Senior Core Network Engineer (HLR/HSS & SDM)
AiraloPosted March 23, 2026
Full Time
About the Company
Airalo is a leading eSIM store for travelers, offering over 200+ eSIMs from around the world at affordable local rates. Our platform simplifies global connectivity by eliminating the need to carry multiple SIM cards or change phone numbers, ensuring seamless access and freedom while traveling.
Job Description
Airalo is the world’s first and largest eSIM store, helping travellers stay connected seamlessly in over 200 countries and regions. As a Senior Core Network Engineer, you will design and maintain HLR/HSS subscriber templates, collaborate with roaming partners, and lead the technical deployment of Full MVNO profiles.
Requirements
- Deep technical mastery of MAP (SS7) and Diameter (S6a/S13) protocols
- Subscriber Mapping: Extensive experience with HLR, HSS, and UDM (User Data Management) in a multi-tenant or MVNO/E environment
- Practical experience with Multi-IMSI applets and the logic required to manage roaming through Sponsor IMSIs
- Proven ability to manage technical projects with external System Integrators and roaming partners under tight deadlines
Benefits
- Remote work
- Generous PTO
- Wellness and learning allowances
- Annual Airalo Away retreat
