Services · Custom software and business systems

The system that replaces the spreadsheet.

Q: How do you estimate something that has never been built?

By building the riskiest part first. Discovery produces a scope, and the piece most likely to blow the estimate gets prototyped in the first weeks. After that, the rest of the plan is built on something real.

Q: Will the business have to stop while you switch systems?

No. We replace in stages. The old system keeps running next to the new one, and each part of the process moves across when the people doing it trust the replacement. Cut-over weekends are how data gets lost.

Q: Who owns the code and the data?

You do, both, in accounts in your name. Repositories, cloud accounts, databases and documentation are yours from day one. If the relationship ends, another team can pick it up from the README.

Q: Can you integrate with what we already use?

Yes. That is most of the work. Dynamics, Odoo, Zoho, Xero, QuickBooks, Shopify, courier and payment APIs and the custom system from 2011 with no documentation. We have met most of them.

Q: What does it cost to keep running?

Less than the spreadsheet, once you count the Mondays. Hosting is usually tens of dollars a month for an internal tool. A retainer covers updates, monitoring and the small changes the team asks for, and unused hours carry over.

Every growing company runs on one spreadsheet nobody dares change. We replace it with a system that has permissions, an audit trail and a backup, without stopping the work while we do it.

Internal tools, customer portals, integrations between the systems you already pay for, and the modernisation of the ones that have stopped being maintainable.

Get in touch See our work

Built for: Growing companies whose process has outgrown spreadsheets, email and the tools they were never meant to run on.
Typical timeline: A first usable slice in six to ten weeks; the system then grows release by release beside the old one.
What you own: Repositories, cloud accounts, databases and documentation, all in your name.
Rated: 4.7 / 5 from 23 Google reviews

200+ companies servedFrom a first store to an ADX listed developer

What you get

Software shaped to how the business actually works.

Where off the shelf stops fitting, this is what we build. We deliver custom software development in the UK for the business systems that off the shelf products do not fit: operations, approvals, pricing and reporting.

Explain your project

Node.js developers
APIs and services on the runtime most of the modern web runs on.
You get services your next hire can work on, documented and tested from the first sprint.
.NET developers
For companies already on Microsoft, where it fits the estate and the team.
Your IT team can run and extend what we build, because it fits the estate they already manage.
Python developers
Data pipelines, automation and the back ends behind AI features.
Your data moves without manual exports, and AI features have a back end to run on.
Java developers
Enterprise systems that have to run for a decade and be audited.
You get a system that passes an audit and is still running when the people who built it have moved on.
API development
Documented, versioned and secured, so the next integration is a day, not a project.
The next integration takes a day, not a month, because the contract is documented and versioned.
Systems integration
The CRM, the accounts package and the warehouse finally agreeing with each other.
Nobody retypes an order from one system into another, and the numbers agree at month end.
Legacy modernisation
Replacing the system everyone fears in stages, while it keeps running.
You retire the system everyone fears without a big bang cutover or a weekend of downtime.
Workflow automation
The approvals, hand-offs and chasing that currently live in email and WhatsApp.
Approvals stop living in email, and you can see where every request is stuck.
Database design
Schemas that survive the second year, with the reports you will want already possible.
The report you ask for in year two is possible without rebuilding the schema.
Cloud migration
From the server under the desk to infrastructure that is backed up, monitored and yours.
You get backups, monitoring and a documented setup instead of a server under a desk.

Who this is for

Three places custom software earns its keep.

Custom software is for when the process is the advantage, or when nothing on the market fits without a workaround worse than the spreadsheet. Three places it earns its keep. Most business systems we build need system integration with an ERP, a CRM or a website from day one.

The process is in a spreadsheet and three people's heads

We document how the work really flows, including the exceptions, then build the system around that. Permissions, history and a backup come as standard.

Exceptions documented first; that is where systems fail.

Your systems do not talk to each other

Orders retyped from one screen to another, reports built by hand every Monday. Integration is usually the highest return project a company has.

Usually the highest return project a company has.

The old system is holding the business back

Nobody dares upgrade it and the one person who understands it is leaving. We replace it in stages so nothing stops.

Replaced in stages, nothing stops.

Four phases, with the riskiest piece built first.

