Cloud infrastructure and DevOps in London
A London payments or trading platform makes a promise about uptime to every customer, and infrastructure is where that promise is kept or broken. Which region does the service run in, how long does a restore actually take, what happens when the cloud provider or the payments gateway has a bad afternoon, and who has tested it lately.
We set up infrastructure as code, usually Terraform on AWS in the London region, with backups that are restored on a schedule rather than assumed, and runbooks that someone other than us can follow. We run the failure tests and write up the results, so your team knows what to expect before it happens. We also operate our own Kubernetes cluster for Amour, so our advice on running things comes from paging ourselves, not from slides.
Financial services drive more of London's software demand than any other sector. Payments companies, challenger banks, wealth platforms and brokers need ledgers that reconcile, APIs that stay correct when a partner retries, and apps customers trust with their money. Most of them reached the market fast, which was the right call at the time, and now run systems built for launch rather than for the size they have become. The work is making those systems dependable without stopping the business that runs on them.
Insurance is its own case. The specialty insurers, managing agents and brokers around Lloyd's still run much of their work on ageing policy administration platforms and spreadsheets that travel between firms by email. Lloyd's has moved away from Blueprint Two, the market-wide programme that was meant to digitise placement and claims, so each firm is modernising its own systems one integration at a time. The City's law firms and consultancies sit alongside them, holding decades of documents and few ways to search them by meaning.
Media, retail and the public sector bring different problems. Publishers run subscriptions, paywalls and content systems that have to hold up on a busy news day. Direct-to-consumer brands outgrow their first shop as they start selling into Europe and the US. Suppliers to councils and NHS bodies build services that have to work for every resident, including people using a keyboard or a screen reader. Hiring is the common constraint. ITJobsWatch puts the median advertised salary for a software engineer in London at £98,750 over the six months to September 2026, and banks, fintechs and the large technology firms compete for the same people.
Working with us from London is straightforward. Four hours of every working day overlap with yours, set across your morning, so stand-up, code review and the decisions that follow happen live. You talk to the engineer who writes the code, in your own Slack, GitHub and Linear. The rest of the day moves forward in pull requests you can read at your desk, with runbooks and architecture notes written as the work goes.
We are the right fit when you have a defined piece of work and need senior engineers on it this month rather than next quarter. Start with a fixed-price two-week piece and judge us on what ships. We add capacity while a London hire is still in progress, and we work white-label under your name for agencies.
Four ways this arrives.
Resources were created in the console over several years and nobody can say which ones matter. We inventory the account, bring what is live into Terraform, remove what is not, and hand you a repository that describes the whole estate.
It is usually idle capacity, oversized instances, forgotten environments and data transfer nobody priced. We find where the money goes, cut the obvious waste where you already are, and only then ask whether a cheaper provider such as Hetzner suits your steady workloads.
One person knows the steps and every release waits for them. We build a pipeline that tests, builds and deploys on merge, with rollback to the previous image, so shipping on a Friday afternoon is a decision rather than a gamble.
The channel fires all day, so everyone has muted it, so real outages are reported by customers. We alert on what users actually feel, route each alert to a named owner, and delete every alert nobody would act on at 3am.
A K3s cluster on Hetzner that we provisioned and are on call for, deployed through Flux, where only a push to master can produce an image production will run.
Read the write-up →Asked by London teams.
How do you work with teams in London?+
Four hours of every working day overlap with yours, set across your London morning, so stand-up and code review happen live. We join your calls and work in your tools: Slack, GitHub and Linear. You talk directly to the engineer who writes the code. Outside the overlap, the work carries on in pull requests you can read at your desk, and runbooks and architecture notes are written as we go.
Do you build for London fintechs and insurers?+
Yes. For payments companies, challenger banks and wealth platforms we build ledgers that reconcile, webhook handling that stays correct when a provider retries, and React Native apps with biometric sign-in and step-up checks for risky payments. For insurers, managing agents and brokers around Lloyd's we replace spreadsheet workflows with internal tools: bordereaux intake, referral queues and approvals, connected to the policy systems you already run.
How does your rate compare to hiring in London?+
ITJobsWatch puts the median advertised salary for a software engineer in London at roughly £99,000. Our published rate is $35/hour, with a $5,000 minimum engagement. There is no recruiting time and no employment overhead, and we can start within days of the first call. Most clients begin with a fixed-price two-week piece at $2,800, so you judge us on working code before committing to more.
Can you work white-label for a London agency?+
Yes. London agencies bring us in when a client project needs more senior backend, mobile or infrastructure work than the team has free. We work under your name, in your repositories and your client's tools, and you stay the face of the project. The NDA comes before specifics, the code belongs to the client from the first commit, and runbooks and architecture notes are written as we go.
Should we run our own Kubernetes cluster?+
Usually not. Self-hosting starts to pay when your managed bill is mostly things you do not use, your workloads are steady rather than spiky, and someone is willing to own the control plane. We run our own on Hetzner, so we know what that job involves. If nobody on your side wants it, managed is cheaper in total even when the invoice is larger.
Do we need Kubernetes at all?+
Often not. Plenty of products are better served by a managed container service, a platform like Railway, or two virtual machines and a good deploy script. Kubernetes earns its place when you run several services, have steady traffic and have people to look after it. We will recommend the least infrastructure that does the job, and say so when that is less than you expected.
Which clouds do you work with?+
AWS most often, then Google Cloud, Azure and Hetzner. We work in whichever one you are already on, because moving clouds is rarely the cheapest fix for a cost or reliability problem. If we think a move is worth it, we will show you the case using your own bill before anyone migrates anything.
Can you cut our cloud bill without a migration?+
Usually, yes. Most of a bill that has grown unchecked is idle capacity, oversized instances, environments left running and data transfer nobody priced, and all of that is fixed where you already are. We will not promise a percentage before we have read the bill. After the first week we can tell you what is realistic and what it takes to get there.
Who is on call?+
Whoever the engagement says, in writing. While we run your infrastructure it can be us, with hours and response times agreed up front. If you are taking it in-house, the handover includes the runbooks, the alert routing and a rota your team can actually staff. We do not leave behind a pager that only we know how to answer.