All services Custom software development

Custom web applications built and run by the same senior team

New applications from discovery to launch, existing codebases taken over and run properly, and ongoing maintenance and security work afterwards — by the engineers who know how your system is built.

The discovery conversation costs nothing, and scoped work is quoted at a fixed price, in writing, before anything is built.

  • 20+

    Years in enterprise IT

  • 300+

    Clients served

  • 100%

    Job success

  • 5.0

    Average rating

  • $1M

    Insured

What we do

Software that fits how your business actually works

Five ways we take on custom software: building it, extending the platforms you already sell on, running someone else’s code, keeping it alive, and finding what is exposed.

Web application development

New builds, from discovery through to launch.

Most businesses end up running on a set of tools that nearly fit, plus a spreadsheet and a person who remembers the exceptions. We build the software that replaces that: an application shaped around how the business actually works, rather than a process reshaped around someone else’s product.

The same senior engineers who design it write it and run it afterwards, so the decisions made in week one are made by the people who will live with them.

  • Customer and client portals
  • Internal tools and admin systems
  • Reporting and operational dashboards
  • Integrations between the systems you already run
  • Automations that remove repetitive manual work
  • APIs for your own applications and your partners’
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Marketplace apps and plugins

Software that extends a platform your customers already use.

Not everything should be a standalone application. When the people you serve already work inside Shopify or WordPress all day, the useful thing to build is an app or plugin that extends what they have — installed where they expect it, working on the data already there.

That means building against someone else’s API, release cycle and review process. The platform’s constraints shape the work before the first line of code, which is the part that catches teams out when they treat it as an ordinary build.

  • Shopify apps, including private apps built for one store
  • WordPress and WooCommerce plugins
  • Storefront and theme work beyond what the platform settings allow
  • Integrations between a marketplace platform and the systems behind it
  • Taking over an existing app or plugin and keeping it current as the platform’s API moves
  • Preparing a submission and getting it through the platform’s app review
  • Maintaining a published listing as the platform’s requirements change
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Custom development management

Taking over an existing codebase and running it properly.

Inheriting an application built by a previous developer or agency is the normal case, not the awkward one. We start by reading it: what it does, what it depends on, where the risk sits, and what has been deferred.

From there the application gets the process it should have had — every change reviewed, released deliberately, and tested somewhere that is not production. Where you have your own developers or another vendor still contributing, we review and coordinate that work rather than fencing it off.

  • Codebase review and written assessment
  • A branch, pull-request and release process
  • Code review on every change
  • Staging environments that mirror production
  • Managing contributions from your other developers and vendors
  • Documentation and handover notes that outlive one engineer
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On-call maintenance

Ongoing care of an application that is live and being used.

Shipping an application is the start of its life, not the end. Dependencies go out of date, a library picks up a CVE, an edge case nobody modelled turns into a support ticket at the wrong hour.

Ongoing maintenance covers that work as a standing responsibility rather than a series of emergencies: the application is watched, kept current, and fixed by people who already know how it is built.

It runs as a monthly arrangement scoped to your application, quoted alongside the build or after a review of something you already have. It is not metered by ticket.

  • Dependency and framework updates
  • Security updates and patching
  • Bug fixes and regression work
  • Monitoring and error tracking
  • Incident response when something breaks
  • Performance investigation as the application grows
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Security auditing

Finding what is exposed, then closing it.

An application is only as secure as the weakest layer under it, and the layers are rarely audited together. We read the code, the dependency tree, the access model and the infrastructure it runs on as one system.

The output is not a scanner report. It is a prioritised list of what is actually exploitable in your context, and the remediation work to close it.

  • Application code audit
  • Dependency and supply-chain review
  • Vulnerability remediation
  • Access, permission and role review
  • Secrets and credential handling review
  • Hardening of the servers and cloud accounts the application runs on
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Why Clarkes.Team

Not a body shop, and not a ticket queue

The product is experienced engineers taking responsibility for a system your business runs on.

The people who build it, run it

The engineers who design your application write it, launch it and maintain it. Nothing is handed from a build team to a support queue, so nobody has to rediscover why a decision was made.

Senior engineers taking ownership

You are working with experienced engineers who take responsibility for the outcome, not executing a ticket queue at the lowest achievable rate. Where the brief is wrong, we say so before building it.

Code written to be inherited

Reviewed pull requests, a real release process, staging environments and written documentation. Your application should survive any one engineer leaving — including ours.

The whole stack, one team

We build applications and we run the servers and cloud environments under them. An incident that crosses from the code into the infrastructure does not stall at a handover boundary.

