10 mistakes domain experts make building their first product

1. Building before customers commit

Knowing an industry well makes it tempting to skip validation. Get letters of intent, and ideally deposits, before the build starts. See how to validate before you build.

2. A first release that tries to do everything

Insiders see every problem in the workflow and want to fix them all. A first release should do one job well. Write down what is not in it, and protect that list.

3. Choosing the cheapest quote

The cheapest quote is often the one that understood the least. Compare quotes on the written scope, the milestones, and what happens when something changes, not just the total.

4. Giving away too much equity, too early

A large stake handed to a developer before the product exists is a stake you cannot offer an investor or a key hire later. If equity is part of the deal, insist on vesting and a fixed maximum. See sweat equity for non-technical founders.

5. No written scope

Without a written scope, every disagreement becomes a negotiation. With one, a change is simply a priced change order, and both sides know where they stand.

6. Treating regulation as a later problem

GDPR, and sector rules such as FCA, CQC, NHS DSPT or FERPA, shape the architecture from the first day. Retrofitting them is expensive, and your first serious customer will ask about them in a supplier questionnaire.

7. Not being available

A build needs a few hours of the founder's time every week: decisions, pilot calls, testing. When the founder disappears into their day job, the build waits or guesses.

8. Not owning the accounts

The domain, the cloud account, the code repository and the app store listings should be in your company's name, or transfer to it on agreed terms. Find out before you start, not when you want to change supplier.

9. Confusing a trial release with a commercial one

A product your pilot customers tolerate is not the same as one strangers will pay for. Billing, onboarding, support and security sit between the two. Plan and budget for both.

10. No plan for after launch

Launch is the start of learning, not the end of spending. Keep budget and time for the changes the first months of real use will produce. See after launch: from trial release to a product that pays.

A checklist before you build

• Ten named target customers, and at least one letter of intent.
• The first release described as one job in one sentence.
• A written not-list.
• You know which rules touch the data.
• Budget for discovery and a proof slice, or a raise underway.
• Three to five hours a week for the build.

Our free readiness check turns this into a score, with the next step for wherever you are.