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Custom software development

Custom software built to be handed over, not held hostage.

Web applications, SaaS platforms, MVPs, internal tools and legacy modernisation — designed, built, deployed and maintained by senior engineers. Published pricing, fixed scopes, and you own the code, the infrastructure and the data in the contract.

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Serving founders, CTOs and operations teams across the USA, UK and Europe. Fixed price, fixed timeline, from 3 weeks.

What we build

Four kinds of build, one standard of engineering.

Web applications and product front ends

The interface your customers actually touch: fast, accessible, server-rendered where it matters for search, and built so the next developer can read it.

SaaS platforms and MVPs

A real product rather than a prototype — auth, billing, roles and the data model designed once, properly, so the second feature does not cost more than the first.

Internal tools and operations systems

The systems that replace a spreadsheet, four inboxes and a standing meeting: work queues, approvals, scheduling, reporting, wired into what you already run.

Legacy modernisation and rescues

Codebases nobody wants to touch, migrated in stages while the business keeps running. We start with a read-only audit before proposing a single change.

How we work

Scoped in days, shipped in weeks, handed over cleanly.

Every engagement is a fixed price against a fixed scope, agreed before a line is written. You see working software early and you keep everything at the end.
01

Scope

A free 45-minute call, then a fixed-price proposal within 72 hours. If the honest answer is that off-the-shelf software serves you better, that is what the call concludes.

02

Build in the open

Working software early and often, in your repository from day one, deployed where you can use it. No six-week silence ending in a demo.

03

Hand over properly

Documentation, infrastructure as code, and a walkthrough for whoever inherits it. Support retainer, improvement cycle, or clean exit — decided before we start, not after.

Who it fits

Built for teams shipping something real.

  • →Founders who need an MVP investors take seriously, not a clickable prototype
  • →CTOs who need senior engineering capacity without a six-month hiring cycle
  • →Operations teams whose process has outgrown spreadsheets and off-the-shelf tools
  • →Enterprise teams modernising a legacy system that cannot go offline to do it
Technical stack

Boring where it counts.

Usually TypeScript end to end, React or Next.js on the front, Node or Python services behind, Postgres, and AWS — chosen because you can hire for them. We will argue for the dull option over the fashionable one when the dull one is easier for you to maintain after we leave.

Proof

Production systems, named clients.

Two published case studies with the metric on the page, not a logo wall. Senior engineering measured on the outcome rather than the hours.
3.4x

activation via conversational onboarding

WhatNextAI
80%

of support tickets resolved automatically

Daytronx, SaaS
Related resources

Related field notes and proof.

Pricing

What property management software costs to build

A full custom platform priced module by module, with the five things that actually move the number.

Case study

EstateFlow AI: three systems on one record

A listing site, an operations platform and an AI marketing module built on shared property data.

Service

Mobile app development

When the product has to live on a phone: iOS and Android built against the same backend, on the same fixed-price terms.

FAQ

Things teams ask us first.

Need a clearer answer? Ask directly. We reply within 24 hours.
How much does custom software development cost?
A focused build — a listing site, a booking flow, a single-purpose internal tool — runs $5,000-$12,000 over 3-5 weeks. An operational system with integrations, roles and automation is $12,000-$30,000 over 5-9 weeks. A full platform with several modules on shared data is $30,000-$75,000 over 10-16 weeks. We publish these rather than hiding them behind a discovery call.
Can you take over an existing codebase?
Yes, and it is a large share of the work. We start with a read-only audit: what the system does, where it is fragile, what is safe to change first. You get that assessment whether or not you continue with us — it is useful on its own, and it is the only honest way to quote a rescue.
Who owns the code?
You do — the code, the infrastructure definitions, the data and the documentation, in the contract. No per-seat licence on your own system, no vendor lock-in, and no situation where leaving us means rebuilding.
What stack do you build on?
Whatever fits the problem and the team who will inherit it. In practice that is usually TypeScript across the stack, React or Next.js on the front end, Node or Python services behind it, Postgres, and AWS. We will argue for a boring choice over a fashionable one when the boring one is easier for you to hire for.
Do you build web applications as well as backend systems?
Both, and usually together. A web application without a coherent API and data model becomes unmaintainable, and a backend nobody can use is not a product. We design and build the whole path — interface, API, database, deployment.
What happens after launch?
Your choice of three: a support retainer, a fixed-scope improvement cycle, or a clean handover with documentation and a walkthrough for your own team. We are explicit about this before we start, because a handover planned at the end is a handover done badly.
How is this different from hiring a developer or an offshore team?
Scope and accountability. You get senior engineers who design, build, deploy and maintain the system rather than implementing tickets, on a fixed price and a fixed timeline. If a project is better served by you hiring in-house, we will say so on the first call.
How quickly can you start?
Discovery is a free 45-minute call, and a scoped fixed-price proposal follows within 72 hours. Build slots typically open within one to two weeks.
Related services

Explore connected service pages.

AI agent developmentAI chatbot developmentRAG developmentVoice AI agentsWhatsApp chatbots

Ready for a number instead of a range?

A free 45-minute call, then a fixed-price proposal within 72 hours — including the version where we tell you not to build it.

Get a free consultation →contact@theprocoders.com