Core Network Engineer

Airalo

. Design the IP infrastructure of multi-site data centers .

Posted 9/22/2026full-timeRemote • SpainMid-LevelSenior💰 £59,600 - £85,600 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and optimizing IP infrastructure for multi-site data centers, with a strong focus on WAN network strategy and integration of roaming agreements. Proficient in network elements and protocols essential for telecom core operations.

Highest-signal resume keywords

IP Infrastructure DesignWAN Network StrategyPacket Gateway GGSN/PGW/DPIDiameter RoutingSigtran MAP/CAP

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Network ConfigurationGTPBGPREST APIDebuggingDRAGGSN/PGWFirewallsRoutersPerformance Improvements

Soft Skills

Excellent Communication SkillsTeam Collaboration

Tools & Technologies

Core NetworkNetwork OperationsTechnology Partners

Certifications & Qualifications

Technical Degree in Engineering or Telecommunications

Industry Keywords

Telecom Core FieldRoaming AgreementsIREG TestingInternational Experience

Tech Stack

Tools & technologies

Firewalls

About the role

Key responsibilities & impact

Design the IP infrastructure of multi-site data centers
Design GRX/IPX interconnectivity and global PoP structure for access to mobile partner networks
Define the WAN network strategy
Lead realization of data center LAN and WAN networks, including configuration of DRAs, GTPs, GGSN/PGW, SBC, firewalls, and routers
Integrate direct roaming agreements and sponsored roaming agreements
Trace signalling and user-plane transport to debug issues
Act as primary interface between the Core Network team, Platform team, Network Operations team, and technology partners
Optimize and enhance the core network
Support operations with deployments, rollouts, performance improvements, training, and partner operations support

Requirements

What you’ll need

Technical Degree in Engineering or Telecommunications preferred or equivalent experience demonstrated
3–5 years minimum relevant experience in the telecom core field
3+ years experience with network elements such as Packet Gateway GGSN/PGW/DPI, direct and sponsored roaming (HLR/HSS), diameter routing and GTP, GRX
3+ years experience with Sigtran MAP, Sigtran CAP, Diameter (Ro, Gx, Gy, Gn, Gi), REST API, and BGP
Excellent verbal and written communication skills
Comfortable communicating in English in meetings and asynchronously
IREG Testing experience preferred
International working experience ideal

Benefits

Comp & perks

Fully remote work
Full-time, permanent employment
Background checks only with prior consent and as permitted by applicable law
Equal-opportunity employer
Reasonable accommodations throughout the interview process for individuals with disabilities
Local-market salary rates based on location and cost of living