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Airalo is an eSIM store where travelers can access more than 200 eSIMS at affordable, local rates from around the world while using an eSIM-compatible tablet, smartphone, or PC. Th
Senior Engineer, Core Network
Location
Romania
Posted
78 days ago
Salary
0
Seniority
Senior
Job Description
Senior Engineer, Core Network
Airalo
• You’ll lead the design and growth of our Packet Core (EPC/5GC), ensuring our network scales effortlessly as our global traveler base doubles and triples. • You’ll be our primary architect for global connectivity, managing roaming coverage through IPX/GRX providers and securing bi-lateral agreements that keep our users online everywhere. • You’ll dive deep into signaling procedures across 3G, 4G, and 5G NSA. When a connection fails, you’re the expert who decodes the "why" using tools like Wireshark to look under the hood of Diameter and GTP signaling. • You’ll fine-tune critical network flows—from the moment a user "attaches" to the network to the creation of high-quality voice and data bearers—ensuring every byte is delivered with precision. • You’ll lead design reviews and manage the "Acceptance Testing" (ATP) phase to ensure our partners deliver to the high standards our users expect.
Job Requirements
- You’ve spent significant time in the "engine room" of a Tier 1 Carrier, Mobile Operator, or a major Equipment Provider. You understand the stakes of a live, global network.
- You are fluent in the language of mobile networks. Whether it's legacy 3G (SGSN/GGSN), dominant 4G (MME/PGW), or the transition to 5G, you understand how these systems interlock.
- You have a rock-solid grasp of IP networking—BGP routing, subnets, and ASN management are second nature to you.
- You understand that "it’s always DNS." You have hands-on experience architecting the DNS hierarchy (S-NAPTR) that allows mobile nodes to discover one another across the globe.
Benefits
- remote work
- generous PTO
- wellness and learning allowances
- annual Airalo Away retreat
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