DataHill

Digital Product Development

We design and build web and mobile products with one team from first sketch to launch, shipping something you can use every week, so you see progress long before the release date.

Overview

Most product projects go wrong in the gap between design and engineering. Designs are handed over and then reinterpreted, scope grows quietly, and the first time anyone uses the product is near the end. A single team that designs, builds, and tests together closes that gap, and a working build every week keeps everyone honest about progress.

One team from design to launch
Designers and engineers work side by side, so what is designed is what gets built, and trade-offs are made in the open.
Something to use every week
Each week ends with a build you can click through on your phone or browser, not a status report.
Built so you can take it over
Clean code, documentation, and a design system your own team can extend without us.

What we build

Everything needed to take a product from idea to something real people use.

Product design
User flows, interface design, and a design system, tested with real users before anything is built.
Web applications
Fast, accessible web products built with modern frameworks and connected to your existing systems.
Mobile applications
iOS and Android apps, native or cross-platform, chosen to suit what the product needs to do.
APIs and integrations
Back ends and connections to payments, identity, CRM, and the internal systems your product relies on.
Accessibility and performance
Built to WCAG standards and checked for speed on ordinary phones and connections, not just on our own machines.
Launch and handover
Release planning, store submission, analytics set up, and a structured handover to your team.

Decisions along the way

The choices that shape a product most, and how we help you make them with evidence rather than opinion.

  • What should the first version include?

    What we bring

    We rank features by value and effort with you, and cut anything that does not help real users in the first release.

    What you get

    A short, agreed scope for release one, and a clear list of what comes after.

  • Native, cross-platform, or web only?

    What we bring

    We compare the options against your users, budget, and the features you need from the device.

    What you get

    A recommendation with reasons, and the cost of changing your mind later.

  • Build it ourselves, buy it, or mix?

    What we bring

    We check what existing services cover, so you only pay to build what makes your product different.

    What you get

    A list of what to buy, what to build, and the running cost of each.

  • How do we know it works for users?

    What we bring

    Prototype tests before build, then usability sessions on early versions, with changes made from what we see.

    What you get

    Findings after each round, and fixes in the next build.

  • Who looks after it after launch?

    What we bring

    We plan handover or ongoing support during the build, not at the end.

    What you get

    Either a trained internal team, or a support agreement ready on launch day.

Approach

Short cycles with working software at the end of each one, so you can change direction cheaply.

  1. Phase 1

    2 weeks

    Kick off

    • Agree goals, users, and what success looks like
    • Map the main user journeys and the systems the product touches
    • Set up the repository, build pipeline, and shared design files

    You receive

    Agreed scope for release one, a plan, and a working empty app.

  2. Phase 2

    2 to 3 weeks

    Design

    • Design the key flows and build a clickable prototype
    • Test the prototype with five to eight real users
    • Create the first version of the design system

    You receive

    Tested designs and a design system ready for engineers.

  3. Phase 3

    6 to 10 weeks

    Build

    • Build in one-week cycles, each ending with a usable release
    • Test automatically on every change, and manually before each release
    • Review progress with you every week and adjust the plan

    You receive

    A working product in a staging environment, updated weekly.

  4. Phase 4

    2 weeks

    Launch and hand over

    • Final testing for security, accessibility, and performance
    • Release to users, with monitoring and analytics switched on
    • Walk your team through the code, tools, and how to release changes

    You receive

    A live product, documentation, and a trained team.

Engagement models

Pick the shape that matches how much you know today. You can move from one to another as the product matures.

Prototype sprint

Teams with an idea who want to see and test it before committing to a build.

3 to 4 weeks

  • User research
  • Clickable prototype
  • Usability test with real users
  • Costed build plan

Build to launch

Teams with a clear scope who want a finished product delivered.

10 to 16 weeks

  • Design, build, and test by one team
  • Weekly shippable builds
  • Launch support
  • Handover to your team

Dedicated product team

Products that will keep evolving and need steady delivery over time.

Monthly, rolling

  • Stable team of designers and engineers
  • Shared roadmap
  • Monthly planning review
  • Scale up or down with notice

Quality and tools

How we keep what we build secure, accessible, and easy for your own team to take over.

How we build

You own everything
Code, designs, and accounts are in your name from the first day, so nothing is locked behind us.
Security from the start
Threat checks at design, dependency scanning on every change, and a security review before launch.
Accessible by default
We test with keyboards and screen readers throughout, not only at the end.
Privacy by design
We collect only the data the product needs, and record where it is stored and who can see it.
Clear documentation
Setup guides, decisions, and release steps are written down in the repository as we go.

Tools we use

Design
Figma, FigJam, Storybook, Maze, UserTesting
Web
TypeScript, React, Next.js, Tailwind CSS, Node.js
Mobile
React Native, Swift, Kotlin, Expo
Back end and data
Node.js, Python, PostgreSQL, REST and GraphQL APIs
Quality
Playwright, Jest, Axe, Lighthouse, Sentry
Delivery
GitHub, GitHub Actions, Azure DevOps, Linear, Jira

We choose tools your team can keep using, and we are happy to work with the ones you already have.

Frequently asked questions

Do you build from our designs, or design too?

Either. We can build from designs you already have, or run design and engineering as one team. The second usually gives better results.

How do you handle changes in scope?

We plan in one-week cycles, so you can swap priorities each week. Anything that adds work is shown with its effect on date and cost before we agree it.

Who owns the code?

You do. It lives in your repository from day one, along with the design files and accounts.

Can you work with our in-house developers?

Yes. Many projects mix our people with yours, and we agree on standards and reviews up front so the code reads as one.

What happens after launch?

You can take it over with our handover, keep a smaller team with us, or move to a support agreement. We plan that before launch.

Have an idea or a product that needs rebuilding? Tell us who it is for and what it must do, and we will outline a first plan.

Book a discovery call

Start a conversation

Tell us your challenge. We'll show you what's possible with AI.

hello@datahill.com