Senior IREG & Network Test Engineer
About The Position
Skylo has pioneered a standards-based approach to satellite connectivity, connecting smartphones and IoT devices directly to satellites without special hardware or new networks. Their direct-to-device service is live on millions of activated devices across five continents. The company's commercial NTN vRAN is a 3GPP standards-based, cloud-native platform that bridges terrestrial and satellite networks. This role is crucial for ensuring the technical readiness of Mobile Network Operators (MNOs) onboarding with Skylo, covering aspects from initial attach and authentication to roaming sign-off. The position aims to replace manual testing with a repeatable, scalable, and automated regression strategy.
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 with experience reading Wireshark traces to diagnose failures involving multiple external parties.
- Proven experience designing automated telecommunications testing frameworks using Python (or comparable languages) integrated with modern CI/CD practices.
- Complete fluency handling IR.21/RAEX data profiles, PLMN structures, IMSI records, and TADIG codes.
Nice To Haves
- 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.
Responsibilities
- Define the comprehensive IREG test strategy, pass/fail metrics, network tracing protocols, and official sign-off processes for each partner MNO.
- Execute end-to-end roaming testing across network registration, attach sequences, S6a/S6d authentication, SGd SMS-over-NAS, and IP/NIDD data paths.
- Execute the standard GSMA-defined Roaming test suite while ideating and introducing custom validation test cases built specifically for NTN (Non-Terrestrial Networks).
- Build and maintain an automation test harness and lab capable of running core GSMA and Skylo-specific routing scenarios consistently.
- Analyze Diameter/SS7 traces along with device and network logs to cleanly isolate configuration issues across Skylo, IPX, and MNO domains.
- Turn production and onboarding failures into repeatable regression test cases, managing defects through root cause analysis, remediation, and retesting.
- Publish clear test coverage, validation cycle-time, defect rates, and market-readiness dashboards for the onboarding leadership team.
- Coordinate closely with internal Signaling, Routing, Billing, NOC, and Product teams, as well as external IPX vendors and MNO test squads.
Benefits
- Competitive compensation packages including a stock option-based equity program
- Comprehensive benefits including medical, dental, vision, and retirement plan
- Monthly allowances for wellness and education reimbursement
- A generous time-off policy, holidays, and the opportunity to temporarily work abroad
Stand Out From the Crowd
Upload your resume and get instant feedback on how well it matches this job.
What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
