Senior IREG & Network Test Engineer

🔥 0 minutes ago

🇬🇧 United Kingdom – Remote

⏰ Full Time

🟠 Senior

⚙️ Software Development Engineer in Test (SDET)

👻 Ghost score 18%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Skylo

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2017

📡 Telecommunications

🤝 B2B

💰 $30M Venture Round - Skylo on 2025-02

Telecommunications • B2B

Skylo is a company that provides global connectivity services focused on connecting IoT and edge devices through satellite-enabled cellular networks. The company's website highlights coverage maps, certified devices, a certification program, developer documentation, white papers, case studies, and a partner ecosystem — indicating a developer- and partner-focused B2B offering that enables devices to stay connected where traditional cellular coverage is limited. Skylo positions itself as a telecommunications connectivity provider for enterprises, device manufacturers, and partners building solutions that need broad geographic coverage.

📋 Description

• Own the critical technical test gate for Mobile Network Operator onboarding • Define comprehensive IREG test strategies, pass/fail metrics, network tracing protocols, and official sign-off processes for partner MNOs • Execute end-to-end roaming validation across network registration, attach sequences, S6a/S6d authentication, SGd SMS-over-NAS, and IP/NIDD data paths • Execute GSMA-defined roaming test suites • Develop custom validation test cases for Non-Terrestrial Networks • Build and maintain automated test harnesses and a lab for GSMA and Skylo-specific routing scenarios • Analyze Diameter/SS7 traces, device logs, and network logs to isolate configuration issues across Skylo, IPX, and MNO domains • Convert production and onboarding failures into repeatable regression tests • Manage defects through root cause analysis, remediation, and retesting • Publish test coverage, validation cycle-time, defect-rate, and market-readiness dashboards • Coordinate with Signaling, Routing, Billing, NOC, and Product teams, IPX vendors, and MNO test squads

🎯 Requirements

• 5+ years of hands-on experience in roaming validation, mobile core operations, interconnect routing, IREG testing, or telecommunications network testing • Strong understanding of Diameter routing and relevant SS7/MAP concepts, including S6a/S6d, SGd, and roaming authentication/registration flows • Advanced protocol troubleshooting skills • Experience reading Wireshark traces to diagnose failures involving multiple external parties • Proven experience designing automated telecommunications testing frameworks using Python or comparable languages • Experience integrating testing frameworks with modern CI/CD practices • Complete fluency handling IR.21/RAEX data profiles, PLMN structures, IMSI records, and TADIG codes • Practical experience with NB-IoT, NTN satellite architectures, NIDD data paths, or cellular device-lab environments • Familiarity with IMSI Tracing tools, carrier-grade Diameter/SS7 diagnostic platforms, Jira, and Confluence • Direct experience integrating network signaling validation with TAP/BCE billing verification • Legally authorized to work in the U.S. (application requirement) • Must indicate whether employment visa sponsorship is required

🏖️ Benefits

• Stock option based equity program • Medical, dental, and vision benefits • Retirement plan • Monthly wellness allowance • Education reimbursement • Generous time off policy • Holidays • Opportunity to temporarily work abroad • Flexible approach to work