Platform Engineer

Were Capital on Tap
Capital on Tap started because small businesses were underserved. Big banks were slow their products werent fit for purpose and small business owners often couldnt access what they needed. We set out to fix that.

Today were 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.

1000 employees 20bn in annual card spend 200000 customers 17000 Trustpilot reviews averaging 4.7 stars and were profitable. Weve done a pretty good job so far but were just getting started!

London Old Street 2 Days in Office

Core Infrastructure at Capital on Tap
Core Infrastructures 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. Its a big year for the team: were consolidating how we manage access and secrets modernising our edge moving to GitHub and exploring a multi-cloud future.

Were 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 Youll 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 its hard.
• Owners and Dates: We dont 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.

Were Looking For

• Experience managing public cloud environments ideally Azure.
• Strong experience writing infrastructure as code with Terraform.
• Hands-on experience with Kubernetes and Docker.
• Good networking knowledge including DNS load balancing TLS and CDNs or WAFs such as Cloudflare.
• Experience with cloud identity and access management RBAC and secrets management.
• Experience building CI/CD pipelines (Azure DevOps GitHub Actions or similar).
• Proficiency in a scripting language such as Go Rust PowerShell or Python.
• Someone who embraces AI as part of how they work moves faster automates repetitive stuff and focuses on the problems that matter while knowing when to apply their own judgement.
• Good communication skills and the ability to work across teams.

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 (-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

Check out more of our benefits values and mission here.

Other Info
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Excited to work here Apply!
If youd like to progress your career within our fast growing profitable fintech then click apply and we will aim to get back to you within 3 working days (during busy periods this could take up to 5 working days.)