United Kingdom

Custom Software Development Company in the UK

Looking for a custom software development company UK firms can work with during their own working day? BinaryBrill is a software engineering consultancy with 45+ senior, in-house engineers. We build custom software for UK businesses and agencies that have outgrown off-the-shelf tools.

Our engineering centre is in Mohali, Punjab, India, and delivery is remote. That is a trade-off. You get senior people, a written scope and shared hours every working day. You do not get an office down the road. The work usually takes one of four shapes: a dedicated team, white-label delivery for a firm or agency, a build that respects UK data protection law from the first sprint, or the careful modernisation of a legacy system.

A senior engineer replies within 24 hours, not a sales rep.

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Custom software development company UK: who it is for

We work with startups and established companies that have outgrown off-the-shelf software. In the UK that tends to mean a scale-up whose product has outpaced its engineering team, a professional services firm running on spreadsheets, an agency that sells software work but does not want to staff every build, or a business whose core system is old, still runs the company and worries everyone who has to change it.

A senior engineer, not a sales rep, replies to your enquiry within 24 hours. A short paid discovery follows and ends with a fixed scope and a fixed price, written down. We would rather tell you early that packaged software already does the job. The people who demo the work wrote it, and you own the code, the IP, the documentation and the pipelines from day one.

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Why United Kingdom companies work with an engineering team in India

Hiring senior engineers locally is slow. Searches take a long time, offers compete with larger employers and a poor hire is costly to undo. For a small firm, or an agency whose demand rises and falls, a permanent team is also a fixed commitment set against uneven work. An engineering team in India changes that. It does not remove the need for good management on either side.

Our Mohali team covers the stack most UK products need: web and mobile applications, SaaS, ERP and CRM, integrations, data and BI, cloud and DevOps, and AI and LLM applications. Offshore software development in India has a reputation for work thrown over a wall. Ours is built around short sprints, working demos you can attend and documentation written for whoever picks the system up next.

The overlap in hours is real but limited. It suits planning, review and decisions, not sitting in the same room. It runs smoothly when tickets are clear and decisions are written down.

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What we build for UK businesses

If you want to outsource software development in the United Kingdom without losing control of it, the shape of the engagement matters as much as the code.

Dedicated teams

Senior engineers who work only on your product, in your tools. It suits firms that need steady capacity for a year, not a quarter. See dedicated development teams.

White-label delivery

We build under your name for your clients, and you keep the relationship. It suits UK agencies and consultancies. See white-label development.

Custom software

Bespoke platforms, portals and operations tools for the workflow no package fits. Start with custom software development.

SaaS products

From a first usable version to the billing, permissions and multi-tenant foundations a growing product needs. See SaaS product development.

Legacy modernisation

We map what an old system really does before touching it, then replace it in steps. See legacy system modernisation.

AI and automation

Repetitive work handed to software, with a person kept in the loop where judgement matters. See AI automation systems.

We also build ERP and CRM systems, integrations, data and BI platforms and cloud pipelines. The full list is on our services page.

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Cities we serve in United Kingdom

Delivery is remote, so we serve the whole of the UK from one team.

London

Fintech and SaaS scale-ups, media businesses and professional services firms often want senior engineers on a flexible basis. Our London page covers that, including the dedicated team option.

Manchester

Teams in Manchester work with us as anywhere in the UK does: remote delivery from Mohali, shared mornings and a fixed scope.

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Industries we work with in United Kingdom

These are sectors whose needs we understand. Here is how we would approach each.

Fintech and financial services

Teams here need dependable records, clear audit trails and careful handling of customer data. We involve your compliance lead early, because the regulatory position is yours to confirm.

SaaS scale-ups

The usual pain is a product that outgrew its foundations: tangled permissions, billing exceptions and a backlog bigger than the team. We tend to steady the base before adding features.

E-commerce

Many brands, stock and order flows, promotions and a storefront that works on a phone. The hard part is keeping catalogue, offers and orders consistent.

Professional services

Client portals, document workflows, and time and billing that connect to the accounting package. We replace spreadsheets one process at a time.

