Senior Core Network Engineer (HLR/HSS & SDM)

Airalo
Spain
Workplace: RemoteFull timeFunction: IT Operations (Systems/Network Admin)Skills: ["Communication","Problem-solving","Leadership"]

Senior Core Network Engineer responsible for designing and maintaining HLR/HSS templates, roaming profiles, and SoR logic for MVNO operations. Leads deployment of Full MVNO profiles, collaborates with roaming partners, and audits configurations while tracking KPIs like LU success and Diameter TPS at global scale.

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Airalo
Airalo
4 months ago

Senior Core Network Engineer (HLR/HSS & SDM)

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Source: Company careers pageValidated by: Fursa AI
Last checked: 6 hours agoStatus: Live

Job Summary

Senior Core Network Engineer responsible for designing and maintaining HLR/HSS templates, roaming profiles, and SoR logic for MVNO operations. Leads deployment of Full MVNO profiles, collaborates with roaming partners, and audits configurations while tracking KPIs like LU success and Diameter TPS at global scale.
Location: Spain
Workplace: Remote
Employment Type: Full time
Job Function: IT Operations (Systems/Network Admin)
Seniority: Sr. Manager level

Key Responsibilities

  • •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

Pay and Benefits

Perks:Remote WorkPaid Leave

Key Requirements

  • •Deep expertise in MAP (SS7) and Diameter (S6a/S13) protocols; VoLTE Roaming (S8HR) or SMSoIP rollout is a plus
  • •Experience with HLR, HSS, and UDM in a multi-tenant or MVNO environment
  • •Practical experience with Multi-IMSI applets and roaming via Sponsor IMSIs
  • •Solid understanding of GSMA IREG and familiarity with TADIG and how HSS/HLR templates affect billing
  • •Strong troubleshooting skills with tools like Wireshark and roaming platforms (Mobileum, Roamware, SIGOS) and experience coordinating with System Integrators
Experience:TelecommunicationsMVNOMobile network
Skills:CommunicationProblem-solvingLeadership
Tech Stack:MAPSS7DiameterS6aS13S8HRHLRHSSUDMIMSIWiresharkMobileumRoamwareSIGOSAPNPDNCamel

Company Brief

Airalo
Operates a global eSIM marketplace and mobile connectivity platform that enables travelers and global customers to buy and install eSIMs for data plans across countries without physical SIM cards.
Industry: Telecommunications
Company Size: Medium (51 to 250 employees)
Growth: Growth Stage Startup
Headquarters: Singapore, Singapore
Founded: 2019
WebsiteLinkedIn