At Airalo, we're making it easier for people to stay connected wherever they travel. As the world's first eSIM store, we help millions of travelers access affordable mobile data in 200+ countries and regions around the world.
Today, we're a team of 400+ people across 60+ countries, building a product used by travelers every day. We've grown quickly, but we've worked hard to keep what matters: trust, ownership, and the freedom for people to do great work without unnecessary layers or bureaucracy.
We're fully remote by design, genuinely global, and united by a shared mission to make travel simpler for everyone.
Your Next Destination- Location: Remote.
- Contract: Full-time, permanent.
- Benefits: Learn more about our benefits here in this link - https://airalo-public.notion.site/Benefits-25396a97ffca81fb9bc1f0be479f1be3?pvs=74
- Languages: English is our main working language day to day, so you'll need to be comfortable communicating in it both in meetings and async.
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.
We started Airalo to make staying connected effortless, wherever you are in the world. Today, millions of travelers rely on our eSIMs, and many of the people building the product were customers first.
Our team spans 60+ countries, united by a shared belief that great work happens when people are trusted to own what they do. There's trust to own what you do, space to focus without constant layers of process, and a clear sense of what you're responsible for from day one.
As Airalo continues to grow, so do the opportunities to learn, take on new challenges, and make a real impact - from anywhere in the world.
Before You Hit ApplySkills 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.
