Senior Network Engineer | London, UK

Senior Network Engineer

Company Description

We're Checkout.com. You might not know our name, but companies like eBay, Spotify, Klarna, Uber, and Sony do, because we're behind many of the digital experiences you use every day.

We are where the world checks out, enabling over 10 billion transactions yearly for more than one billion global shoppers.

Whether you want to book a holiday, order food, renew a subscription, or check out online, there's a good chance our tech powers the payments behind the scenes. Our platform helps the most ambitious businesses deliver effortless digital experiences, at scale.

If you want to do career-defining work, you've come to the right place. We move fast, think globally, and believe great teams are built by hiring exceptional people with conviction, curiosity, and the desire to make an impact.

With 20 offices across six continents and London as our HQ, we're shaping the future of fintech - and we're just getting started.

We are a fast-growing global FinTech company, operating across multiple regions with a footprint spanning trading floors, data centres, and corporate offices worldwide. As a Senior Network Engineer, you will own the design, delivery and ongoing optimisation of our corporate office network infrastructure globally.

You will define the standards that govern how office networks are built, ensure consistent deployment across locations, and deliver reliable, secure connectivity that supports modern workplace technologies and collaboration tools.

This is a hands-on, high-impact role. You'll be the subject matter expert who turns business requirements into reliable, secure, and scalable network solutions, from greenfield office buildouts to major refits of existing sites.

Network Design & Standards

• Define and maintain global network architecture standards for corporate office environments, covering LAN, WAN, Wi-Fi and SD-WAN, ensuring consistent and repeatable deployments across all locations.
• Develop and maintain network build standards, configuration templates, and technical runbooks
• Ensure all designs meet FinTech regulatory and security requirements (e.g., PCI-DSS, SOC2)
• Own the reference architecture and standard design patterns used for new office deployments and office expansions.

Operations, Monitoring & User Experience

• Provide escalation support (L3/L4) for network incidents across all office locations, leading root cause analysis and driving permanent fixes
• Own end-to-end network observability across all office environments, including monitoring, telemetry, packet loss, bandwidth utilisation and device health. Ensure Wi-Fi and network performance delivers a high-quality employee experience across all office locations.
• Define and track network SLAs and KPIs for office environments, with regular reporting to IT leadership
• Champion a user-first approach to network performance, proactively identifying and resolving degradation before it generates tickets
• Work closely with IT Engineering and AV teams to ensure a seamless connectivity experience for meeting rooms, collaboration tools, and hybrid working
• Drive continuous improvement initiatives based on monitoring data, user feedback, and post-incident reviews

Office Buildouts & Refits

• Lead end-to-end network delivery for new office openings and major refits globally from initial scoping and design through to commissioning and handover
• Engage and manage third-party vendors, cabling contractors, and ISPs to ensure on-time, on-budget delivery
• Conduct site surveys and produce detailed network designs, rack layouts, and cabling schematics
• Ensure all office network deployments adhere to global architecture standards and security requirements.
• Produce high- and low-level network design documentation for office network deployments.

Stakeholder & Project Management

• Partner with Real Estate, Workplace, GTSO Teams and senior IT leadership to plan and scope network requirements for new and changing office locations
• Produce clear technical documentation and present designs to both technical and non-technical stakeholders
• Manage project timelines, risks, and dependencies across concurrent office programmes

Required Skills & Experience

• 8+ years of hands-on network engineering experience, with a strong focus on corporate office environments
• Expertise in Cisco and/or Juniper switching and routing (BGP, OSPF, VLAN design, QoS)
• Solid experience with enterprise Wi-Fi platforms (Cisco Meraki, Aruba, or equivalent)
• Proven track record delivering network buildouts or major refits in a corporate or financial services environment
• Experience with SD-WAN technologies (Meraki, Fortinet or similar)
• Strong understanding of network security principles: firewalls, network segmentation, 802.1X
• Familiarity with MPLS, VPLS, and internet circuit procurement
• Experience working with third-party vendors and ISPs across multiple geographies
• Comfortable working in a regulated environment (PCI-DSS, SOC2 awareness is a plus)

Desirable

• CCNP / CCIE (Routing & Switching)
• Fortinet NSE 4-7 (Network Security)
• Exposure to network automation tooling (Ansible, Python, NetBox)
• Experience with ITSM platforms (Jira Service Management, ServiceNow or similar)
• Experience with network monitoring tools (LogicMonitor, SolarWinds, Elasticsearch, Grafana, Splunk or Datadog)
• Familiarity with data centre networking concepts and their integration with corporate office networks.

Additional Information

Bring all of you to work

We create the conditions for high performers to thrive, through real ownership, fewer blockers, and work that makes a difference from day one.

Here, you'll move fast, take on meaningful challenges, and be recognized for the impact you deliver. It's a place where ambition gets met with opportunity, and where your growth is in your hands.

We work as one team, and we back each other to succeed. So whatever your background or identity, if you're ready to grow and make a difference, you'll be right at home here.

It's important we set you up for success and make our process as accessible as possible. So let us know in your application, or tell your recruiter directly, if you need anything to make your experience or working environment more comfortable.

Life at Checkout.com

We understand that work is just one part of your life. Our hybrid working model offers flexibility, with three days per week in the office to support collaboration and connection.

Curious about what it's like to be part of our team? Visit our Careers Page to learn more about our culture, open roles, and what drives us.

For a closer look at daily life at Checkout.com, follow us on LinkedIn and Instagram