Manufacturing

Order handling, production tracking and ERP links, often next to an older system nobody wants to switch off. We keep it running while we build around it.

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How we work across time zones

The UK is 5.5 hours behind IST in winter and 4.5 hours behind in summer. The table shows where our day and yours meet.

SeasonOffset from ISTShared hours
Winter (GMT)UK is 5.5 hours behindAbout 09:00 to 12:30 GMT (14:30 to 18:00 IST)
Summer (BST)UK is 4.5 hours behindAbout 09:00 to 13:30 BST

We use the shared window for sprint planning, urgent questions and the demo that closes each two-week sprint. Outside it we work asynchronously, and a question raised late in your afternoon will usually wait until the next morning.

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Integrations with the tools United Kingdom businesses use

We build integrations through each tool's API and make no claim of certified-partner status with any vendor.

  • Xero, Sage and QuickBooks: invoices, contacts and payments moved between your product and the ledger.
  • HubSpot and Salesforce: customer and deal data shared with the software you are building.
  • Microsoft Dynamics 365: links to operations and finance data held in it.
  • HMRC Making Tax Digital-compatible software: we integrate through the tools' APIs. Your accountant confirms what your filing requires.

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Data protection and compliance

UK data protection rests on UK GDPR and the Data Protection Act 2018. For UK clients we treat both as defaults. A data processing agreement is standard, and we design with the principles in mind: collect only what the product needs, limit access by role, and make export and deletion possible.

Where you need data kept in the UK or the EU, we can host in a region such as AWS London. Our engineers are in India, so personal data may be reached from outside the UK. We raise that in discovery so the contract and access set-up reflect it. We claim no certification, and your own legal adviser confirms the legal position.

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Recent work

Prime Selection is an online retailer in Kuwait carrying coffee, confectionery, sweeteners and household brands, trading in Kuwaiti dinar. The storefront has a multi-brand catalogue with category filtering, customer reviews on product listings, and special-offer and top-selling product merchandising. It works on mobile as well as desktop.

Any multi-brand retailer faces the same questions: how to organise many brands, show offers and keep the experience good on a phone. Read the Prime Selection case study or browse our wider portfolio.

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Engagement models and pricing

We do not publish a price list, because the honest answer depends on what you are building. Here is how the money works.

  • Fixed scope and price: a short paid discovery produces a written scope and one price. Work then runs in two-week sprints with a working demo each time.
  • Dedicated team: senior engineers assigned to your product for as long as you need them, managed in your tools.
  • White-label: we build for your clients under your brand and handle delivery.
  • Handover: documentation and pipelines are yours, so you can keep working with us or move to another team.

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FAQs

How much does custom software development cost for a United Kingdom business?

We do not publish a price list, because the cost depends on scope. A short paid discovery produces a written scope, and from that you receive a fixed price. Describe the product when you enquire and a senior engineer will explain what drives the cost.

The UK is 5.5 hours behind IST in winter and 4.5 hours behind in summer. Shared hours run from about 09:00 to 12:30 GMT in winter and 09:00 to 13:30 BST in summer. We hold planning and demos in that window and work asynchronously outside it.

Yes. We build integrations through the APIs of tools such as Xero, Sage, QuickBooks, HubSpot, Salesforce and Microsoft Dynamics 365. We do not claim certified-partner status with any of them.

We build with UK GDPR and the Data Protection Act 2018 in mind, and a data processing agreement is standard. We can host in a UK or EU region such as AWS London when you need it. Your own legal adviser confirms the legal position.

You do. You own all code, IP, documentation and pipelines from day one.

No. We have no office, address or phone number in the UK. Delivery is remote from our engineering centre in Mohali (SAS Nagar), Punjab, India.

Each sprint lasts two weeks and ends with a working demo. After the short paid discovery, your first demo comes at the end of the first sprint, and we say plainly what will and will not be ready.

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Talk to a senior engineer about your UK project

Book a free consultation and tell us what you need built, whether that is a dedicated team, white-label delivery or a system that needs modernising. A senior engineer replies within 24 hours.