Telecom QA Engineer / Network Testing Specialist

What you'll do

Design and maintain **IREG-based test campaigns** for roaming partners, network changes, and service launches across **Data, Voice, and SMS**. Manage the test **SIM and eSIM fleet**, remote test probes, campaign configuration, scheduling, execution, reporting, and coverage history.

Build repeatable test pipelines, integrate **smoke and regression suites into CI/CD**, and provide clear release gates to ensure core network changes and **roaming adjustments** never quietly break existing services.

Define the **KPIs, baselines, and thresholds** that indicate service health. Correlate synthetic test results with production **KPIs and real customer journeys**, and translate findings into **alerts and runbooks** for the Operations team.

Design and run tests to verify **geo-redundancy** (e.g., site failover and failback, **Diameter and GTP path recovery**, session survival, data consistency after a switch) and ensure core platforms deliver the **capacity they were dimensioned for** under sustained load and signaling bursts.

Analyze **PCAP, MAP/SS7, Diameter, GTP, and DNS traces** alongside monitoring data to isolate failures, support **root cause analysis**, validate fixes, and strengthen regression coverage.

What you'll bring

• Experience in **telecom QA, network testing, service assurance, or roaming validation**.
• Deep knowledge of **LTE/EPC architecture**—able to diagnose registration or session flow failures.
• **Wireshark expertise**—your go-to tool for troubleshooting, not a last resort.
• Proficient in writing **automation scripts in Python** or similar languages and maintaining regression suites in **CI/CD pipelines**.

Nice to have

• Experience at a **roaming hub, IPX provider, mobile operator, or MVNO**, including **partner interoperability testing**.
• Hands-on experience managing **SIM boxes or remote testing probes**.
• Exposure to **5G roaming and VoLTE roaming**, including **S8HR and SMS over IP**.
• Familiarity with **HSS/HLR, PCRF, and OCS functions** and their role in roaming failures.
• Working knowledge of **GSMA roaming procedures** (e.g., **IR.21, IR.24, IR.35, IR.38, IR.92**).