Network Engineer (Financial services/Electronic trading)

Berenberg; City of London; On-site; GBP 70,000 - 90,000; Full time

Job summary

A leading European private bank is seeking a Senior Network Engineer in London to design, implement, and maintain their secure enterprise network infrastructure. The ideal candidate will have deep expertise in BGP, strong experience with Arista equipment, and a focus on achieving operational excellence in a fast-paced financial environment. This role offers a competitive salary and excellent benefits, including private health insurance and a pension plan.

Benefits

Private pension plan - 10% of base salary contribution

Private Health Insurance

Enhanced parental leave policies

Employee Assistance Programme

Qualifications

• Proven experience in designing and troubleshooting BGP topologies.
• Ability to design resilient Layer 3 network architectures.
• Experience with Arista switches and routers.
• Apply security principles to network access and segmentation.
• Conduct packet-level analysis for troubleshooting.

Responsibilities

• Work with Lead Network Architect to translate designs into implementation plans.
• Lead deployment of core network infrastructure projects.
• Maintain enterprise security using Fortinet devices.
• Provide 3rd-line support for critical network incidents.
• Develop network standards and operational procedures.
• Onboard new trading partners.

Skills

Deep Expertise in BGP

Network Architecture

Arista Networks

Principle of Least Privilege & Zero Trust

Complex Troubleshooting

Tools

Terraform

Ansible

Python

Job description

Network Engineer (Financial services/Electronic trading)

General information

Country

United Kingdom

City

London

Type of role

Professional

Working time

Full-time

Type of contract

Permanent

Remaining openings

1

Description & Requirements

For our Innovation Technology department in London, we are looking to hire a

Senior Network Engineer, London

Global Technology @ Berenberg

In an era where digitalisation and modern IT infrastructure is revolutionizing banking, we are shaping a technol-ogy-driven bank in which you as an IT professional will work closely with our business units. Our technology teams offer you an environment that will present you with exciting challenges - be it through the support and further development of legacy systems or the introduction of modern technologies such as AI, machine learning and highly automated trading applications.

Your Role in the team:

As a Senior Network you will be contributing to the design, implementation, and maintenance of a highly availa-ble, secure, and scalable enterprise network infrastructure critical to trading and core operations. This position requires deep, practical expertise in Layer 3 routing and BGP on Arista platforms and Fortinet security devices. The successful candidate will play a critical role in translating architectural designs into operational reality, collaborating closely with the Lead Network Architect, and driving operational excellence while adhering to strict financial compliance and security standards.

Skills and Experience

• Deep Expertise in BGP: Proven, hands-on experience designing, implementing, and troubleshooting complex Border Gateway Protocol (BGP) topologies, including route manipulation, path selection, multi-homing, and peering, VRF etc.
• Network Architecture: Demonstrated ability to design and implement highly resilient and scalable Lay-er 3 network architectures, including spine-and-leaf topologies, with a focus on low-latency and high-throughput environments (e.g., trading platforms).
• Arista Networks: Hands-on experience with configuration, operation, and advanced troubleshooting of Arista switches and routers, including experience with Arista EOS
• Principle of Least Privilege (Security Concept) & Zero Trust: Strong foundational knowledge and practi-cal experience in applying the Principle of Least Privilege (PoLP) & Zero Trust to network device access, network segmentation, and firewall rule creation to minimize the network attack surface in a regulated financial environment.
• Complex Troubleshooting: Ability to conduct deep-dive, packet-level analysis and root cause analysis (RCA) on complex, multi-protocol network issues across LAN, WAN, and Data Centre environments.

Nice-to-have:

Practical experience using Infrastructure as Code tools such as Terraform or Ansible for net-work configuration management, provisioning, and automated deployments.

Scripting: Proficiency in scripting languages, preferably Python, for network automation, API in-teraction, data manipulation, and custom tooling development.

Responsibilities

• Architectural Collaboration: Work directly with the Lead Network Architect to review High-Level De-signs, provide technical feasibility assessments, and translate the architecture into detailed Low-Level Designs (LLDs) and implementation plans (e.g. using NetBrain)
• Lead the deployment and configuration of core network infrastructure projects focused on scalability and high availability, e.g. new exchange / trading venue connectivity via datacentre cross-connects
• Administer and maintain the enterprise security posture using Fortinet devices, ensuring policy en-forcement aligns with security principles like PoLP.
• Provide 3rd-line escalation support for all critical network incidents.
• Develop and enforce network standards, policies, and operational procedures, ensuring adherence to internal risk controls and external regulatory requirements.
• Onboard and setup new connectivity with new trading partners and venues

What we offer you:

• Private pension plan - 10% of base salary contribution by Berenberg
• Private Health Insurance
• Enhanced parental leave policies
• Employee Assistance Programme offering counselling sessions related to mental health, financial wellbeing and other topics

Apply online now to join our team – we look forward to receiving your application!

We are a leading European private bank, with over 430 years of experience and deep rooted history, but we are still shaping and heavily investing in our future. Our progress and evolution are driven by our people. We encourage them to try new approaches, voice their opinions and achieve success in their own way.

We provide opportunities for them to develop their talents, explore different career paths and achieve their full potential.

We’re an ambitious, forward-looking business, backed by centuries of tradition and built on innovation. You’ll find a culture that encourages people to think independently, act entrepreneurially and challenge the status quo.

We place great importance on working on site, as we believe that being together in the office not only fosters creativity and efficiency, but also strengthens networks and builds trusting, collegial relationships. For us, this forms the foundation for productive and successful work. Together we collaborate to shape our business and fulfil our ambitious goals.

We welcome you to join us in our commitment to always do the right thing for our people, clients and our business – Our future is where you take us!

We will only accept applications submitted through our online application management system on the website.

Berenberg is an Equal Opportunities Employer and prides itself on being a modern, dynamic and internationally orientated organisation. We value the rich diversity, skills and abilities and creative potential that people from differing backgrounds and experiences bring to the workplace. Every employee plays a vital role in providing quality service to all our customers and helping to create an inclusive working environment, where everyone can realise their full potential. We’re committed to finding reasonable accommodations for candidates who require adjustments during our recruiting process. Please contact us directly on [e-mail] to discuss.