Role Description The Senior Site Reliability Engineer – Datacenter is a technical leader responsible for designing, delivering, and optimising enterprise-scale DC infrastructure. This role focuses on building scalable, secure, and efficient systems that support business growth and sustainability goals. Working closely with multi-functional teams, you will drive infrastructure standards, improve reliability and performance, and see opportunities for innovation and cost optimisation. You will help shape long-term infrastructure strategy, including capacity planning and adoption of new technologies. As a technical lead, you will guide medium to large-scale data centre projects end-to-end, aligning solutions with business needs and industry standard methodologies. You will contribute to decisions around architecture, resilience, and scalability while supporting teams in delivering high-quality outcomes. In this role, you will also lead complex, multi-team initiatives, ensuring smooth execution across planning, implementation, and continuous improvement. You will assist in managing risks, supporting compliance with security and regulatory standards, and driving operational excellence across global environments. - Build scalable and efficient server infrastructure solutions that meet current and future business needs, with a focus on cost optimisation and innovation. - Partner with multi-functional teams to transform business and product requirements into clear, actionable technical specifications. - Evaluate, select, and manage server hardware and vendors, including maintaining supplier relationships and procurement documentation (e.g., BOMs). - Plan and monitor capacity (power, space, cooling, network), analyse utilisation trends, and drive improvements in efficiency and rack/datacentre usage. - Ensure infrastructure security and compliance by applying established guidelines, partnering with security teams, and addressing vulnerabilities proactively. - Lead operational excellence through troubleshooting, documentation, reporting, collaborator communication, automation, and continuous process improvement. Qualifications - 8+ years of demonstrated experience in at least two areas of data centre infrastructure (e.g., power, cooling, cabling, or physical build) with a solid understanding of Layer 1 environments. - Working knowledge of power and capacity concepts (e.g., kW, amps, PUE) and server hardware fundamentals, including components and performance considerations. - Proficiency in core infrastructure and system concepts, such as storage, RAID, CPU, memory, operating systems, file systems, and networking basics. - Hands-on experience with hardware troubleshooting, diagnostics, and system configuration, including OS installs and core services (e.g., DNS, DHCP, SSH). - Ability to build strong relationships across multiple functions and communicate clearly with both technical and non-technical collaborators. - Comfortable with scripting or automation using at least one language (e.g., Python, Bash, PowerShell, or Java). - Experience using AI-powered tools (e.g., GitHub Copilot, Claude) to automate tasks, improve efficiency, or support infrastructure build and analysis. - Ability to contribute to process improvements, automation, and documentation to improve team efficiency and consistency. Requirements - Exposure to advanced data centre and networking environments, including deeper knowledge of performance optimisation and scalability. - Familiarity with BIOS, BMC, and RAID controller configurations and managing hardware at a low level. - Experience supporting enterprise-scale customers or environments, with an understanding of reliability and operations guided by service agreements. - Flexibility to travel between data centre locations (if required) and support distributed infrastructure operations. Benefits - Paid time off. - Retirement savings (e.g., 401k, pension schemes). - Bonus/incentive eligibility. - Equity grants. - Participation in our employee stock purchase plan. - Competitive health benefits. - Other family-friendly benefits including parental leave.