Cloud & Network Infrastructure Engineer

UltaHost

Cloud & Network Infrastructure Engineer

Bulgaria

Full-Time

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 Cloud & Network Infrastructure Engineer 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).

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.

Apply for this job

Share with someone awesome

Similar Openings

AI Systems Architect Ukraine

AI Systems Architect Kazakhstan

AI Systems Architect Serbia

View all job openings