F5/Firewalls Lead Network Engineer

London Stock Exchange Group; London; On-site; GBP 60,000 - 100,000; Full time

Job summary

An established industry player is seeking a Lead Network Engineer to ensure the reliability and performance of its global network. This role involves designing and maintaining systems, collaborating with teams to solve complex network issues, and enhancing network features through automation. The ideal candidate will possess extensive knowledge of low-latency technologies and multicast protocols, along with a strong background in network infrastructure. Join a dynamic team that values innovation and excellence, and contribute to the ongoing success of a leading financial markets infrastructure provider.

Benefits

Healthcare

Retirement planning

Paid volunteering days

Wellbeing initiatives

Qualifications

• Proven experience in network products and services, focusing on low-latency technologies.
• Expertise in various networking protocols and technologies, essential for the role.

Responsibilities

• Design, build, and maintain network systems, ensuring high-quality outcomes.
• Provide technical support for network issues and lead upgrades as necessary.

Skills

Low-latency technologies

LAN

WAN

HSRP

NAT

MPLS

VPN

GRE

BGP

OSPF

Network automation

SRE

DevOps

Network packet analysis

Load balancing

Firewalls

TCP/IP

Multicast concepts

Data Centre Networking

Software-Defined Networking (SDN)

Cisco ACI

VxLAN

Service Management processes

ITIL knowledge

English communication skills

Education

Bachelor's degree in a technology-related field

CCIE certification

Tools

Packet capture tools

Network monitoring tools

Job description

ABOUT US:

LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. It's how we've contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services - and our open-access model - we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.

LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific. LSEG's ticker symbol is LSEG.

OUR PEOPLE:

People are at the heart of what we do and drive the success of our business. Our culture of connecting, creating opportunity and delivering excellence shape how we think, how we do things and how we help our people fulfil their potential. We embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions that make a difference. Our workplace generates an enriching and rewarding experience for our people and customers alike. Our vision is to build an inclusive culture in which everyone feels encouraged to fulfil their potential.

ROLE SUMMARY:

As a Lead Network Engineer, you will be responsible for the ongoing support and reliability of all components within the LSEG ecosystem, encompassing platforms, networks, applications, and services. In this role, we will provide escalation support for critical network services, ensuring the operational stability and performance of the LSEG global network.

We will find opportunities for improvement and define requirements for software automation to enhance the features, functions, and reliability of the network, supporting LSEG's digital platforms.

WHAT YOU'LL BE DOING:

• Play a key role in designing, building, and maintaining systems, software, and applications across various domains, ensuring high-quality outcomes. Independently make technical design and amendment decisions, effectively handling the workload.
• Analyse data and understand business requirements, translating them into technical specifications to align with infrastructure and network capacity needs. Develop dashboards to provide near real-time network status.
• Collaborate closely with network operations and service teams, providing in-depth technical support and guidance for multicast- and WAN-related issues and implementations.
• Proactively solve problems with a deep understanding of multicast protocols, network infrastructure, and a passion for delivering exceptional service.
• Lead upgrades when necessary, coordinating efforts with internal teams and third parties.
• Build accurate documentation and monitor system performance to support business activities and continuous improvement.
• Support the deployment of engineering patterns and contribute to creating solutions by coordinating design requirements to be automated, tested, and released.

WHAT YOU'LL BRING:

• Proven experience in network products and services, with a focus on low-latency technologies.
• Expertise in LAN, WAN, HSRP, NAT, MPLS, VPN, GRE, BGP, and OSPF.
• Comprehensive knowledge of multicast concepts, including PIM-SM, PIM-SSM, IGMP, MVPN, and MLDP.
• Proficiency in product-aligned, service-focused work, with a solid grasp of network automation, SRE, and DevOps or equivalent experience.
• Experience working on load balancing and firewalls.
• Excellent skills in network packet analysis and packet capture tools for troubleshooting.
• Familiarity with load balancing technologies, TCP/IP, and multicast in internet environments.
• Understanding of low-latency technologies commonly used in the financial sector.
• Experience in Data Centre Networking, including Software-Defined Networking (SDN), Cisco ACI, VxLAN, and related technologies.
• Proficiency in Service Management processes, preferably with ITIL knowledge.
• Excellent spoken and written English skills, enabling important collaboration.

Preferred Skills and Experience

• A bachelor's degree or equivalent experience in a technology-related field is essential.
• CCIE certification is highly desirable (including actively pursuing accreditations).
• Significant experience in technology-focused positions is crucial.
• Extensive knowledge of routing and switching protocols.
• Experience (5+ Years) as a Senior Network Engineer.
• Exposure to Network Service Providers or the Financial Services Sector.

WORKING WITH US:

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone's race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs.