From idea to first customer

← All resources · 8 min read · Updated October 2026

Many experienced engineers have an idea they've been carrying for years. The biggest risk isn't technical; it's building something nobody pays for. This guide is about proving demand first.

1. Start with a problem you know

Your years in the industry are your advantage. Look for problems you have personally felt at work, that cost companies time or money, and where you know who has the budget to fix them. Write the problem in one sentence, without mentioning your solution.

2. Talk to 15–20 potential customers

• Use your network: former colleagues, managers and vendors.
• Ask about the past, not the future: "When did this last happen? What did you do? What did it cost?"
• Avoid pitching. If you hear "that would be cool", it isn't a yes.
• Look for patterns: the same pain described by many people, already being solved badly with spreadsheets or scripts.

3. Test with something small

• A one-page website describing the outcome, with a "Request early access" button.
• A manual service: do the job by hand for a few customers before automating it.
• A clickable mock-up to walk through in interviews.

4. Ask for commitment

The strongest signal is money, even a little: a paid pilot, a deposit or a signed letter of intent. Time is the next best: will they give you a weekly call, data or an introduction to their boss? Aim for three to five committed early customers before building a full product.

5. Build the smallest useful version

Solve one problem well for those first customers. Use managed services and off-the-shelf tools; skip features you can do by hand for now. Ship in weeks, not months, and keep talking to customers every week.

6. Agree the basics with co-founders early

• Roles and decisions. Who leads product, engineering and sales? Who has the final say on what?
• Equity and vesting. A common pattern is four-year vesting with a one-year cliff, so a co-founder who leaves early doesn't keep a large share.
• Time and money. Is everyone full-time? How long can each person go without income?
• Paperwork. Founders who receive stock subject to vesting often file an 83(b) election with the IRS within 30 days. Talk to a startup lawyer when you incorporate.
• Visa status. Founding or working on a company can affect visa status. Members on visas should get immigration advice first.

Where RestartHub helps

The Startup corner group is the place to share ideas, find co-founders with complementary skills and ask for customer introductions. The monthly meetup includes a co-founder matching round.

General information only, not legal, tax or investment advice.