Airalo

Senior Core Network Solution Architect

Airalo

full-time

Posted on:

Location Type: Remote

Location: Spain

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Job Level

Senior

Tech Stack

DNS

About the role

  • Own the HLD and LLD for Core Network services, ensuring seamless integration between the Packet Core (EPC/5GC) and IMS domains.
  • Lead the technical rollout of VoLTE Roaming (S8HR) and SMSoIP strategies, ensuring high-quality voice and messaging services across diverse roaming partners.
  • Design and optimise data session flows, including Local Breakout and Home Routed architectures to minimise latency for global users.
  • Lead technical discussions with IPX/GRX providers and Equipment Vendors to secure the best architectural paths for our traffic.
  • Act as the Subject Matter Expert for the transition from 4G to 5G Standalone (SA), focusing on the deployment of the Service-Based Architecture (SBA).

Requirements

  • Extensive experience in Core Network architecture within a Tier 1 Carrier, MVNO, or major vendor environment.
  • Deep understanding of the IMS (IP Multimedia Subsystem) architecture and how it interacts with the EPC/5GC for VoLTE and SMS services.
  • Expert-level knowledge of SIP, Diameter, and GTP signalling. You should be comfortable architecting the signalling paths that facilitate global roaming.
  • Strong grasp of IPX/GRX connectivity and the BGP/DNS logic (S-NAPTR) required for global network discovery.
  • Ability to lead "Acceptance Testing" (ATP) and technical workshops with external stakeholders to ensure designs are implemented to spec.
Benefits
  • remote work
  • generous PTO
  • wellness and learning allowances
  • annual Airalo Away retreat
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
Core Network architectureVoLTE RoamingS8HRSMSoIPdata session flowsService-Based ArchitectureSIPDiameterGTP signallingBGP
Soft Skills
leadershiptechnical discussionssubject matter expertacceptance testingworkshop facilitation