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Web app development for your team.

When spreadsheets and off-the-shelf tools stop fitting how you work, we design and build the web application that does: portals, dashboards and internal tools your team and customers log in to.

  • Designed around your process
  • Secure logins and permissions
  • Connected to your CRM and tools
  • You own the code
Build or buy?

What do you need to build?

Tell us who will use it and what it needs to do. We'll suggest an approach and a sensible first release.

What are you building?
Rough budget (optional)

Global
brand experience.

  • Louis-Dreyfus Foundation
  • Desucla
  • London Museum
  • Black Brick
  • Healthscope
  • Cupello
  • Enness Global
  • ACE Aquatec
  • JTI
  • Netacea

What is a custom web application?

Custom web application development is designing and building software that runs in the browser, shaped around one business's users and processes. Unlike a website, people log in to do things: manage orders, book work, approve requests or see their own data. A web application usually combines an interface, user accounts, business rules, integrations with other systems and a secure database.

Last reviewed 25 October 2026 by the Rubik Digital team.

  • In the browser

    Nothing to install, on any device.

  • Logged in

    Each user sees what their role allows.

  • Your rules

    Built around how the business works.

  • Connected

    Data shared with your other systems.

Years in business
15+
Global brands
50+
Industry sectors
13+

Sound familiar?

  • You

    Our whole operation runs on spreadsheets.

    Rubik Digital

    One application with a single source of data, so nobody works from an out-of-date copy.

  • You

    Customers email us for updates all day.

    Rubik Digital

    A customer portal where people log in to check status, download documents and request changes.

  • You

    We pay for five tools that don't talk to each other.

    Rubik Digital

    An application that replaces the overlap and connects to the tools worth keeping.

  • You

    Off-the-shelf software makes us work its way.

    Rubik Digital

    Software built around your process, with the steps, approvals and reports your team actually uses.

Built in layers, designed as one.

Every web application has the same layers underneath. Choose one to see what goes into it.

Every request passes through each layer, so we design them together.

Layer 1 of 6

Interface

Screens designed around the tasks people do every day, tested with the people who'll use them.

  • React · TypeScript
  • Accessible components
  • Works on any screen

A platform people
log in to.

We haven't published a web application case study yet. Cupello is the closest: a subscription platform we built from scratch for football coaches.

Sports Education Technology · Design · Development

Cupello

Cupello was built from the ground up as a digital platform for football coaches, covering product strategy, UX, design, and platform delivery.

Global subscribers
6,500+
Global subscribers
Organic visits
40K
Organic visits
Club partnerships
100+
Club partnerships
Read the Cupello case study

Small first, then grow.

We release a first version that does the core job well, then build on it from real use.

Start a project
  1. Discover

    Map the process.

    Workshops with the people who'll use it, to learn the tasks, data and rules.

  2. Prototype

    Test before building.

    Clickable screens your team tries before any code is written.

  3. Build

    Release in stages.

    Working software on a staging site every few weeks, starting with the riskiest parts.

  4. Launch and grow

    Improve from use.

    Go live, then add features based on how people actually use it.

Build custom or buy off the shelf?

Off-the-shelf software is often the right call. Switch views to see where a custom application earns its cost.

Showing: Off the shelf

Fit
You adapt to how it works
Cost
Monthly fees per user, forever
Integrations
Whatever the vendor supports
Changes
Wait for the vendor's roadmap
Ownership
You rent access

How much does a web app cost?

It depends on how many types of user and workflow it supports, how many systems it connects to and how much data moves across. We price the first release on its own after discovery, so you can launch the core and decide on the rest once it's proving itself.

Get a fixed proposal

What moves the price

  • Workflows

    How many tasks and approvals it handles.

    Effect on budget: High

  • Integrations

    Connections to CRM, finance and other tools.

    Effect on budget: High

  • User roles

    Each role adds screens and permissions.

    Effect on budget: Medium

  • Data migration

    Moving records from spreadsheets or old systems.

    Effect on budget: Medium

  • Reporting

    Dashboards and exports for managers.

    Effect on budget: Low

Why Rubik to build it?

We design and build in one team, so the people who map your process are the people who write the code.

Talk to the team

  1. Process first.

    We learn how the work gets done before we design a screen.

  2. Working software early.

    A first release in use quickly, then built on.

  3. Yours to keep.

    You own the code and data, with documentation to match.

  4. We stay after launch.

    Hosting, support and improvements from the team that built it.

What our clients say

Expert guidance and flawless execution. Our go‑to agency for all things digital.”
Nic CooperStrategy Director

Custom Web Application Development Questions,
answered.

What people usually ask us before a project starts. If yours isn't here, ask it in the form and someone senior will reply.

Ask the team

A website mainly publishes information and takes enquiries. In a web application, people log in to do things, such as managing orders, booking work or approving requests, and each person sees their own data.

Further reading.

All insights

Related services

Start a conversation

Ready to build software that fits?

Tell us who will use it and what it needs to do. We'll suggest an approach and a sensible first release.

Tell us about your project.

A few lines is plenty — no brief required.

What are you planning?