Roaming Engineer
Remote · Dublin, Leinster, Ireland or India
Job Summary
Roaming (IREG) Engineer responsible for technical validation, onboarding, and operational management of roaming partnerships. You will execute IREG testing for 2G/3G/4G/5G per GSMA IR.21/IREG guidelines, drive end-to-end partner onboarding from test planning to production traffic, prepare IR.21 documentation, validate roaming signaling (Diameter S6a, MAP, GTP-C), manage TAP and NRTRDE reconciliation, coordinate with Platform and Software Engineering squads for network configuration changes, support roaming escalations and production incidents, and maintain accurate records of test results and partner status. You will work with AI tools to automate test case generation, analyze signaling captures, and build internal tooling, applying your expertise across multiple partner onboarding streams and collaborating with cross-functional and external partners.
Required Qualifications
- 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
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