Hannibal Dev
Custom software development

Custom software development London and UK teams can reach, built around how you really work

Custom software development, London and UK-wide, for businesses that have outgrown spreadsheets and generic apps. We build custom web software around your real workflow: portals, internal tools, healthcare apps and full platforms your team actually wants to use. The first features go live in a month, and the system grows from there.

  • Speed

    1 mo

    to your first live features

  • Discovery

    3–5

    days living your process before we code

  • Changes

    ~1 hr

    for a typical small change once live

  • Licences

    0

    per-seat licence fees, ever

What we build

Custom web software development for the work no app was designed for

Custom software is worth it when your process is the thing that makes you different. These are the builds we do most.

  • Client and staff portals

    Role-based web apps for admins, teams and customers, each seeing exactly what they need.

  • Healthcare and clinic apps

    Bookings, reminders, records and practitioner dashboards, with permissions designed in from day one.

  • Platforms and MVPs

    Subscription platforms built from an idea to paying users, with the hard feature solved first.

  • Integrations and automation

    APIs like Zoom, SMS and email wired in, so links, reminders and records happen on their own.

  • Admin and analytics

    Live dashboards that follow each customer from first touch to paying client.

  • Secure content delivery

    Protected document viewers with personal watermarks, for businesses where one leaked file ends the model.

How we solve the hard part

A software development consultancy that tests every route

Most projects have one problem that decides whether the business works. On our exam platform it was stopping paid documents from leaking. We built a mobile app, which ethical hackers could bypass on the server side. We tried standard PDF readers and a Chrome-based approach used by well-known platforms, which one browser setting could switch off.

The client didn't want a desktop app either, because it would cut the conversion funnel. The answer was a DRM pipeline that runs in the browser, and it has held for more than 18 months. That is how we work as a software development consultancy: test honestly, keep the business goal in view, and only then commit.

Read the exam platform case study →

Outsourcing, done properly

An outsource software development company that behaves like your own team

Outsourcing goes wrong when nobody owns the result. We work as a small, stable team of 5 to 6, on UK hours, with the same developers from the first discovery day to the monthly missions after launch.

We move fast with AI-assisted development, without cutting corners on the database, and we build from scratch, extend an existing platform, or work with the technology you already use.

Custom vs off-the-shelf

Custom software, or a tool you already know?

Off-the-shelf is genuinely good for standard operations: a call centre, a business whose process doesn't change much year to year. Custom software makes more sense for the long term when your needs, feedback loops and operations keep evolving. There is no structural ceiling on how far it can go.

We learned this ourselves. Before building our own CRM, we used Odoo. Adding a single missing region to a location dropdown meant a quote, a wait and a bundle of changes. On a custom system, the same change takes about an hour with a developer who already knows the codebase.

Off-the-shelf

  • Fast to start, generic forever
  • Your team adapts to the tool
  • Changes via tickets and quotes
  • Cost grows with every seat

Custom software

  • Built on how you really work
  • Grows feature by feature
  • Small changes in about an hour
  • No per-seat licences
Process

Custom software development in four stages

We would rather ship features you use in month one than plan a huge platform and disappear for a year.

  1. Days 1–5

    We live your days

    We sit in on real work, play your customer, and message your own channels with hard requests on purpose to see where the process strains.

  2. Month 1

    Two or three core features

    We ship the features that remove the most manual work, and you validate them with your real team.

  3. Months 2–6

    The snowball

    Each new feature answers a real request from daily use, in the order that pays back fastest.

  4. After launch

    We stay close

    About one request a month until the system is mature, then monthly missions whenever you need more.

Want to talk it through right now?

Leave your number and a developer calls you back within minutes during UK working hours.

Pricing

What custom software costs, in London and everywhere else

People ask for numbers early, so here they are, from our own projects. As a custom software development company London clients compare with local agencies, we are usually well below their quotes because we don't carry city-centre overheads.

Which features come first is specific to you: lead capture if you generate leads, a collaboration layer if you run a sales team, calendars and payments once the core is stable. Past the six-month mark, most clients enter a year to eighteen months of lighter refinement. That is expected, not scope creep.

StageTimelineInvestment
Starter: one high-volume task2–4 weeks£1,000–2,000
Core features live~1 month~£3,000
Working version~3 months~£6,000
Mature system~6 months£6,000–12,000
Ongoing refinement6–24 monthsLight, monthly
London

Custom software London teams can reach, without a sales layer

If you are comparing options for custom software in London, ask every candidate the same three questions: who will actually write the code, how fast can a small change be made after launch, and what happens after month six. Our answers: the developers on your first call, about an hour, and monthly missions for as long as you need them.

Clients who searched for London custom software development tell us the same thing: they didn't want a sales team between them and their developers.

Consultants, not just coders

Software development consultants who tell you when not to build

Good software development consultants say no. If your process is standard, we point you to the off-the-shelf tool that fits and save you the budget. If it is specific and still evolving, we build it, and we start with two or three features so you can judge us on results before committing further.

Before you hire anyone

Three mistakes to avoid with your first custom build

  • Mistake 1

    An unreliable freelancer

    If one developer can't commit to real timelines or isn't consistently available, "two months" quietly becomes six, and six becomes indefinite.

  • Mistake 2

    Big words, shallow data

    Some agencies sell strategy and automation jargon. Custom software is a database and an interface, and the database is only as good as the team's understanding of your work. Treat something as unique that later needs to be many, and the fix costs you.

  • Mistake 3

    Building everything at once

    Start with two or three main features, work with them, see the results, then plan the rest. It validates the company and it validates the idea for you.

Have a process only your business runs?

Show us how it works today. We will sketch what the first month could look like on a free 30-minute call.

FAQ

Frequently asked questions

  • London agencies often quote big numbers up front. Our figures from real projects: about £3,000 for core features in month one, about £6,000 by month three, then about £1,000 a month to a mature system at six months (£6,000–12,000 in total). A small tool around one high-volume task can start at £1,000–2,000.

  • We work with London businesses every day, remotely and on UK hours, and you talk directly to your developers. We don't have a London office, which is a large part of why our pricing is lower.

  • Discovery (we live your process for a few days), database design, the web software itself, admin tools, integrations such as the Zoom API or SMS, hosting on our servers or yours, and light ongoing support after launch.

  • Yes. As a healthcare app development company we build patient, clinic and practitioner apps with role-based access, careful audit trails and the booking, reminder and record features your service needs. We scope data-protection requirements on the first call.

  • Outsourcing to a small, stable team is usually faster and cheaper until the product is mature. One of our clients considered hiring in-house once his platform matured, and chose to keep us on monthly missions instead because it cost less for the same results.

  • Yes. Press Get a call now, leave your number, and a developer calls you back within minutes during UK working hours.

Get a call now

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A developer calls you back within minutes, Monday to Friday, 9:00–18:00 UK time. Outside those hours, first thing the next working morning.

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