Telnyx - Roaming Engineer

• 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 • 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)