01DiscoverWe sit with the people who do the work, not only the people who manage it, and map the process including every exception. The exceptions are where systems fail.
02DesignData model and permissions before screens. The hardest integration or the ugliest edge case gets prototyped first, because that is where the estimate is wrong if it is wrong.
03BuildDelivered in slices the business can start using, with the old system still running beside it until each slice is trusted. No big bang cut-over.
04MeasureAdoption is the metric: who is using it, what they still do outside it, and what they ask for. That list drives the next release.

Selected work

Where this service has already shipped.

Two or three of the companies this lane has built for. The full list is on the work page.

Payments

PURPOSE PAYMENT

A payments product where compliance was designed in from the first sprint, not discovered at the security review.

Payment work carries requirements that are far cheaper to design for than to retrofit: how data is stored, who is allowed to see it, and what has to be provable afterwards. Those were settled before the build started rather than bolted on when the review came around.

View case

Real estate

MODON HOLDING

A corporate platform for a listed developer, built to survive an investor relations audit.

A listed company website is a disclosure surface, not a brochure. Governance documents, board changes and financial reporting all had to publish on a schedule, stay traceable and be correct in both languages, so the platform was built around approval and versioning rather than around the homepage.

View case

How we work together

Three ways to buy custom software.

Internal systems rarely finish; they keep adapting. The dedicated team model is the one most clients end up on. Clients come to us for custom software development in the UK that includes the system integration work connecting the new system to what they already run.

Fixed scope

A defined build with a deadline

We agree what the product has to do, write it down with a price and a date, and build exactly that. Changes are priced before they are made, not discovered on the invoice.

Written scope and acceptance criteria
Fixed price and delivery date
Weekly build on a URL you can open
30 days of fixes after launch

Get in touch

Dedicated team

A product that keeps evolving

Named engineers who work your hours, join your standups and stay on the codebase. You direct the backlog; we own the quality of what ships.

Senior engineers, not a rotating bench
Your tools, your repo, your process
Monthly, cancel with 30 days notice
A lead who answers for the team

Get in touch

Retainer

Something live that needs looking after

A monthly block of hours for improvements, fixes and the small requests that otherwise wait months. Unused hours carry for a quarter.

Agreed response times
Monitoring and dependency updates
A monthly report of what changed and why
Priority access to the same team that built it

Get in touch

Technology

What we build this with.

Chosen to fit the problem and the team who will own it afterwards.

01Web

React
Next.js
TypeScript
Node.js
Laravel
WordPress

02Data and cloud

PostgreSQL
MySQL
MongoDB
AWS
Azure
Docker

03Business platforms

Microsoft Dynamics 365
Business Central
Power Platform
Odoo

Questions people ask before commissioning software.

Why not just buy something off the shelf?

Often you should, and we will say so.

If a product covers eighty percent of the process and the other twenty can bend, buy it. Custom software is for when the process is the competitive advantage, or when nothing on the market fits without a worse workaround than the spreadsheet.

How do you estimate something that has never been built?

Will the business have to stop while you switch systems?

Who owns the code and the data?

Can you integrate with what we already use?

What does it cost to keep running?

Services that usually go with this one.

Microsoft Dynamics 365 and CRMDynamics 365 and Business Central set up so sales actually use them.Odoo and ERP implementationThe modules you will use, the data migrated properly, the rest switched off.Dedicated developers and teamsSenior engineers who join your standups and keep the hiring decision reversible.

Tell us what the business needs. We will tell you what to build first.

Schedule a free consultation and get a written recommendation, with costs, before you commit to anything.

Get in touch

PROVEN RESULTS

4.7 / 5from 23 Google reviews

The system that replaces the spreadsheet.

Software shaped to how the business actually works.

Node.js developers

.NET developers

Python developers

Java developers

API development

Systems integration

Legacy modernisation

Workflow automation

Database design

Cloud migration

Three places custom software earns its keep.

The process is in a spreadsheet and three people's heads

Your systems do not talk to each other

The old system is holding the business back

Four phases, with the riskiest piece built first.

Where this service has already shipped.

PURPOSE PAYMENT

MODON HOLDING

Three ways to buy custom software.

Fixed scope

Dedicated team

Retainer

What we build this with.

Questions people ask before commissioning software.

Services that usually go with this one.

Tell us what the business needs. We will tell you what to build first.