airalo - Senior Core Network Engineer
Upload My Resume
Drop here or click to browse · Tap to choose · PDF, DOCX, DOC, RTF, TXT
Requirements
• Experience managing inbound/outbound roaming via Sponsor IMSI providers. • Technical knowledge of GTP-Proxy deployments for signaling and payload optimization. • Practical experience working within an MVNO or MVNE environment. • Familiarity with Regional and Local Breakout (LBO) strategies to reduce latency. • Experience with Cloud Native Network Functions (CNF) and containerized core deployments. • If you are interested in this position, please apply via the link. • By applying, you acknowledge and agree that, in case of successful application, Airalo may request to run background checks as a condition for entering into an agreement with you. Rest assured that these checks will only occur upon your prior consent and at the end of the selection process, and will be strictly limited to what is allowed under the laws that are applicable to you. All data that you share or that we collect in connection with such checks will be processed in accordance with our Privacy Policy, available here. • We sincerely thank all applicants in advance for submitting their interest in this opportunity. Airalo is an equal-opportunity employer and values diversity, equity & inclusion. We do not discriminate on the basis of race, religion, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We are committed to providing reasonable accommodations upon request for individuals with disabilities throughout our job interview process.
Responsibilities
• Design and dimension the Packet Core (EPC/5GC) to ensure scalability for data growth. • Manage roaming coverage with IPX/GRX providers, roaming sponsors, and direct bi-lateral agreements. • Architect the DNS hierarchy for the mobile core, focusing on S-NAPTR records for MME/SGSN to discover PGW/SGW/UPF nodes. • Plan and implement IP routing strategies, including ASN (Autonomous System Number) management and BGP peering for internet and roaming connectivity. • Manage Access Point Name configurations for various service types, including IMS, Internet, and IoT. • Perform deep-dive troubleshooting of signaling procedures across 3G (Iu-PS), 4G (S1-MME, S11, S5/S8), and 5G NSA (EN-DC). • Apply in-depth understanding of 3GPP standards for 3G, 4G EPC, and 5G NSA mobile data call-flows. • Analyze and optimize critical flows, specifically Attach/Registration (Authentication vectors, ULR/ULA, Create Session) and Bearer Management (Dedicated bearer creation for VoLTE/QCI 1 and default bearers). • Utilize protocol analyzers such as Wireshark or Tektronix to decode ASN.1 based messages and Diameter signaling (Gx, Gy, S6a, S5, S8, GTP-C, GTP-U). • Act as the primary technical interface with core network vendors, system integrators, and partners. • Lead technical evaluations and design reviews for core network expansions. • Manage the ATP (Acceptance Testing) phase to ensure vendor deliveries meet operational standards prior to live deployment. • ## Does this sound like you? • Experience with a Tier 1 Carrier, Mobile-Operator, or Major Network Equipment Provider (NEP) background. • Deep understanding of SGSN, GGSN, and HLR architecture. • Extensive experience with PGW, HSS, SGW, and MME. • Proficiency in 5G Non-Standalone (NSA), 5G Standalone (SA), and PCC. • Hands-on experience with Diameter S6a (HSS-MME), Gx (PCRF-PGW), and Gy (OCS-PGW). • Strong knowledge of IP addressing, subnetting, OSPF/BGP routing, VRFs, and ASN management. • Expert-level DNS resolution (A, AAAA, SRV, NAPTR), DHCP, and IPX/GRX management.
Similar Jobs
No credit card. Takes 10 seconds.