Hi, I’m Peter, VP of Networks at Airalo!
Our team ensures customers have instant, smooth connectivity from the moment they purchase their plan to the moment they arrive at their destination. We go beyond standard mobile service, building innovative solutions that enhance the traveller experience. We’re looking for curious engineers who want to design the future of global networks. Think outside the box, reverse-engineer solutions from ambitious product ideas, and help pave the way for Airalo’s leadership as a global connectivity partner.
Airalo’s fully remote Networks team is growing. You’ll work on the systems and infrastructure that keep over 20 million travellers connected reliably and securely at global scale. Solve complex technical challenges, optimize processes, and experiment with better ways to keep the world connected.
Your main responsibilities will be:
- Design and maintain HLR/HSS subscriber templates, ensuring precise configuration of roaming profiles, APN/PDN contexts, and Camel/Diameter triggers.
- Collaborate with roaming partners to implement and refine SoR logic within the HLR/HSS, ensuring subscribers attach to preferred networks based on cost and quality.
- Lead the technical deployment of Full MVNO profiles, managing specific QoS profiles and addressing (GTs, APNs) required for independent network operations.
- Act as the primary technical point of contact for our System Integrators, auditing HLR/HSS configurations, reviewing change requests, and ensuring alignment with the 2026 roadmap.
- Define and monitor critical HLR/HSS KPIs, including Location Update (LU) success rates and Diameter Transaction per Second (TPS) limits.
What you’ll need:
- Deep technical mastery of MAP (SS7) and Diameter (S6a/S13) protocols; additional experience with VoLTE Roaming (S8HR) or SMSoIP rollout is a significant advantage.
- 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.
- A solid understanding of GSMA IREG (IR series); familiarity with TADIG (TD series) and how HSS/HLR templates impact billing/settlement is preferred.
- A "detective" mindset for troubleshooting complex signalling failures using tools like Wireshark or roaming-specific platforms (e.g., Mobileum, Roamware, or SIGOS).
- Proven ability to manage technical projects with external System Integrators and roaming partners under tight deadlines.
Bonus Points
- Experience with 5G Unified Data Management (UDM) and Authentication Server Functions (AUSF).
- Knowledge of Cloud Native Network Functions (CNF) and containerised core deployments.
- Scripting skills (Python/Bash) for automating provisioning audits or log parsing.
Skills Required
- Deep technical mastery of MAP (SS7) and Diameter (S6a/S13) protocols.
- Extensive experience with HLR, HSS, and UDM in multi-tenant or MVNO/e environments.
- Practical experience with Multi-IMSI applets and Sponsor IMSI roaming logic.
- A solid understanding of GSMA IREG (IR series).
- Familiarity with TADIG (TD series) and HSS/HLR template impacts on billing/settlement.
- Troubleshooting complex signalling failures using Wireshark or roaming-specific platforms (Mobileum, Roamware, SIGOS).
- Proven ability to manage technical projects with external System Integrators and roaming partners under tight deadlines.
- Experience with VoLTE Roaming (S8HR) or SMSoIP rollout.
- Experience with 5G UDM and AUSF.
- Knowledge of Cloud Native Network Functions (CNF) and containerised core deployments.
- Scripting skills (Python/Bash) for automating provisioning audits or log parsing.
What We Do
Bringing you pain-free connectivity while you travel. As travelers ourselves, we’ve faced the painful situations of not finding Wi-Fi, losing the SIM card you’ve carefully taped to the back of your phone, and the horror of coming home to an unexpected roaming bill. We believe that in today’s modern world, connectivity and freedom should be accessible to all. Airalo is here to take away the pain and stress of researching and seeking out the best roaming deal. We’re here to let everyone stay connected globally while keeping it simple and pain-free. Airalo is the world’s first eSIM store for travelers to access over 200+ eSIMs at the most affordable, local rates from around the world, all via eSIM-compatible smartphone, tablet, or PC. Airalo offers you both connectivity and freedom - you’ll never have to carry multiple SIM cards or change your number again, no matter where you are in the world.
