Infrastructure Engineer - Network Specialist

Transact; City Of London; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A leading UK investment wrap platform is seeking a Network Specialist to lead the engineering and design of their hybrid infrastructure. The ideal candidate will have at least 5 years of experience in network infrastructure engineering, specifically within the Financial Services sector. This role involves designing end-to-end network solutions, managing network security, and driving automation initiatives. The successful candidate will work at the central London office with a hybrid work model offering flexibility between home and office.

Benefits

Competitive remuneration package

Excellent pension contributions

Attractive staff share scheme

BUPA health insurance

Buying and selling of annual leave

Sponsorship of professional qualifications

Qualifications

• Minimum of 5 years in a network infrastructure engineering role, ideally within Financial Services.
• Advanced experience with Azure Virtual Network (VNet) design, including subnetting and peering.
• Extensive hands-on experience designing and managing Core and Top-of-Rack (ToR) switching environments.

Responsibilities

• Design and deploy end-to-end network solutions, including LANs, WANs, WLAN, and SD-WAN Solutions.
• Serve as the subject-matter expert for Azure networking components.
• Drive cross-functional collaboration with architecture and cybersecurity teams.

Skills

Network infrastructure engineering

Azure networking components

Network security design

Cross-functional collaboration

Network automation (Ansible)

Tools

Ansible

Job description

We are currently recruiting an exciting opportunity on our IT Infrastructure team. As we continue our IT transformation journey, we are looking to bring in a Network Specialist who will be able to lead the engineering and design of our hybrid infrastructure, championing cyber‑secure design principles and drive the business on this journey.

Responsibilities

• Design, and deploy end-to-end network solutions, including LANs, WANs, WLAN and SD‑WAN Solutions, both on‑premise and within cloud infrastructure
• Serve as the subject‑matter expert for all Azure networking components, leading integration, security, and governance efforts.
• Drive cross‑functional collaboration, partnering closely with architecture, cybersecurity, and change delivery teams to ensure network designs and implementations are secure, compliant, and fully aligned with business and technical objectives.
• Drive network automation initiatives, identifying opportunities and implementing solutions (e.g. Ansible) to streamline provisioning, management, and monitoring.
• Manage and monitor networks, servers, and systems to ensure optimal performance. This includes troubleshooting network issues and performing regular maintenance and upgrades
• Lead network security design and configuration to protect the organisation's data and systems, including setting up firewalls, VPNs, policy‑based routing, and zero‑trust network security principles.
• Translate High‑Level Designs (HLDs) and business requirements into practical conceptual models, while taking full ownership for the creation, documentation, and implementation of detailed Low‑Level Designs (LLDs)
• Proactively manage the capacity and performance of the hybrid network infrastructure, with a focus on Data Center fabric scalability, and raise strategic design proposals for continuous improvement in line with business demands.
• Own the network infrastructure lifecycle strategy, including vulnerability management, patching governance, and maintenance planning.
• Provide out‑of‑hours support of the IT systems where necessary.

Qualifications

• Minimum of 5 years in a network infrastructure engineering role, ideally within Financial Services.
• Advanced experience with Azure Virtual Network (VNet) design (including subnetting, peering, and NSGs).
• Extensive hands‑on experience designing and managing Core and Top‑of‑Rack (ToR) switching environments, including resilience technologies like VSX or other MC‑LAG protocols.
• Proven experience implementing network access control (NAC) and zero‑trust principles.
• Working knowledge of configuration management and orchestration tools such as Ansible.

Benefits

• Competitive remuneration package, including company discretionary bonus.
• Excellent pension contributions.
• Attractive staff share scheme.
• BUPA health insurance.
• Buying and selling of annual leave.
• Sponsorship of relevant professional qualifications.

The role is based in our central London office, working a minimum of two days a week in the office and three days a week from home.

Transact is a leading UK investment wrap platform for financial advisers and their clients. We are collaborative, inclusive, and open‑minded, and we constantly challenge how we do things to maintain market leading status.

We provide a diverse and inclusive workplace and encourage applications from suitably qualified and eligible candidates regardless of age, disability, gender reassignment, marital or civil partner status, pregnancy or maternity, race, religion or belief, sex or sexual orientation. We are an equal opportunities employer.