Note: The job is a remote job and is open to candidates in USA. Skylo is a satellite connectivity company providing standards-based direct-to-device services through a commercial non-terrestrial network platform. The Senior IREG & Network Test Engineer will own mobile network operator onboarding test gates by developing test strategies, executing roaming validation, building automated testing environments, analyzing signaling traces, managing defects, and reporting readiness metrics.
Responsibilities
- Develop Test Strategy: Define the comprehensive IREG test strategy, pass/fail metrics, network tracing protocols, and official sign-off processes for each partner MNO
- Execute Roaming Validation: Run end-to-end roaming testing across network registration, attach sequences, S6a/S6d authentication, SGd SMS-over-NAS, and IP/NIDD data paths
- Optimize for NTN: Execute the standard GSMA-defined Roaming test suite while ideating and introducing custom validation test cases built specifically for NTN (Non-Terrestrial Networks)
- Build Automation Harnesses: Build and maintain an automation test harness and lab capable of running core GSMA and Skylo-specific routing scenarios consistently
- Trace Analysis: Analyze Diameter/SS7 traces along with device and network logs to cleanly isolate configuration issues across Skylo, IPX, and MNO domains
- Defect Management: Turn production and onboarding failures into repeatable regression test cases, managing defects through root cause analysis, remediation, and retesting
- Portfolio Metrics: Publish clear test coverage, validation cycle-time, defect rates, and market-readiness dashboards for the onboarding leadership team
- Cross-Functional Partnering: Coordinate closely with internal Signaling, Routing, Billing, NOC, and Product teams, as well as external IPX vendors and MNO test squads
Skills
- 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
- 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
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
- A once-in-a-career opportunity to operate the world's first commercial, live direct-to-device satellite network
- Access to a world-class team across software, hardware, chipsets, telecom, satellite, and network virtualization
- Open, transparent, inclusive culture that blends Silicon Valley, Nordic, and South Asia characteristics
- Health insurance, retirement plans, paid time off, and equity options
Company Overview
Company H1B Sponsorship