Senior Infrastructure Engineer (3rd Line)

Senior 3rd Line Infrastructure Engineer | Upto £70,000 Basic |

Altrincham - Hybrid

The Company

Fintech organisation. They are passionate about delivering innovative, tech-driven solutions that make financial management straightforward.

They are looking for a highly skilled and experienced 3rd Line Infrastructure Engineer to join the infrastructure team. This role requires a true subject matter expert – someone colleagues turn to when the most complex technical issues arise. You will provide advanced troubleshooting, design input, and escalation support across our infrastructure stack, ensuring high availability, security, and performance of our systems.

They offer a hybrid working pattern with very complex and interesting work in the financial sector. Currently 50+ in the technology team with a good company culture.

Key Responsibilities

• Act as the final escalation point for complex technical issues across servers, networks, and storage.
• Diagnose and resolve deep technical problems, providing clear explanations and mentoring to 1st and 2nd line engineers.
• Manage, maintain, and optimise infrastructure including:
• Windows Server / Active Directory (including GPO)
• VMware vSphere (HA/DRS, vSwitches, performance tuning)
• Linux Systems (Ubuntu, services, automation, troubleshooting)
• Networking (routing, switching, VLANs, firewalls, VPNs, TCP/IP performance analysis)
• Contribute to the design and implementation of new infrastructure projects and improvements.
• Analyse and advise on performance tuning, capacity planning, disaster recovery, and high availability strategies.
• Provide technical leadership in areas such as:
• Virtualised environment performance and uptime
• Active directory configuration and security
• Network performance
• Ensure infrastructure security, compliance, and resilience best practices are consistently applied.

Required Skills & Experience

• Windows Server & Active Directory: Deep understanding of AD internals, authentication protocols, and directory services.
• Virtualisation: Expert knowledge of VMware vSphere (vCenter, ESXi, clustering, storage, networking).
• Linux Administration: Strong command-line expertise, system hardening, and cross-platform integration.
• Networking: In-depth TCP/IP knowledge, subnetting, routing, switching, and performance analysis.
• Storage & Backup: RAID design, SAN/NAS, vSAN, snapshot strategies, backup/restore principles.
• Scripting & Automation: PowerShell, Bash, or Python for operational efficiency.
• Strong troubleshooting ability, able to explain complex technical concepts in a clear and logical manner.

Desirable Skills

• Experience with cloud platforms (Azure, AWS, GCP).
• Knowledge of DevOps practices and tools (CI/CD, Infrastructure as Code).
• Exposure to containerisation (Docker, Kubernetes).
• Familiarity with security frameworks and compliance standards (ISO 27001, CE+).

What You Get

• Basic salary – Upto £70,000
• 23 Days holiday + Bank Holidays + Increases for time in service
• Extra days leave for company paid qualifications
• Birthday off work
• Pension
• Hybrid Working pattern from Altrincham HQ – 2-3 days per week
• Discounted gym membership
• Enhanced maternity and paternity pay