Contract: Linux SME - (eLux & 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: 18541 We 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 Responsibilities Lead 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 units. Key Skills & Experience Strong experience with Linux system administration and scripting. Demonstrable experience working with endpoint devices, ideally thin clients like eLux. Hands-on knowledge of Zscaler Internet Access (ZIA) and Zscaler Private Access (ZPA). Ability to troubleshoot OS-level issues and system performance concerns. Experience uploading and managing Linux system builds at scale. Strong problem-solving skills with the ability to work under pressure and deliver to tight deadlines. Familiarity with network optimization and security principles. Networking People (UK) is acting as an Employment Business in relation to this vacancy. ADZN1_UKTJ