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