IT System Administrator

My client, a payments solutions company, is seeking an experienced IT System Administrator to manage and support a hybrid infrastructure environment, spanning both on\-premises systems and cloud platforms. This role is critical to ensuring the stability, security, and scalability of the technology stack that underpins high\-availability payment services. You will work closely with DevOps, Security, and Application teams to ensure reliable day\-to\-day operations while continuously improving system resilience and efficiency. **Key Responsibilities****Infrastructure Management** * Administer, monitor, and maintain on\-premises servers, storage, and network infrastructure * Manage cloud environments (e.g. AWS and/or Azure), including provisioning, configuration, performance tuning, and cost optimisation * Ensure high availability, reliability, and performance of systems supporting payment processing and business\-critical services **Security \& Compliance** * Implement and maintain security best practices across both on\-prem and cloud environments * Manage identity and access controls, user privileges, and audit logging * Perform regular patching, vulnerability remediation, and compl...