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DevOps & Infrastructure
Airalo
Airalo, the eSIM marketplace serving millions of travelers in 200+ countries, is hiring a Core Network Engineer on its Core Product team. The company is a fully remote organization of 400+ people, and the posting states the role is remote and open to candidates across Airalo supported locations in Europe, with salary bands published for the UK (GBP 59,600 to 85,600), Ireland (EUR 54,000 to 77,600), Western and Northern Europe (EUR 44,550 to 86,160), Southern Europe (EUR 37,600 to 85,200), Central and Eastern Europe (EUR 40,360 to 71,240) and South-Eastern Europe and the Balkans (EUR 39,200 to 73,000); your range depends on where you are based. You will design and operate Airalo multi-site data-centre IP infrastructure, GRX and IPX interconnects and the global Point of Presence structure, owning packet-gateway and roaming-protocol connectivity end to end and acting as the primary interface between the Core Network, Platform and Network Operations teams. English is the working language day to day. Freshness: Lever posting created 2026-09-22.
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Design multi-site data centre IP infrastructure and define the WAN network strategy. Manage GRX and IPX interconnectivity and the global Point of Presence structure. Lead data centre LAN and WAN network configuration for DRAs, GTP nodes, GGSN and PGW, SBC, firewalls and routers. Integrate direct and sponsored roaming agreements and debug signaling and user-plane transport. Act as the primary interface between the Core Network, Platform and Network Operations teams. Drive core network optimization, support deployments and performance improvements, and provide training.
Technical degree in Engineering or Telecommunications or equivalent experience. 3 to 5 years of telecom core-network experience. 3+ years with packet gateways (GGSN, PGW, DPI), roaming protocols, Diameter routing, GTP and GRX. 3+ years with Sigtran (MAP, CAP), Diameter (Ro, Gx, Gy, Gn, Gi), REST APIs and BGP. Strong verbal and written communication in English. IREG testing experience and international work background are a bonus. Must be based in one of Airalo supported European locations.
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