Contract: Linux SME - (eLux andamp; Zscaler) Start Date: ASAP Duration: 6 months Rate: £500-550 a day (deemed inside IR35) Location: Hybrid Remote and 2-3 days on site in Sheffield Reference: 18541We are seeking a skilled Linux Engineer to support a high-impact project focused on optimizing voice and video traffic routing for eLux devices via Zscaler ZIA and ZPA. You will play a critical role in implementing and supporting device and user-based authentication methods, improving performance across distributed endpoints, and managing key systems on Linux.This role will require close collaboration with Zscaler''s technical teams and internal business units, with a clear roadmap for delivery.Key ResponsibilitiesLead the deployment, configuration, and testing of new eLux builds across 100k+ endpoints.Implement and validate device-based and user-based authentication mechanisms using Zscaler ZIA/ZPA.Work with internal teams and Zscaler support to troubleshoot and remediate issues related to system builds and endpoint behavior.Upload, manage, and maintain Linux-based system images and configurations.Perform root cause analysis on Linux system issues, including core OS and application layer debugging.Support performance testing and provide input into optimization strategies for voice/video offload from the core network.Liaise with technical stakeholders to ensure timely delivery and resolution of blockers, particularly those tied to performance-related concerns from business unit