> Markdown version of [/jobs/ext/2706278-ireg-network-test-engineer](https://www.wearedevelopers.com/jobs/ext/2706278-ireg-network-test-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # IREG & Network Test Engineer - **Company:** Skylo Technologies - **Location:** San Francisco, CA, United States (Remote available) - **Experience:** Expert - **Salary:** $155,000.0 - $165,000.0 - **Contract:** Permanent contract - **Skills:** Test Suite, Confluence, JIRA, Build Automation, Automation of Tests, Software Bug Management, Code Coverage, Continuous Integration, Python (Programming Language), Routing, Regression Testing, Internetwork Packet Exchange, Roaming, Systems Integration, Strategies of Testing, Wireshark, Mobile Network Operator, Network Switches - **Published:** September 4, 2026 - **Apply:** https://startup.jobs/senior-ireg-network-test-engineer-skylo-technologies-8991608 ## About the Role * 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. ## Description Every Mobile Network Operator (MNO) onboarding timeline ends at a critical technical test gate. We are hiring an automation-oriented Senior IREG & Network Test Engineer to own that gate-from initial 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, a scalable testing environment, and an automated regression pipeline., * 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. ## Related Videos - [Location Verification without GPS?](https://www.wearedevelopers.com/videos/1184-location-verification-without-gps) - [Code meets connectivity - Developers as the powerhouse of Network API innovation](https://www.wearedevelopers.com/videos/1686-code-meets-connectivity-developers-as-the-powerhouse-of-network-api-innovation) - [Creating a routing app with Google Maps API from scratch](https://www.wearedevelopers.com/videos/831-creating-a-routing-app-with-google-maps-api-from-scratch) - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [Unleash the power of 5G in your code: transform your apps](https://www.wearedevelopers.com/videos/1567-unleash-the-power-of-5g-in-your-code-transform-your-apps) - [A Technical Introduction to Bitcoin's 2nd Layer- The Lightning Network](https://www.wearedevelopers.com/videos/15-a-technical-introduction-to-bitcoin-s-2nd-layer-the-lightning-network) ## Related Articles - [The 8 Best Code Testing Tools](https://www.wearedevelopers.com/magazine/402-the-8-best-code-testing-tools) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [The CAMARA Project: How Telcos Collaborating Improves Developer Experience](https://www.wearedevelopers.com/magazine/671-the-camara-project-how-telcos-collaborating-improves-developer-experience) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Best Job Boards for Remote Work for Developers](https://www.wearedevelopers.com/magazine/290-best-job-boards-for-remote-work-for-developers)