Response Informatics
Network Test Engineer
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We are currently hiring a Network Testing Engineer for an exciting client engagement.
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Role: Senior Network Testing Engineer
Location: London / Newbury / Birmingham / Manchester / Glasgow, UK (Hybrid) with customer site visits 1 or 2 days a month; Newbury attendance is mandatory.
Positions: Contract (Outside IR35)
Relevant experience in the below areas:
- SD-WAN / LAN/Wi-Fi / SIP/VoIP
- Data Centre Testing
- Network & Connectivity Testing
- LAN/WAN Testing
- Network Protocols: TCP/IP, DHCP, DNS, NAT, BGP, OSPF
- Routing & Switching
- SD-WAN validation and troubleshooting
- Network performance testing using iPerf, Spirent, IxNetwork, or any similar tools
Key Responsibilities:
- Own test design and execution for assigned workstreams across the client estate.
- Review requirements, HLDs, LLDs, and project documentation to identify test scenarios and coverage gaps.
- Produce and peer-review test scripts, test cases, and execution evidence to sign-off standard.
- Lead defect triage, root-cause analysis, and retest coordination across delivery, design, engineering, and operations teams.
- Validate System Integration, Functional, Non-Functional, Disaster Recovery, and Operational Acceptance test coverage before execution windows open.
- Provide technical guidance and mentoring to Test Engineers; raise the standard of scripts, evidence, and defect records across the workstream.
- Maintain ALM discipline: test case structure, requirements traceability, defect lifecycle, and reporting accuracy.
- Execute and lead complex testing across routers, switches, firewalls, hosting, data centre, LAN/WiFi, SD-WAN, UC & Unity, telephony, mobility, MPN & cloud, IoT, fixed connectivity, cloud & security, and service transition.
- Set up and validate complex test environments, including network test equipment and RFC 2544 performance testing where required.
- Support Test Managers with status reporting, risk identification, defect trend analysis, and milestone readiness assessments.
- Represent testing in technical design discussions, ensuring testability is considered in HLD/LLD reviews.
- Interface confidently with client stakeholders and customer representatives in test working groups and triage calls.
- Escalate risks and blockers within the same working day, with proposed mitigations rather than bare problems.
- Drive reuse: contribute and curate test assets, automation candidates, and AI-assisted test design patterns supporting the programme's 5% / 10% / 18% cumulative productivity commitments.
- Support onboarding, knowledge transfer, and continuity across joiners and leavers with no impact to the Project Test Plan.
- Comply with client security policy, data handling, and audit requirements at all times, on and off site.
- Attend client hubs and customer sites as required, including Newbury HQ liaison with the wider Test team and, where applicable, the customer lab in Spain.
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