Design and maintain automated tests across API and end-to-end system layers
Integrate test suites into CI/CD pipelines (e.g. GitHub Actions, Jenkins)
Analyse failures using logs, metrics, and network traces (tcpdump, Wireshark, pcap)
Validate VoIP call flows and signalling behaviour
Execute load and reliability tests; define and monitor quality metrics
Apply appropriate testing strategies (functional, integration, system-level) to ensure coverage and reliability
Use AI-assisted tools to improve test coverage and failure analysis
Collaborate with development teams to improve testability and system reliability
Work across multiple areas with minimal supervision and clear ownership of deliverables
Work in Linux environments to deploy, configure, and debug systems
Track and manage defects using Jira

Strong programming experience in Python
Experience with C/C++ preferred
Experience with test automation frameworks (e.g. pytest or equivalent)
Experience with CI/CD systems (e.g. GitHub Actions, Jenkins)
Strong Linux experience
Solid understanding of IP networking fundamentals (TCP/UDP, routing, NAT)
Hands-on experience with tcpdump, Wireshark, and pcap analysis
Experience testing and troubleshooting network-intensive systems
Experience with API and system-level testing
Ability to debug issues using logs, metrics, and traces
Experience with SQL databases
Practical use of AI tools for development or testing workflows
Strong understanding of the software development lifecycle and quality engineering practices
Professional experience in complex or distributed systems
Ability to clearly communicate technical issues and debugging findings
Ability to prioritise work based on impact and system behaviour
Bachelor’s or Master’s degree in Computer Science (or equivalent)

Experience with VoIP/SIP systems and call flows, or ability to quickly ramp up in the telecom domain
Understanding of PBX/UC call features and behaviour (e.g. call park, pickup, transfer, hunt groups, voicemail)
Experience with voice quality analysis (e.g. MOS, jitter, packet loss, latency)
Experience with load and performance testing under high traffic conditions
Familiarity with observability tools (e.g. Grafana, Kibana)
Experience with test reporting tools (e.g. Allure)
Experience with Python’s asyncio module

Software Development Engineer in Test, SDET

Key skills