LEAD INFRASTRUCTURE ENGINEER

About Us Within Earth Holidays is a leading global B2B travel technology company operating large-scale, mission-critical production systems. We are looking for a hands-on Lead Infrastructure Engineer to own and manage our production infrastructure, ensuring high availability, scalability, security, and operational excellence. Key Responsibilities Manage and maintain on-premises Windows and Linux production infrastructure.Deploy, configure, and manage physical servers and virtual machines.Manage XCP-ng virtualization infrastructure and Xen Orchestra.Configure, optimize, and troubleshoot HAProxy load balancers.Ensure high availability with a near-zero downtime production environment.Plan and execute infrastructure scaling to support business growth.Lead production incident response, troubleshooting, root cause analysis, and preventive improvements.Drive DevOps and Site Reliability Engineering (SRE) best practices.Configure and maintain monitoring, alerting, and capacity planning.Manage SQL Server, MongoDB, Redis, ClickHouse, and PostgreSQL infrastructure.Manage VPNs, firewalls, DNS, SSL certificates, VLANs, routing, and enterprise networking.Implement backup, disaster recovery, business continuity, and security best practices.Perform server hardening, patch management, and vulnerability remediation.Support CI/CD pipelines and production deployments.Automate operational and infrastructure tasks using Bash or PowerShell (Python knowledge is an advantage).Evaluate and implement new infrastructure technologies and solutions.Maintain technical documentation, SOPs, and infrastructure diagrams.Work closely with development teams to improve application reliability and performance.Participate in on-call production support and be willing to work rotational shifts, varying working hours, weekends, and public holidays when required. Required Skills Operating Systems Windows Server (2016/2019/2022)Linux (Ubuntu, Debian, CentOS, Rocky Linux) Virtualization XCP-ngXen OrchestraVirtual Machine AdministrationStorage Management Networking HAProxyLoad BalancingTCP/IPDNSVPNVLANRoutingFirewall ConfigurationReverse ProxySSL Certificates Databases Microsoft SQL ServerMongoDBRedisClickHousePostgreSQL Strong knowledge of: High AvailabilityReplicationBackup & RecoveryDisaster RecoveryPerformance TuningCapacity PlanningTroubleshooting Monitoring DatadogZabbixGrafanaPerformance MonitoringAlertingLog Analysis DevOps GitCI/CDDockerBash or PowerShell ScriptingPython (Preferred) Cloud Microsoft AzureAzure Virtual MachinesAzure NetworkingHybrid Infrastructure Preferred Experience KubernetesRabbitMQIIS & .NET Application HostingELK StackActive DirectoryMicrosoft 365High-Traffic Production EnvironmentsTravel Technology / OTA Industry Soft Skills Excellent troubleshooting and analytical skills.Strong ownership and accountability.Ability to work independently with minimal supervision.Calm under pressure during production incidents.Strong communication and documentation skills.Team player with a proactive attitude.Passion for automation, reliability, and continuous improvement. What We Offer Opportunity to manage large-scale, high-traffic production infrastructure.Direct reporting to the CTO.Exposure to enterprise infrastructure, DevOps, SRE, and cloud technologies.Career growth within a fast-growing global travel technology company