Core Network Engineer

Airalo is the world's first eSIM store, dedicated to making global connectivity effortless for millions of travelers across more than 200 countries. We are a fully remote, global team of over 400 professionals committed to building innovative travel technology while fostering a culture of trust, ownership, and autonomy.

Key responsibilities

• Design and manage the IP infrastructure of multi-site data centers and global PoP structures.
• Lead the implementation of data center LAN and WAN networks, including configuration of DRAs, GTPs, GGSN/PGW, and firewalls.
• Integrate direct and sponsored roaming agreements while managing signalling and user plane transport.
• Act as the primary technical interface between the Core Network team, the Platform team, and external technology partners.
• Provide expert support for network deployments, performance optimization, and operational training.

Requirements

• Technical degree in Engineering or Telecommunications, or equivalent professional experience.
• Minimum of 3-5 years of relevant experience in the telecommunications core field.
• Extensive experience with network elements such as Packet Gateways, HLR/HSS, and Diameter routing.
• Strong proficiency in protocols including Sigtran, MAP, CAP, Diameter, REST API, and BGP.
• Excellent verbal and written communication skills in English for effective collaboration.

What we offer

• A fully remote work environment that allows you to contribute from anywhere in the world.
• The opportunity to work on a high-impact product used by millions of global travelers.
• A culture that prioritizes trust, ownership, and minimal bureaucracy.
• Clear responsibilities and significant opportunities for professional growth and learning.