Salary: £60,000 - 65,000 per year Requirements: We are looking for an experienced Lead Infrastructure Engineer with strong senior or third-line infrastructure or systems support experience. We require excellent knowledge of SIP, VoIP, and related communication technologies. We need solid Linux systems administration experience. We require proven AWS cloud infrastructure expertise. We need strong networking fundamentals including TCP/IP, DNS, DHCP, VLANs, and firewalling. We value experience using diagnostic and packet analysis tools such as Wireshark. We are looking for scripting or automation exposure using Bash and/or AWS Lambda. We require experience managing high-severity incidents and technical escalations. We need strong communication skills and the ability to work across technical and non-technical teams. Desirable experience includes Technology Enabled Care Services or SmartTEC environments. Desirable experience includes Node.js troubleshooting or application-level debugging. Desirable experience includes exposure to Azure or hybrid cloud environments. Desirable experience includes mentoring or leading technical support teams. Responsibilities: We lead third-line technical escalations across cloud, server, and network environments. We manage and optimise SIP-based communications platforms. We support AWS infrastructure and cloud-native services. We perform deep root-cause analysis and performance optimisation. We troubleshoot complex VoIP, SIP signalling, and call quality issues. We support Linux server environments and infrastructure operations. We work within ITIL-driven service management frameworks. We mentor and develop first- and second-line support teams. We collaborate with suppliers and vendors to resolve high-priority incidents. We take ownership of complex infrastructure environments and act as a senior escalation point. We help improve system resilience and support the evolution of our technical operations function. Technologies: AWS Lambda Azure Bash Cloud Support ITIL Linux Network TCP/IP NodeJS DevOps More: We are an innovative and rapidly evolving technology business delivering critical voice, cloud, and connected care solutions across the UK. This is a fantastic opportunity for a technically strong infrastructure professional who enjoys solving high-level technical challenges, mentoring support teams, and driving operational improvements across enterprise-scale environments. We offer the chance to act as a go-to technical expert within a collaborative environment, supporting cloud transformation, infrastructure governance, networking, automation, and technical leadership across our operations. last updated 21 week of 2026