Platform Engineer

Capitalontap; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Private Healthcare

Worldwide travel insurance

Pension scheme

Cycle to Work

28 days holiday

Job summary

Capital on Tap in London is building a scalable, secure Azure-based infrastructure. You will implement IaC with Terraform, manage networking and identity, and drive automation across patching and deployments.

You’ll work closely with product teams to provide a reliable cloud foundation for AI and data services. The role requires strong Terraform and PowerShell skills, good networking knowledge, and a passion for secure, scalable cloud platforms.

Qualifications

• Experience managing public cloud environments, ideally Azure.
• Strong experience writing infrastructure as code with Terraform.
• PowerShell proficiency.
• Good networking knowledge.

Responsibilities

• Build and maintain Azure foundations using Terraform, including reusable infrastructure modules and a standard Kubernetes baseline.
• Help run our network and edge, including Cloudflare, Istio and Cato.
• Manage cloud identity and access, including RBAC, managed identities and service-to-service authentication.
• Help consolidate secret and certificate management into a single, automated pattern.
• Automate infrastructure and core container patching so it runs on a reliable, fixed cadence.
• Build and maintain infrastructure CI/CD pipelines, templates and build agents.
• Support our AI infrastructure, including model access through Microsoft Foundry, Anthropic and OpenAI.

Skills

Azure

Public cloud

PowerShell

Networking knowledge

Tools

Terraform

Cloudflare

Istio

Cato

Job description

We’re Capital on Tap Capital on Tap started because small businesses were underserved. Big banks were slow, their products weren't fit for purpose, and small business owners often couldn’t access what they needed. We set out to fix that. Today we're a financial platform - not just a credit card company. We offer a best-in-class business credit card, SME-focused spend management platform, a savings product that hit £1 billion in funds within its first year, and a growing suite of tools and financial products that make running a small business easier. 1,000+ employees, £20bn in annual card spend, 200,000+ customers, 17,000+ Trustpilot reviews averaging 4.7 stars, and we're profitable. We’ve done a pretty good job so far, but we’re just getting started!

London, Old Street | 2 Days in Office

Core Infrastructure at Capital on Tap

Core Infrastructure’s mission is to build a secure, patched, cost-efficient cloud foundation, provisioned entirely as code. We own the cloud, network, identity and infrastructure delivery that every product team at Capital on Tap runs on. It’s a big year for the team: we’re consolidating how we manage access and secrets, modernising our edge, moving to GitHub and exploring a multi-cloud future. We’re also building the infrastructure behind AI at Capital on Tap, connecting our engineers and products to models from Anthropic and OpenAI securely and at scale.

What You’ll Be Doing

• Build and maintain our Azure foundations using Terraform, including reusable infrastructure modules and a standard Kubernetes baseline.
• Help run our network and edge, including Cloudflare, Istio and Cato.
• Manage cloud identity and access, including RBAC, managed identities and service-to-service authentication.
• Help consolidate secret and certificate management into a single, automated pattern.
• Automate infrastructure and core container patching so it runs on a reliable, fixed cadence.
• Build and maintain infrastructure CI/CD pipelines, templates and build agents.
• Help build and run our AI infrastructure, including model access through Microsoft Foundry, Anthropic and OpenAI.
• Support our AI and MCP gateway layer, managing access, routing and authentication for AI tools and agents.
• Apply the same security, identity and observability standards to AI services as the rest of our cloud platform.
• Look after infrastructure monitoring with Grafana, Prometheus and Log Analytics.
• Contribute to cloud cost management, disaster recovery and multi-cloud.
• Work with Database Engineering, SRE and Developer Enablement on shared infrastructure projects.
• Write clear documentation and help keep our infrastructure standards up to date.

Our Values & Culture

Just Pilot: We never settle for “good enough”. We pilot new ideas fast, ask questions to figure it out, and scale quickly.

Why Not Today? Fast is as slow as we go - speed and simplicity gives us a competitive advantage.

Be a Buddy: We tap in from day one to help the team, we do the right thing even if it’s hard.

Owners and Dates: We don’t chase people. If you own a task and agree to a date, the expectation is that it gets done.

Feedback: We want our employees to flourish, so we regularly provide direct and constructive feedback.

We’re Looking For

• Experience managing public cloud environments, ideally Azure.
• Strong experience writing infrastructure as code with Terraform.
• PowerShell proficiency.
• Good networking knowledge.

Nice to haves

• Experience with AI platforms or LLM APIs such as Anthropic, OpenAI or Microsoft Foundry.
• Experience running a multi-cloud setup (Azure and GCP).
• Experience with zero-trust networking or tools such as Cato.

Interview Process

• Stage 1: 30 minute call with a Talent Partner
• Stage 2: 75 minute technical tech & questions with the Core Infrastructure Team lead & Team member (Video call)
• Stage 3: 30 minute interview with our Head of Platform Diversity & Inclusion

We welcome, consider and encourage applications from anyone who shares our commitment to inclusivity. Join us in creating a space where authenticity thrives, and everyone can do their best work.

Great Work Deserves Great Perks

We try not to take ourselves too seriously (all the time) so we make sure our office is decked out with a pool table, arcade machine, beer tap, and a couple of office dogs thrown in for good measure.

Check out our benefits:

• Private Healthcare including dental and opticians services through Vitality
• Worldwide travel insurance through Vitality
• Anniversary Rewards (£250, £500, £750, 4-week fully paid sabbatical)
• Salary Sacrifice Pension Scheme up to 7% match
• Octopus EV Salary Sacrifice Scheme
• 28 days holiday (plus bank holidays)
• Annual Learning and Wellbeing Budget
• Enhanced Parental Leave
• Cycle to Work Scheme
• Season Ticket Loan
• 6 free therapy sessions per year
• Dog Friendly Offices
• Free drinks and snacks in our offices

Other Info

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