The process
Eight steps from idea
to launched product.
Building a minimum viable product follows a specific sequence. Skip a step and the MVP either takes too long, costs too much, or fails to validate anything. Here is the process we use at Wall & Fifth for every MVP build.
Define the hypothesis
What specific belief are you testing? Not "people want a better to-do app" — that is too vague. Something like "freelancers will pay £20/month for a tool that combines invoicing and project tracking in one interface." The clearer the hypothesis, the more useful the MVP.
Identify one core user
Pick the single most important person this product serves. Not "small businesses" — that is everyone. Something like "solo freelance designers billing £40k–£80k per year." The narrower the user, the sharper the product.
Map the critical path
What is the shortest sequence of actions from signup to value? For the freelancer tool: sign up → create a project → log time → generate an invoice → get paid. That path is your MVP. Everything else is deferred.
Cut everything else
Admin dashboards, analytics, email notifications, team features, third-party integrations, reporting — all deferred. Every feature you add extends the timeline and dilutes the test. Ruthless scoping is the hardest and most important skill in MVP development.
Choose the right technology
The tech stack determines whether your MVP can scale or needs to be rewritten. We use Next.js, React, TypeScript, and PostgreSQL — production-grade frameworks that grow with the product.
Build in structured sprints
Not a chaotic rush to ship. Structured phases: scoping in weeks 1–2, development in weeks 3–6, testing and launch in weeks 7–8. Each phase has clear deliverables and checkpoints.
Launch and learn
The last two steps are
the most important.
Most guides about building an MVP stop at launch. But the two steps that determine whether the MVP was worthwhile happen after the code is written.
01
Define success metrics before launch
What numbers tell you the idea works? 100 signups in the first month? 30% activation rate? 10% conversion to paid? Define these before you ship — not after — so the MVP gives you a clear signal rather than ambiguous noise.
02
Launch to real users and measure
Deploy the product. Put it in front of your target users. Watch what they do — not what they say. The data from the first 4 weeks tells you more than any amount of pre-launch research.
03
Read the signal honestly
If users sign up but do not complete the core action — the product has a UX problem. If they complete the action but do not return — the value proposition is weak. If they return but do not pay — the commercial model needs work. Each signal tells you exactly what to fix.
04
Iterate or pivot based on evidence
Strong signal: invest further, add features, scale. Weak signal: adjust the product, the pricing, or the audience. No signal: the hypothesis was wrong — pivot or move on. The MVP has done its job either way.
Deep dive
Scoping — the step that determines everything.
Scoping is where most MVPs succeed or fail. It is also the step that most founders rush through — because they are eager to start building. That eagerness costs them weeks of development time and thousands of pounds in features that did not need to exist yet.
Good scoping at Wall & Fifth produces three things:
- A clear hypothesis statement — one sentence describing what you are testing and what success looks like
- A user flow map — the exact sequence of screens and actions from signup to value delivery
- A feature boundary — an explicit list of what is in scope and what is deliberately deferred
The scoping phase takes two weeks. It feels slow when you are eager to build. It saves four weeks of rework downstream. Read the full MVP development process for the week-by-week breakdown.
Technology
Technology decisions for your minimum viable product.
The technology you choose for your minimum viable product determines whether you can scale it — or whether you need to throw it away and start over in 6 months.
We cover this in depth in our tech stack guide, but the short version: use production-grade frameworks from day one. The MVP is not throwaway code. It is the foundation you build on.
- Web apps: Next.js, React, TypeScript, PostgreSQL — the industry standard for modern web applications
- Mobile apps: React Native with Expo — one codebase for iOS and Android, native performance
- Deployment: Vercel with CI/CD, SSL, global CDN, zero-downtime deploys
- Payments: Stripe — subscriptions, one-time charges, invoicing, webhooks
If you are unsure whether to build a web app or mobile app, start with the web app. It is faster to build, faster to iterate, and does not require app store approval.
Watch out
The traps that kill minimum viable products.
We have built enough MVPs to see the same patterns repeat. The full list is on our MVP mistakes page, but the ones that kill the most projects:
- Scope creep — the MVP grows from 5 features to 40. It takes 6 months instead of 8 weeks. It is no longer minimum.
- Building for yourself instead of the user — founders design for their own mental model, not for a confused first-time user
- No commercial model — an MVP that users enjoy but cannot generate revenue has not validated a business
- No success metrics — launching without knowing what success looks like means you cannot tell if the MVP worked
- Choosing the wrong tech — starting with no-code and needing a full rebuild 6 months later costs more than building custom from day one
FAQ
Questions people usually have before the next step feels obvious.
How do you build a minimum viable product?
Define a hypothesis, identify one user type, map the critical path, cut everything else, build in sprints, define metrics, launch, and measure. The full process takes 8 weeks at Wall & Fifth.
How long does it take?
6 to 12 weeks for a well-scoped MVP. At Wall & Fifth, 8 weeks — scoping in weeks 1–2, development in weeks 3–6, testing and launch in weeks 7–8.
Can I build one without coding?
For very simple products, no-code can work. For anything with custom logic or growth potential, custom code is better. Or hire an MVP studio like Wall & Fifth to handle the technical work.
What should I build first?
The critical path — signup to value in the fewest possible steps. Authentication, core functionality, minimal interface. Everything else comes after validation.
How much does it cost?
At Wall & Fifth, from £16,000. Extensive builds at £30,000. Both fixed-price, 8-week delivery.
Related pages
Build it properly
Build your minimum viable
product with Wall & Fifth.
Tell us what you are building. We will help you scope it, price it, and deliver it in 8 weeks.