Senior Infrastructure Engineer

Job Description

Build the next generation of our infrastructure from the ground up.

At AJ Bell, we believe investing should feel good and behind every reliable, secure platform is an engineering foundation built to scale. We’re embarking on one of the most ambitious technology transformations in our history: migrating our core on-premises datacentre workloads to AWS, embedding Infrastructure as Code (Terraform), and automating delivery through modern GitHub CI/CD pipelines.

As a Senior Infrastructure Engineer, you won’t just be keeping the lights on. You’ll be at the forefront of this shift helping architect, modernise, and operationalise a modern, cloud-first estate that powers millions of customer transactions.

This is a hands-on, high-impact role. You’ll lead the design and delivery of critical cloud and hybrid infrastructure, establish modern engineering standards, and mentor engineers across the team. If you thrive on turning traditional enterprise environments into lean, automated, and resilient platforms, this is your chance to leave a lasting mark.

What you'll do

• Own technical design, delivery and support for medium-sized infrastructure changes and projects. 
• Understand dependencies between infrastructure technologies, applications, networks, identity, security and operational processes. You’ll proactively monitor, plan and remediate performance and capacity issues.  
• Troubleshoot complex technical issues and implement preventative measures to stop incidents from reoccurring. 
• Adhere to engineering standards, change control, service management processes, and project governance (PRINCE2). 
• Elevate team capability by leading design and peer reviews, and actively coaching less experienced engineers. 
• Communicate effectively to technical and non-technical audiences, explaining technical risks, decisions and trade-offs clearly. 
• Effectively manage your workload, managing competing priorities and ensuring work is delivered within agreed timescales. 
• Build strong relationships with third-party suppliers while maintaining accurate asset lists and manage hardware and software renewals. 
• Operate within an Agile team, actively contributing to sprint planning, effort estimation, and retrospectives to drive continuous improvement. 

Technical knowledge

We're looking for broad infrastructure expertise across a range of technologies. Experience with the following will be valuable. 

Core Technical Knowledge

• Cloud infrastructure (preference of AWS)
• Infrastructure as Code (Terraform), automation, and scripting
• CI/CD pipelines (GitHub, BitBucket, Jenkins)
• Containers and orchestration (Kubernetes, EKS, TKG)
• Monitoring and observability tooling (Grafana, Prometheus, OpsGenie, SolarWinds)
• Windows Server and Red Hat Enterprise Linux server configuration and management

Desirable Technical Knowledge

• Fortinet networking (FortiGate, FortiManager, FortiAnalzyer, SD-WAN)
• Cisco networking (Catalyst and Nexus, ISE, Catalyst Centre, BGP, OSPF) or equivalent demonstrable networking experience
• Enterprise storage, backup and disaster recovery technologies (Netapp ONTAP, FSx, Dell Data Domain, PowerProtect) and recovery testing concepts (runbook creation, simulated failover testing) 
• VMWare technologies including Dell VxRail HCI (VCF, VMC, NSX, HCX, vSAN, Aria Suite)
• Familiarity with security tooling and practices including patch and vulnerability management, zero-trust architecture, and Privileged Access Management (PAM).

How you'll work

Technical expertise is important, but so is the way you apply it. You'll bring:

• The ability to work through complexity and ambiguity, gathering the information and perspectives needed to make sound decisions.
• Good judgement, ownership and self-awareness when balancing business needs, risk, security and operational impact.
• A customer-focused mindset, understanding how reliable infrastructure supports service quality and the customer experience.
• An appreciation of how Infrastructure connects with wider Technology Services teams and business outcomes.
• Clear communication, constructive challenge, useful feedback and a willingness to share knowledge.
• A considered approach to technical decisions, weighing evidence, available options and long-term maintainability.
• A collaborative approach to improving services, reducing operational risk and supporting lasting change.
• The ability to build strong working relationships across Technology Services and the wider business.

How you'll work

Technical expertise is important, but so is the way you apply it. You'll bring:

• The ability to work through complexity and ambiguity, gathering the information and perspectives needed to make sound decisions.
• Good judgement, ownership and self-awareness when balancing business needs, risk, security and operational impact.
• A customer-focused mindset, understanding how reliable infrastructure supports service quality and the customer experience.
• An appreciation of how Infrastructure connects with wider Technology Services teams and business outcomes.
• Clear communication, constructive challenge, useful feedback and a willingness to share knowledge.
• A considered approach to technical decisions, weighing evidence, available options and long-term maintainability.
• A collaborative approach to improving services, reducing operational risk and supporting lasting change.
• The ability to build strong working relationships across Technology Services and the wider business.

About AJ Bell

At AJ Bell, we believe investing should feel good. Whether you're looking for an ISA, pension or dealing account, whether you want to invest with the help of a financial adviser or do it yourself, we have easy-to-use solutions to suit people from all walks of life.

We're one of the UK's fastest-growing investment platform businesses, trusted by everyone from professional financial advisers to first-time investors.

Today, over 762,000 customers trust us to manage more than £121.5 billion of assets. By continually striving to make investing simpler and more accessible, we're helping more people take control of their financial futures.

We're proud to be recognised as a Great Place to Work® for the past two years, building on six consecutive years as one of the UK's Best 100 Companies to Work For. It's recognition we're proud of and a reflection of the supportive and collaborative culture we strive to create for our people.

What we offer

• Competitive starting salary
• 26 days holiday, increasing with service + buy/sell scheme + bank holidays
• 7% Pension with matched contributions
• Discretionary bonus scheme
• Share schemes (including free shares and BAYE)
• Health Cash Plan and discounted private healthcare
• Free gym
• Enhanced family leave (subject to qualifying criteria)
• Travel and bike loan schemes
• Employee Assistance Programme

Life at AJ Bell

• Regular social events including summer and Christmas parties
• Learning and development opportunities tailored to you
• Casual dress code
• Friendly, supportive team environment

Our ways of working

At AJ Bell, our people are the heart of our culture. We believe in building strong connections by working together. That's why we offer a hybrid working model, where you'll spend a minimum of 50% of working time per month in the office. For new team members, an initial period will be spent full-time in the office to help you immerse yourself in our business and build valuable relationships with your colleagues.

Inclusion & diversity

We’re committed to creating an inclusive environment where everyone feels respected, supported and able to be themselves at work.

We welcome applications from all backgrounds and make hiring decisions based on skills, experience and potential.

Agency information

This vacancy is being managed exclusively by our in-house Recruitment team. We are not partnering with recruitment agencies on this opportunity and will only accept applications submitted directly by candidates