London, United Kingdom
Custom Software Development Company in London
If you want a custom software development company London fintech and SaaS teams can use alongside their own engineers, that is the job we are built for. BinaryBrill has 45+ senior, in-house engineers.
Senior engineers are expensive to hire in London, and scale-ups compete for the same few people. A dedicated team of senior engineers can work as an extension of yours instead. Delivery is remote from Mohali, India.
A senior engineer replies within 24 hours, not a sales rep.
Custom software development company London: who it is for
The firms that get most from us are London fintech and SaaS scale-ups with a working product and more to build than their team can carry. Hiring another senior engineer is slow. A dedicated team keeps the same senior engineers on your system while you set priorities.
We also take fixed-scope projects, such as a customer portal or a reporting platform. Either way, a senior engineer reads your enquiry and replies within 24 hours.
Signs your London business has outgrown off-the-shelf tools
Fintech: the workarounds are the product
Reconciliation lives in a spreadsheet, approvals happen by email, and one person knows how month-end figures are produced.
SaaS: every customer is an exception
Sales promise a custom plan, billing needs a manual fix and permissions are patched per account.
Professional services: the process lives in people's heads
Client onboarding, document checks and billing depend on who is in that week.
What we build for London teams
A dedicated team as your extension
Senior engineers who join your sprint rhythm, ticket board and review process. See dedicated development teams.
SaaS builds and rebuilds
New products, or the foundations of an existing one. See SaaS product development.
Bespoke platforms
Software shaped around how your firm works. See custom software development.
Legacy replacement
Moving a system that works but cannot grow onto something maintainable. See legacy system modernisation.
Automation and AI
Reconciliation, triage and reporting passed to software. See AI automation systems.
White-label work for agencies
London agencies can ask us to deliver under their name. See white-label development.
ERP and CRM work and integrations sit alongside these. See our services page.
Industries we work with in London
Fintech
Accurate ledgers, traceable changes and careful customer data come first. Your compliance lead reviews the design.
SaaS scale-ups
The priority is usually throughput. We find what slows your releases and fix that first.
Media
Content, rights and distribution data are spread across tools.
Professional services
Client portals and billing that match how the firm works.
Working across time zones with London
London is 5.5 hours behind IST in winter (GMT) and 4.5 hours behind in summer (BST). Shared hours are about 09:00 to 12:30 GMT in winter and 09:00 to 13:30 BST in summer.
| Sprint moment | When it happens |
|---|---|
| Sprint planning | Inside the shared morning |
| Working demo | Last session of each two-week sprint |
Integrations with the tools United Kingdom businesses use
London teams usually run on Xero, Sage or QuickBooks, with HubSpot, Salesforce or Microsoft Dynamics 365 on the customer side. We connect new software to them through their APIs. We claim no certified-partner status. If your accounting software is Making Tax Digital-compatible, we integrate the same way.
Data protection and compliance in United Kingdom
UK GDPR and the Data Protection Act 2018 apply to what we build for London clients. We sign a data processing agreement as standard. If you need data kept in the UK or EU, we can host in a region such as AWS London. We claim no certification. Your own legal adviser confirms the legal position.
Recent work
Prime Selection is an online retailer in Kuwait selling coffee, confectionery, sweeteners and household brands. It has a multi-brand catalogue with category filtering, reviews on product listings and special-offer merchandising, on mobile and desktop. See the Prime Selection case study or the wider portfolio.
Engagement models and pricing
We do not list prices, since a figure without your scope would be a guess.
- Dedicated team: senior engineers assigned to your product, working in your tools, for as long as the roadmap needs them.
- Fixed scope: a short paid discovery, then a written scope and a fixed price, delivered in two-week sprints with a demo each time.
- Handover and support: documentation comes with the work, so you can keep us on or hand the system to another team.
FAQs
How much does custom software development cost for a London business?
We do not give a number before we know the scope. A short paid discovery produces a written scope and a fixed price. For a dedicated team, we agree its shape before work starts.
How do you work with London teams across time zones?
We meet in the shared hours, about 09:00 to 12:30 GMT or 09:00 to 13:30 BST. Planning, decisions and demos go there. Written updates cover the rest.
Can you integrate with the tools we already use, such as Xero or Sage?
Yes, through their APIs. That covers Xero, Sage, QuickBooks, HubSpot, Salesforce and Microsoft Dynamics 365. We do not claim certified-partner status.
How do you handle data protection and privacy law in the United Kingdom?
We work to UK GDPR and Data Protection Act 2018 principles and sign a data processing agreement as standard. Hosting in a region such as AWS London is available when you need it. Your legal adviser confirms the legal position.
Who owns the code and IP?
You own all the code, IP, documentation and pipelines from day one.
Do you have an office in London?
No. We have no office, address or phone number in London. Our engineering centre is in Mohali (SAS Nagar), Punjab, India, and delivery is remote.
How soon will we see working software?
Sprints run for two weeks and each ends with a working demo. After the paid discovery, expect the first demo at the end of the first sprint.
Related locations
Tell us what your London team needs to build
Book a free consultation and describe the product, the gap in your team and the timeline you have in mind. A senior engineer replies within 24 hours.