standards

GRX / IPX operations

Roaming processes IR.21

APIs & scripting (Python)

Job description

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.