At a Glance
- Tasks: Lead the design and optimisation of cutting-edge LAN and data centre networking architectures.
- Company: Join LSEG, a global leader in financial markets infrastructure with a commitment to excellence.
- Benefits: Enjoy healthcare, retirement planning, paid volunteering days, and wellbeing initiatives.
- Other info: Be part of a diverse team that values continuous learning and high-quality engineering standards.
- Why this job: Shape the future of network connectivity in a fast-paced, innovative environment.
- Qualifications: Strong experience in enterprise-scale LAN design and low latency network environments.
The predicted salary is between 80000 - 100000 £ per year.
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.
This is an exciting opportunity to join a high impact engineering team responsible for designing and evolving LSEG's mission critical LAN and data centre connectivity platforms. You will be working at the forefront of enterprise and low latency LAN network design, delivering resilient, best in class architectures that underpin global real time trading and market data systems.
As part of the specialised network connectivity and hybrid cloud engineering teams, you will help shape and deliver high performance network services across on premise and hybrid cloud environments. The team plays a central role in the firm's long term transformation, where innovation, technical depth, and continuous learning are core principles.
RESPONSIBILITIES
- Lead the design, optimisation, and evolution of LAN and data centre networking architectures, including switching, routing, traffic engineering, and segmentation.
- Deliver low latency, deterministic connectivity solutions optimised for real time trading and market data workloads.
- Develop and maintain network topologies, high availability designs, and reference architectures for use across LSEG environments.
- Implement and validate LAN features such as EVPN/VXLAN fabrics, QoS, multicast, and performance tuned network services.
- Serve as a LAN design specialist, guiding engineering teams and contributing to architectural forums, design reviews, and platform roadmap discussions.
- Partner closely with infrastructure, application, and cloud engineering teams to define connectivity requirements and support workload onboarding.
- Provide consultancy and technical direction to teams integrating their services into LAN or hybrid network environments.
- Lead troubleshooting and root cause analysis activities across complex LAN, campus, and data centre connectivity environments.
- Contribute to improvements in observability, monitoring, network telemetry, and performance diagnostics.
- Evaluate emerging LAN technologies, vendors, and design innovations, presenting findings to senior engineering stakeholders.
- Work effectively within an agile, iterative delivery model.
- Balance multiple priorities across a dynamic, fast moving environment.
- Champion high quality engineering standards and ensure designs support resilience, scalability, and security.
QUALIFICATIONS
- Strong experience in LAN and data centre network design at enterprise scale.
- Deep understanding of Layer 2/3 architectures, including STP variants, MLAG, VLANs, VXLAN/EVPN, BGP, OSPF, and ECMP.
- Proven background in building low latency, high performance network environments (preferably financial services or similarly demanding workloads).
- Strong knowledge of network segmentation, policy enforcement, redundancy design, and high availability strategies.
- Solid understanding of Linux networking, packet flows, NIC capabilities, traffic shaping, and performance tuning.
- Understanding of modern container technologies, particularly Kubernetes.
- Awareness of container networking concepts (e.g., CNI plugins), and how workloads consume network resources in hybrid cloud or on‑prem container environments.
- Familiarity with Git‑based workflows, CI/CD principles, or automation tooling (Terraform, Ansible, scripting languages).
- Strong communication skills with the ability to translate complex LAN design topics to technical and non‑technical stakeholders.
- Excellent analytical and problem‑solving skills across layered network and infrastructure environments.
- Comfortable working in a fast‑paced environment with changing priorities.
BENEFITS
LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.
EQUAL OPPORTUNITY
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.
Lead Engineer - Connectivity LAN - London Stock Exchange Group employer: Jobs via eFinancialCareers
LSEG is an exceptional employer that fosters a culture of innovation and continuous learning, making it an ideal place for professionals in the engineering field. With a commitment to employee wellbeing, we offer tailored benefits such as healthcare, retirement planning, and paid volunteering days, all within a dynamic environment that encourages personal and professional growth. Join us in London, where you will be at the forefront of cutting-edge technology, contributing to critical financial market infrastructure while enjoying a supportive and inclusive workplace.
Contact Details:
Jobs via eFinancialCareers Recruitment Team
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