IP Test Engineer (Telecoms)£400-£430 per day | Inside IR35Location: Slough - 5 days onsite (with 2-3 nights per year out‑of‑hours work) I'm currently looking for an IP Test Engineer to support a key UK telecoms company working on complex mobile and fixed network changes within a large IP test environment. This role is pure testing- not design and not network operations. You'll be validating IP network changes in a dedicated testbed to ensure risks are identified and resolved before anything reaches the live network. What you'll be doing You'll be testing IP and transport network changes in a controlled testbed environment You'll analyse test results and challenge outcomes where something doesn't look right You'll work with simulated traffic using specialist IP test tools to validate performance, resilience and failure scenarios You'll review technical documentation and produce test plans, strategies and test exit reports You'll liaise with engineering teams, vendors and internal stakeholders to resolve issues You'll help ensure only compliant, fully tested changes progress into the live network What I'm looking for You have strong hands‑on IP testing experience (not design) You're confident working with IP protocols and MPLS networks You can work comfortably on Juniper and/or Cisco CLI You've used IP test tools such as Spirent, IXIA, Wireshark or similar You're experienced in analysing test results and documenting outcomes You're comfortable working 5 days per week onsite in Slough You're open to a very occasional night work (typically 2-3 times per year) Important note before applying To ensure your application is flagged as relevant, please make sure your CV clearly shows evidence of all the required skills listed above, particularly: IP testing (not design) Use of IP test tools Hands‑on CLI experience Onsite availability in Slough Please make sure your CV clearly evidences your suitability for this role. Where this isn't clear, I may be unable to respond due to high application volumes. Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C's, Privacy Policy and Disclaimers which can be found at hays.co.uk