Site Reliability Engineer

capitalontap

London · United Kingdom

Posted Jun 23, 2026

Other
Hybrid
IT

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

SRE at Capital On Tap 🌞

At Capital On Tap, we run a hybrid embedded SRE model. We aim to work closely with the teams within Capital On Tap to provide them the best support. Our main objective currently is to gain as much visibility into our platform's health while offering scalable solutions.

What You’ll be doing:

As a Site Reliability Engineer (SRE) you will help ensure our platforms are fast, reliable, and scalable. You’ll design, build, and monitor systems, prevent issues before they happen. Using SLAs, SLIs, and SLOs, you’ll guide feature launches while maintaining services that everyone can depend on.

Manage and automate Azure, Datadog, NGINX & Cloudflare
Develop and monitor Kubernetes and Serverless resources
Maintain infrastructure code with Terraform & CRDs / Crossplane
Improve systems, processes, and technologies; consult stakeholders to enhance platform performance
Getting involved in new application architecture & design processes
Design solutions to reduce toil, automate repetitive tasks and streamline workflows to reduce manual work and boost team productivity.
Create SLIs and SLOs; increase application visibility
Align with the Product team on SLAs and core service objectives
Collaborate with Platform Engineers for automated solutions and pipelines
Enhance user experience with infrastructure and pipeline optimisation
Support CI/CD tools such as Azure Devops, Octopus Deploy and Flux to streamline software delivery
Lead incident troubleshooting to safeguard customer experience

We’re Looking For 🔎
Required skills:

Experience in managing a public cloud (Azure advantageous)
Experience in Azure DevOps, Octopus, Flux or other CI/CD tools
Experience with Linux and Microsoft Systems
Excellent communication skills and ability to collaborate with multiple teams in an agile environment
Proficient in contributing to IaC technologies involving expertise in writing, managing, and optimising infrastructure with tools such as Terraform and Pulumi
Experience working with a cloud monitoring solution (advantageous to have DataDog)
Experience with Kubernetes and Docker
Experience in at least one scripting language (Python, PowerShell, Go)

Interview Process 🤝

First stage: 30-minute intro, CV review, and values with Talent Partner
Second stage: 60 minute “Tech Chat” with Team Manager
Final stage: 75-minute Technical Task + 30 minute Interview with Head of Platform Engineering

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
🏖️ 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
👍Check out our ‘Top Tips’ for interviewing.
✔️Keep updated on new job opportunities by following us on Linkedin.
📧Email careers@capitalontap.com if you have any questions.

Excited to work here? Apply!
If you’d 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.)