Mid-Level Systems Engineer (Fully Remote)

VanRath; Belfast; Remote; GBP 45,000 - 65,000; Full time

Job summary

A fast-growing technology organization is looking for an Infrastructure & Systems Engineer to join their dynamic team in Belfast. The successful candidate will manage both on-premise and cloud infrastructure, modernizing legacy systems while ensuring service performance and reliability. This role demands a blend of technical expertise and strategic insight, suitable for someone eager to contribute to high-availability environments in a demanding operational setting.

Benefits

Access to the latest tools and technologies

Opportunities for continuous improvement

Qualifications

• 2+ years' experience in a hybrid infrastructure environment.
• Experience with Windows and Linux server administration.
• Hands-on skills in Active Directory, DNS, DHCP, and virtualization.

Responsibilities

• Lead the development of enterprise-wide systems infrastructure.
• Build and maintain secure, high-availability environments.
• Support migration of legacy infrastructure to modern frameworks.

Skills

Windows server administration

Linux server administration

Active Directory

Scripting

Networking

Documentation

Education

Degree in Computer Science or Engineering

Tools

Hyper-V

VMware

Ansible

Job description

Our client, a fast-growing technology organisation with global operations, is seeking a proactive Infrastructure & Systems Engineer to join their high-performing technical operations function.

This person will take ownership of both on-premise and cloud-based infrastructure, playing a key role in modernising legacy systems while maintaining the performance and resilience of existing services. The organisation maintains a demanding operational environment with 24/7 availability standards and a commitment to service excellence.

The successful candidate will be instrumental in maintaining core IT infrastructure, contributing to long-term strategy, and supporting the stability of mission-critical systems. This role is well-suited to someone with strong technical problem-solving capabilities and the ability to balance hands-on engineering with strategic thinking.

Key Responsibilities

• Lead the development and support of enterprise-wide systems infrastructure, including servers, storage, networks, and virtualisation layers.
• Build and maintain secure, high-availability environments across cloud and physical platforms, ensuring performance, capacity, and security align with business demands.
• Deliver both project-based infrastructure implementations and BAU support, contributing to disaster recovery, capacity planning, and technical documentation.
• Support a broad ecosystem of technologies-ranging from Windows/Linux servers and Active Directory to storage arrays, network devices, and cloud environments.
• Contribute to the migration of legacy infrastructure to more modern frameworks, using automation and scripting to optimise deployment and configuration.
• Liaise with senior engineers, architects, and security professionals to troubleshoot and resolve complex infrastructure issues.
• Implement and monitor backup strategies, patching, performance tuning, and system upgrades.
• Document processes, changes, and designs thoroughly to ensure repeatability and compliance.
• Monitor infrastructure systems to detect anomalies, enforce uptime standards, and support audit readiness.

What We're Looking For

• Degree in Computer Science, Engineering, or related field (or equivalent hands-on experience).
• 2+ years' experience in a hybrid infrastructure environment (on-premise and cloud).
• Hands-on proficiency with:
• Windows and Linux server administration
• Active Directory, DNS, DHCP, DFS, Group Policy
• Virtualisation technologies such as Hyper-V and VMware (vSphere/ESXi)
• Layer 2/3 networking: switching, routing, VLANs, VPN, DNS
• Some experience with scripting (PowerShell, Bash, Python preferred)
• Familiarity with patching, endpoint protection, and systems monitoring tools
• Strong documentation, planning, and organisational skills
• Ability to manage competing priorities with minimal supervision in a fast-paced setting
• Team-oriented approach with excellent communication skills

Nice to Have

- Exposure to cloud platforms such as Azure and AWS
- Familiarity with infrastructure automation tools like Ansible
- Experience with multi-site clustering or distributed failover setups

This is an exciting opportunity for someone looking to build their expertise in a dynamic environment while supporting enterprise-grade infrastructure. You'll work alongside a knowledgeable team and have access to the latest tools and technologies as part of a company that values initiative, technical curiosity, and continuous improvement.