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About Telnyx
Telnyx is an industry leader that's not just imagining the future of global connectivity—we're building it. From architecting and amplifying the reach of a private, global, multi-cloud IP network, to bringing hyperlocal edge technology right to your fingertips through intuitive APIs, we're shaping a new era of seamless interconnection between people, devices, and applications.
We're driven by a desire to transform and modernize what's antiquated, automate the manual, and solve real-world problems through innovative connectivity solutions. As a testament to our success, we're proud to stand as a financially stable and profitable company. Our robust profitability allows us not only to invest in pioneering technologies but also to foster an environment of continuous learning and growth for our team.
Our collective vision is a world where borderless connectivity fuels limitless innovation. By joining us, you can be part of laying the foundations for this interconnected future. We're currently seeking passionate individuals who are excited about the opportunity to contribute to an industry-shaping company while growing their own skills and careers.
About you
We are looking for an Roaming (IREG) Engineer with hands-on experience in international roaming operations and a passion for the telecom industry. You understand the GSMA roaming ecosystem inside out and can independently drive partner onboarding from test planning through to production traffic. You are a methodical tester, a clear communicator, and comfortable working across multiple partner streams simultaneously. You are interested in using AI tools and workflows to enhance your efficiency -- whether that's automating test case generation, analyzing signaling captures, or building internal tooling. We expect our engineers to leverage AI as a force multiplier in their day-to-day work.
The Role
The opportunity is within the Roaming Management squad which is responsible for the technical validation, onboarding, and operational management of all roaming partnerships. Working closely with the commercial team, you will be the engine that turns signed agreements into live, tested, production-ready roaming relationships.
Responsibilities
- Execute IREG testing for new roaming partners (2G/3G/4G/5G) following GSMA IR.21 and IREG guidelines
- Drive end-to-end partner onboarding from a technical perspective: test planning, execution, fault resolution, and sign-off
- Prepare and maintain IR.21 documentation for the Telnyx network
- Validate and troubleshoot roaming signaling (Diameter S6a, MAP, GTP-C) during testing and post-launch
- Manage TAP and NRTRDE file reconciliation with roaming partners
- Coordinate with Platform Engineering and Software Engineering squads for network configuration changes
- Support roaming escalations and production incidents related to roaming connectivity
- Maintain accurate records of test results, partner status, and roaming configurations
Who we're looking for
- 3+ years experience in international roaming operations, IREG testing, or a similar role at an MNO, MVNO, or roaming hub
- Strong understanding of GSMA standards: IR.21, IR.34, IR.65, IREG test specifications, AA.14, AA.19
- Hands-on experience with roaming signaling protocols: Diameter (S6a, S6d, S13), MAP, CAP, GTP-C/GTP-U
- Experience with TAP (R13+) and NRTRDE file processing and reconciliation
- Familiarity with roaming testing tools and signaling analysis (Wireshark, pcap analysis)
- Understanding of LTE/5G roaming architecture (S8, N32, SEPP)
- Ability to work independently across multiple partner onboarding streams simultaneously
- Strong written and verbal communication skills for cross-functional and external partner coordination
- Interest in using AI tools and workflows to improve efficiency -- automating test case generation, analyzing signaling captures, summarizing partner communications, or building internal tooling
Bonus Points
- Experience with roaming steering platforms
- Familiarity with eSIM and eUICC provisioning in a roaming context
- Experience with cloud-native telecom infrastructure
- Knowledge of VoLTE roaming (SIP, IMS) and VoLTE/VoWiFi testing
- Experience working with roaming hubs (e.g., BICS, Syniverse, Comfone)
- Experience building AI-assisted workflows (e.g., LLM-powered analysis, copilots, automated reporting)
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