Senior Infrastructure Engineer (Level 4 Support)

**About UltaHost:** Ultahost is global web hosting company with a fully remote team. We’re expanding our infrastructure and preparing to launch a new suite of cloud hosting products for customers worldwide.**Job Overview** We’re looking for a highly skilled, hands\-on **Senior Infrastructure Engineer (Level 4 Support)** who can confidently operate and scale network, virtualization, storage, and hosting infrastructure across global data centers\-and who can solve issues fast, automate aggressively, and contribute new ideas that improve our platform and product offerings. If you’re a builder\-operator who lives at the intersection of networking \+ virtualization \+ storage \+ hosting, this role is for you.**What You’ll Do (Key Responsibilities)**Design, deploy, and manage scalable cloud VPS infrastructure across multiple data centers.* Build and operate Proxmox clusters (primary platform), ensuring HA, performance, and stability. * Work with and/or support additional virtualization and cloud platforms when needed: * KVM / QEMU, Proxmox VE, VMware vSphere/ESXi, Microsoft Hyper\-V * OpenStack, oVirt / RHV, Xen, LXD/LXC, Virtuozzo (bonus) * Implement resource planning, capacity forecasting, and performance optimization across virtualization stacks. * Develop and improve provisioning pipelines, templates, images, and deployment standards. **Storage \& Ceph*** Install, manage, and optimize Ceph (MON/OSD/MGR/RGW) for high\-performance and fault\-tolerant storage. * Improve storage performance, balancing, replication, recovery, and cluster scalability. * Implement backup and snapshot strategies, and ensure storage availability for VPS and cloud services. **Network Engineering*** Configure, monitor, and troubleshoot Juniper switching/routing hardware. * Own network performance optimization: routing stability, throughput, latency, packet loss, and capacity planning. * Work with routing and HA technologies (BGP/OSPF/VRRP, VLANs, LACP, etc.). * Design secure and reliable interconnects between data centers and cloud infrastructure. **Security: Firewalls, VPNs \& Hardening*** Configure and manage firewalls, VPNs, access policies, and network security controls. * Implement security best practices: segmentation, ACL policies, patching strategy, vulnerability mitigation, and incident response readiness. * Work with secure remote access, bastion models, and least\-privilege access. **Operating Systems \& Hosting Stack*** Manage production hosting/server environments on: * Linux: Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS (legacy), Red Hat Enterprise Linux (RHEL) * Windows Server: 2016 / 2019 / 2022 (IIS/AD is a plus) * Maintain and optimize web server stacks and hosting infrastructure: * Nginx, Apache, LiteSpeed / OpenLiteSpeed * Reverse proxy setups, SSL/TLS, caching, log analysis, performance tuning * Bonus exposure: PHP\-FPM, MySQL/MariaDB, Redis, HAProxy, Keepalived **Monitoring, Reliability \& Incident Response*** Monitor infrastructure performance and proactively resolve incidents to minimize downtime. * Build alerting and observability (metrics/logs/traces) and improve real\-time monitoring workflows. * Create and implement disaster recovery plans, failover designs, and redundancy strategies. * Participate in on\-call/shift operations as required for a global hosting platform. **Documentation \& Collaboration*** Maintain detailed infrastructure documentation: configurations, diagrams, policies, and runbooks. * Collaborate with DevOps, Support, Product, and Leadership teams to ensure reliability, availability, and scalability. * Recommend architecture improvements and propose new product/feature ideas for Ultahost’s cloud offerings. **What We’re Looking For (Requirements)*** 5\+ years of experience in cloud VPS management, hosting infrastructure, data center operations, or similar roles. * Strong, hands\-on experience with: * Proxmox clusters \+ KVM/QEMU * Ceph storage (deployment, troubleshooting, tuning, scaling) * Juniper networking (routing/switching/troubleshooting) * Solid expertise across: * Virtualization \& HA concepts (cluster HA, migration, replication, failover) * Networking protocols and technologies (BGP, OSPF, VLAN, VRRP, LACP, etc.) * Performance tuning and root\-cause analysis under pressure * Security fundamentals (firewalls, VPNs, hardening, patch management) * Monitoring and incident response best practices * Strong English written \& verbal communication skills. * Comfortable with fast\-paced environments, autonomy, and shift/on\-call requirements. * Bachelor’s degree in a related field (or equivalent experience). * Preferred experience with relational databases such as MySQL, MariaDB, and PostgreSQL, with expertise in SQL administration. * Knowledge and experience in the setup, configuration, and management of various hosting platforms like cPanel, Plesk, CuberPanel, HestiaCP, cwp **Bonus Points (Nice to Have)*** Experience with OpenStack, VMware, Hyper\-V, oVirt/RHV, Xen, LXD/LXC. * Automation experience with Ansible / Terraform / Python / Bash / CI\-CD. * Kubernetes knowledge (deploying/operating clusters for customers). * Hosting billing/provisioning integration experience (WHMCS or custom systems). * Background in web hosting or cloud industry (preferred). * Strong product mindset: ability to propose and shape new cloud/hosting offerings.