Senior IREG & Roaming Network Test Engineer (Automation)

Skylo Technologies; Mountain View (CA); On-site; USD 135,000 - 165,000; Full time

Benefits offered by this job

Stock options

Medical insurance

Dental insurance

Vision insurance

Retirement plan

Wellness allowance

Education reimbursement

Generous time-off

Work abroad opportunities

Equity options

Job summary

Skylo Technologies in the United States is hiring an automation-oriented IREG & Network Test Engineer to own the MNO onboarding gate—from attach and authentication through SGD, MAP, SMS, IP NIDD, and roaming sign-off.

You will replace manual, partner-dependent execution with a repeatable test strategy, scalable lab, and automated regression pipeline. This role demands deep 3GPP knowledge and hands-on testing automation.

Qualifications

• 5+ years of experience in roaming, mobile core, interconnect, IREG, or telecommunications network testing.
• Hands-on understanding of Diameter and relevant SS7/MAP concepts, including S6a/S6d, SGd, and roaming authentication and registration flows.
• Experience reading Wireshark or equivalent signalling traces and diagnosing network failures involving multiple parties.
• Experience designing automated telecommunications testing frameworks using Python or comparable languages and CI practices.
• Fluency with IR.21/RAEX, PLMN, IMSI, TADIG, and structured testing evidence.

Responsibilities

• Own the IREG Testing Strategy: Define the onboarding roadmap with pass/fail criteria and sign-off processes.
• Drive Testing Innovation: Build an automation strategy to speed up roaming validation.
• Adapt Standards for Space: Extend GSMA roaming test suites for NTN needs and create edge-case tests.
• Build the Testing Lab: Design and maintain an automation harness for GSMA and NB-IoT NTN scenarios.
• Ensure End-to-End Interoperability: Validate roaming journeys across satellite and cellular networks.
• Translate Complex Tech into Test Cases: Create test scenarios from GSMA standards and partner configs.

Skills

Roaming & mobile core

Test automation

3GPP protocols

Diameter/SS7 tracing

Python CI frameworks

Tools

Jira

Confluence

Dashboarding

Job description

Skylo Technologies in the United States is hiring an automation-oriented IREG & Network Test Engineer to own the MNO onboarding gate—from attach and authentication through SGD, MAP, SMS, IP NIDD, and roaming sign-off.

You will replace manual, partner-dependent execution with a repeatable test strategy, scalable lab, and automated regression pipeline. This role demands deep 3GPP knowledge and hands-on testing automation.