Senior infrastructure & Network Engineer in London

Founded in 2001, Reward is an industry leader transforming the world of customer engagement and commerce media.

Operating in 15 countries across Europe, Middle East and Asia, Reward’s cloud-based API platform integrates content, advertising, and commerce to deliver exceptional experiences for consumers resulting in increased customer engagement, retention, and overall satisfaction.

Reward’s Loyalty-tech platform is behind many award-winning bank loyalty programmes seen today from brands such as Visa, Nat West Group, Barclays, and First Abu Dhabi Bank to name a few.

Reward also works with the world’s largest retailers such as Mc Donald’s, e Bay, Deliveroo and Amazon.

Their leading commerce media platform fuses purchase insights with loyalty-tech, offering an unparalleled edge in digital advertising and performance marketing for retailers.

Leveraging rich data and insights, the Reward platform provides a comprehensive view of consumer behaviour, empowering retailers to target marketing messages more effectively, resulting in independently verified sales uplift and long-term customer lifetime value.

Beyond bridging the gap between content and commerce, Reward is a purpose driven business.

Their mission is to make everyday spending more rewarding.

During the last 5 years, Reward has proudly given back more than $1billion in cashback rewards to consumers world-wide.

Most recently, Reward’s rapid growth was recognised in The Independent’s E2ETech100 list of fastest growing tech scale-ups in the UK.

Reward, in conjunction with partners Nat West Group, was also awarded the Industry Achievement Award 2023 at the prestigious Card and Payments Awards.

Role Summary

We are looking for a

Senior Infrastructure Engineer to help support, maintain and improve Reward’s core infrastructure.

This is a hands-on role working across networks, firewalls, servers, Windows services, monitoring, backups and cloud-connected infrastructure

You will be joining the Infrastructure Engineering team, contributing senior technical experience to the operation, maintenance and improvement of Reward’s core infrastructure services.

The role suits someone who enjoys practical infrastructure engineering, can troubleshoot complex issues, and is comfortable working across both physical and virtual environments.

Some days may involve Wi‑Fi or wired network troubleshooting; others may involve server maintenance, backup checks, patching, data centre work, firewall changes, or building cloud environments using agreed standards.

This is not a desktop support role or a frontline Sec Ops role, although you will work closely with Desktop Engineering and Sec Ops where infrastructure overlaps.

What Success Looks Like

You will help keep Reward’s infrastructure stable, secure and well maintained.

You will provide senior technical support across networks, servers, Windows services and infrastructure platforms, contribute to improvement projects, and help the team improve its documentation, monitoring, patching, backup and operational processes.

You will be expected to bring good judgement, take responsibility of your work, and help improve the reliability of the infrastructure services that support Reward’s business.

• Main Responsibilities
• Supporting and maintaining Reward’s core infrastructure across office, data centre, hosted and cloud-connected environments.
• Managing and troubleshooting office and data centre network services, including Wi‑Fi, wired networks, LAN, WAN, VPN, routing, switching, VLANs and network links.
• Supporting the design, build, monitoring, maintenance and improvement of network infrastructure across offices, data centres and connectivity services.
• Managing core network services including DNS, DHCP, IP addressing and related infrastructure services.
• Supporting firewall changes, VPNs, connectivity issues and infrastructure security improvements.
• Administering Windows Server, Active Directory, Group Policy and related Microsoft infrastructure services.
• Supporting server monitoring, lifecycle management, patching, upgrades, backups and resilience activity.
• Monitoring infrastructure health, investigating issues and helping resolve incidents.
• Supporting backup and disaster recovery processes, including backup job monitoring, restore validation and operational improvements.
• Supporting physical infrastructure work such as cabinet/rack activity, cabling, equipment moves and data centre visits.
• Supporting the build of AWS environments in line with agreed standards and standard build processes.
• Leading or supporting defined infrastructure changes, upgrades and improvement projects.
• Providing senior technical input into infrastructure standards, documentation, troubleshooting and improvement activity.
• Keeping documentation, diagrams and support notes up to date.
• Working with the IT Manager, Infrastructure Engineering, Sec Ops, Desktop Engineering and third‑party suppliers.
• Participating in out‑of‑hours maintenance activities and an on‑call support rotation where required.
• Supporting infrastructure‑related compliance activity for PCI‑DSS, ISO27001 and internal governance standards.

Requirements

• Experience in an infrastructure, systems administration, network engineering or similar technical role.
• Good knowledge of networking, including TCP/IP, DNS, DHCP, VLANs, routing, switching, VPNs and Wi‑Fi.
• Hands‑on experience with wired and wireless network management, monitoring and troubleshooting.
• Hands‑on experience with firewalls, VPNs and connectivity troubleshooting.
• Strong Windows Server and Active Directory experience.
• Experience supporting physical, hosted or virtual server environments.
• Familiarity with server monitoring, lifecycle management, patching, backup jobs and infrastructure maintenance.
• Experience supporting infrastructure change, upgrades or improvement activity.
• Comfortable working across both logical and physical infrastructure.
• Strong troubleshooting skills and a practical, hands‑on approach.
• Good documentation and communication skills.
• Ability to take responsibility for assigned work, provide sound technical judgement and collaborate effectively as part of a team.
• Preferred Qualifications
• Microsoft 365, Azure, Intune or hybrid Microsoft environment experience.
• Cloud experience across Azure, AWS or GCP.
• Experience building AWS environments using standardised build processes.
• Power Shell or other scripting experience.
• Experience with monitoring tools such as Datadog or similar.
• Exposure to PCI‑DSS, ISO27001 or regulated environments.
• Relevant Microsoft, Azure, AWS, GCP, networking or infrastructure certifications.
• The Benefits
• Ability to buy and sell holiday days as well as the ability to bank days (tenure dependent)
• Flexible working options: we are operating a hybrid working model with 3 days a week from the office
• Pension: Hargreaves Lansdown – 6% matched contribution
• Generous family friendly cover
• Income protection
• Critical illness cover
• Life insurance cover
• Optical cover
• Yulife app for access to employee wellbeing and discounts
• Perks at Work, cashback/discount shopping site
• Salary sacrifice program which includes cycle to work scheme, electric car scheme and season ticket loans
• Company events i. e. Christmas party, all-company event and other social/hosted events during the year (we have an active social committee!)
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