The stack

The whole stack, not one layer of it

What we build with, and run in production. Each name with a guide behind it links to it.

Frontend

What the person using the application actually touches.

Backend

The application logic, the APIs and the jobs behind them.

  • Laravel
  • PHP
  • Node.js
  • Python

Data

Where the records live, and how they are kept safe and fast.

  • MySQL
  • PostgreSQL
  • Supabase
  • Redis

Infrastructure

The cloud accounts and services the application runs on.

Delivery and monitoring

How a change reaches production, and how we know it behaved.

  • GitHub Actions
  • Docker
  • Terraform
  • Sentry

Platforms

The marketplaces and CMSes we build apps and plugins for.

Integrations

The outside services an application has to speak to.

  • Stripe
  • Twilio

Mobile

Native iOS, for the cases a web application is not the right answer.

  • Swift

AI

Models built into a workflow where they earn their place.

  • Claude
  • OpenAI

Running something not listed here? Tell us what it is built on

How it works

How an engagement runs

A fixed price before the build, and the build while it happens.

  1. 01

    Discovery

    We learn the process the software has to serve: who uses it, what the exceptions are, which systems it has to talk to, and what is genuinely required versus assumed. This conversation costs nothing.

  2. 02

    Plan and fixed price

    You get a written plan and a fixed price for the scoped work before anything is built — scope, sequence and what is explicitly out of scope. If discovery changes the picture, you see that before committing to anything.

  3. 03

    Build in reviewed pull requests

    Every change goes through a pull request and code review, and lands on a staging environment you can use. You watch it take shape rather than waiting for a reveal.

  4. 04

    Launch

    A planned release: data migrated, environments configured, monitoring and error tracking in place before go-live rather than after the first incident.

  5. 05

    Ongoing maintenance

    The application stays with the team that built it — dependency and security updates, bug fixes, monitoring and incident response as a standing arrangement.

100% job success on Upwork

What clients say about working with us

Reviews collected independently, not curated by us.

Before you ask

Questions worth asking first

Can you take over an application another developer built?

That is a normal engagement, not an exception. We start with a codebase review and a written assessment — what the application does, what it depends on, where the risk is and what has been deferred — and then put a branch, pull-request and release process around it. Where the original developer or agency is still involved, we review and coordinate their contributions rather than excluding them.

Who owns the code?

You do. Work built specifically for you becomes yours on full payment, including the repository history — our terms say the same. The exception is the general-purpose tooling and know-how we bring with us, which stays ours and is not something you would want to be billed to own. If you would rather the code lived in your own GitHub organization from day one, that is where we build it, and we work as collaborators in your organization.

Do you work in our GitHub organization?

Yes, where you want us to — we are comfortable working as collaborators inside your organization, against your branch protection and review rules. Where you do not have one yet, we can build in ours and transfer the repository to you.

What happens after launch?

Launch is a milestone, not the end of the engagement. Ongoing maintenance runs as a monthly arrangement scoped to your application: dependency and security updates, bug fixes, monitoring and error tracking, and incident response when something breaks — handled by the engineers who already know how the application is built, and not metered by ticket. It is quoted alongside the build, and it is optional: the code is yours either way.

How do you scope and price a project?

The discovery conversation costs nothing. From it you get a written plan and a fixed price for the scoped work before any code is written — scope, sequence and the explicit exclusions agreed up front. If discovery changes the picture, you see that before committing to the build rather than halfway through it. Smaller pieces of work that do not need scoping that way can run against On-Demand Support hours instead.

Can you work alongside our own developers?

Yes. Reviewing and coordinating other developers’ contributions is part of custom development management: the same branch, pull-request and release process applies to everyone contributing, including us.

Will you audit an application you did not build?

Yes, and it is often the first piece of work. A security audit reads the application code, the dependency tree, the access and secrets model and the infrastructure underneath as one system, and produces a prioritised list of what is actually exploitable in your context, with the remediation to close it.

Do you also manage the infrastructure the application runs on?

We do, and the two are usually the same conversation. Servers and cloud environments are sold as their own services — Server Management per server, Managed Infrastructure per environment — so an application we build or run can sit on infrastructure the same team operates, with no handover boundary in the middle of an incident.

Something not covered here? Talk to an engineer

Tell us what the software needs to do

A new application, an existing codebase that needs a proper home, or an audit of something already live. The first conversation costs nothing, and you get a written plan and a fixed price for the scoped work before any code is written.