Senior Network Test Engineer – SD-WAN & Network Infrastructure

We are hiring "Senior Network Test Engineer – SD-WAN & Network Infrastructure" for a global service provider based out of: London Speechmark / Newbury / Birmingham Small Heath / Manchester / Glasgow -

Telecom/network infrastructure testing experience mandatory

Contract: 6–12 Months Fixed-Term Contract

Clearance: SC Cleared / Eligible for SC Clearance

Experience: 5+ Years

Role Overview

The successful candidate must have practical experience testing and validating SD-WAN, LAN/WAN, Wi-Fi, routing and switching, network protocols, connectivity, data centre infrastructure and network performance.

This is not a generic software QA or automation testing role. Candidates must demonstrate hands-on experience with network infrastructure testing and troubleshooting.

Key Responsibilities

• Design, develop, execute and manage end-to-end testing for telecom and network infrastructure projects.
• Create and review test cases, test scripts, test plans and execution evidence.
• Perform SIT, Functional, Non-Functional, DR and OAT testing.
• Execute network and connectivity testing across SD-WAN, LAN/WAN, Wi-Fi and Data Centre environments.
• Validate routers, switches, firewalls and network infrastructure components.
• Perform testing and troubleshooting of TCP/IP, DHCP, DNS and NAT.
• Validate routing and switching technologies, including BGP and OSPF.
• Perform SD-WAN validation, connectivity testing and troubleshooting.
• Conduct network performance testing, including throughput, latency, jitter and packet-loss validation.
• Use network performance and traffic-generation tools such as iPerf, Spirent, IxNetwork/Ixia or similar tools.
• Perform RFC 2544 testing and network performance benchmarking.
• Test SIP/VoIP and Unified Communications connectivity where required.
• Support Data Centre, Cloud and network infrastructure testing.
• Manage the full defect lifecycle, including defect logging, root cause analysis, retesting and closure.
• Work from HLD, LLD, Test Plans and technical requirements.
• Maintain requirements traceability, ALM and test reporting.
• Prepare and maintain test environments and network test labs.
• Mentor junior testers and collaborate with network architects, engineers and cross-functional stakeholders.

Essential Experience

• Minimum 5 years of hands-on telecom/network infrastructure testing experience.
• Strong experience testing enterprise or telecom network infrastructure.
• Hands-on experience with SD-WAN, routing, switching and network connectivity testing.
• Experience testing network protocols including TCP/IP, DHCP, DNS and NAT.
• Experience with routing protocols such as BGP and OSPF.
• Experience using network testing/performance tools such as iPerf, Spirent, IxNetwork/Ixia or similar.
• Experience performing network performance testing and RFC 2544 testing.
• Ability to create and execute test cases from HLD, LLD and Test Plans.
• Strong experience in defect management, root cause analysis and retesting.
• Experience with ALM or equivalent test management tools.