Site Reliability Engineer

Site Reliability Engineer | Linux, Networking & Infrastructure Up to £120K + Stock Options + Benefits | Remote First, UK Plan A Digital is recruiting for a growing FinTech company building high-performance infrastructure for global financial markets. We are looking for an experienced Site Reliability Engineer with strong Linux and network engineering foundations who enjoys working across the full infrastructure stack. This is a highly technical, hands-on position covering physical infrastructure, Linux, networking, automation, and cloud. You will join a multi-disciplinary engineering team where engineers have their own areas of expertise but share responsibility for the wider production environment. The Role You will work across a broad range of infrastructure engineering projects, including: Automating the provisioning of physical servers, networks and cloud infrastructureBuilding and provisioning bare-metal Linux serversConfiguring and troubleshooting physical network infrastructureWorking with switches, VLANs, routing and TCP/IPLinux administration, troubleshooting and kernel-level configurationDeveloping infrastructure automation using Ansible and codeBuilding tooling using Python, Go, Java, Bash or similarImproving continuous delivery and infrastructure provisioning processesSupporting highly available production infrastructureWorking across physical datacentre and AWS/GCP environmentsWorking with hardware, telecoms and other external technology providers What We Are Looking For You will ideally come from a strong Linux systems administration, network engineering or infrastructure engineering background, with experience across both systems and networking. Key experience includes: Strong Linux systems administration and troubleshootingLinux kernel configuration, tuning and performanceHands-on physical network hardwareSwitch configuration and VLANsRouting, routing protocols, TCP/IP and subnettingNetwork and connectivity troubleshootingBare-metal server provisioning and physical infrastructureAnsible or similar configuration automationAbility to code and build tooling in Python, Go, Java or another programming languageBash/shell scriptingAWS and/or GCPExperience working with external technology or infrastructure vendors Experience with technologies such as Cisco, Juniper, Arista, or F5 would be particularly relevant. The Environment Automation is central to the team, with infrastructure configuration and provisioning heavily automated. You should bring strong technical depth in your core areas, while being comfortable working across the wider infrastructure, taking ownership and learning new technologies. Experience with SAML, OAuth2, Kerberos, Active Directory/Entra ID or PostgreSQL HA would be useful but is not essential. Why Join? Up to £120K base salaryStock options + comprehensive benefitsRemote-first within the UKHighly technical engineering environmentWork on mission-critical infrastructure within financial marketsBroad exposure across Linux, networking, bare metal, automation and cloudSignificant autonomy and engineering ownershipOpportunity to build and automate infrastructure rather than simply maintain it This opportunity will particularly suit an engineer who has developed strong Linux and networking fundamentals and wants a role where physical infrastructure, automation and cloud all form part of the same engineering environment. If that sounds like your background, we would be keen to speak with you.