Building the Product

What are the warning signs a developer is building the wrong thing?

A starting point

The biggest red flag is silence: weeks of "almost done" with nothing you can click. Watch for a developer who keeps adding infrastructure and "scalability" before a single user has touched the product, or who resists showing you rough, unfinished work. Insist on seeing something usable early and often, because the fix is cheap in week one and brutal in month three.

Go deeper

Hand-picked from around the web, each with a note on why it earns your time.

3 resources 3 link-checked Watch Read

Watch

▶️ Video
✓ Link checked Free Beginner

Why we picked it Michael Seibel has watched thousands of early teams up close, and here he walks through the patterns that sink first-timers, including pouring months into building something before checking that anyone wants it. For a first-time founder it helps you hear the warning signs in a real voice rather than a checklist, so you recognize them live when your own build starts drifting. It is broad on purpose, which is useful when you are still learning what "wrong thing" even looks like.

The Biggest Mistakes First-Time Founders Make

On Y Combinator (YouTube) by Michael Seibel

The Biggest Mistakes First-Time Founders Make
  • The most expensive mistake is building at length before validating, so the fix is getting something in front of real users early.
  • Founder and builder need to stay close to the customer; delegating the whole product and going quiet is how teams end up shipping the wrong thing.
  • Seibel frames these as recurring, avoidable patterns, which makes it easier to catch yourself repeating them.
Watch on YouTube youtube.com →

Read

📄 Article
✓ Link checked Free Beginner

Why we picked it This is the most concrete checklist we found for a founder who cannot read the code but can watch the behavior. It names the exact tells (demos that keep slipping, a developer who cannot explain the architecture, everything deferred to later) that usually mean the build has drifted off course. It is written for the person doing the watching, not for engineers, which is the whole point here.

10 Software Development Red Flags Every Non-Technical Founder Should Know

From VeryCreatives by Mate Varkonyi

  • When demos are repeatedly postponed, the honest read is usually that there is no working software yet, or software they would rather you not see.
  • A developer who cannot explain the architecture in plain terms, or who bristles at your questions, is a warning sign about the product, not just the person.
  • Fixes are practical: ask for a working demo every week or two, get a third-party code audit, and confirm you own the accounts and credentials.
Open verycreatives.com →
✍️ Essay
✓ Link checked Free Beginner

Why we picked it The single line "working software over comprehensive documentation" is the whole defense against a developer building the wrong thing, and this is where it comes from. It is short, canonical, and reframes the founder's job as insisting on seeing something that runs, early and often, rather than trusting a plan or a spec. Read it as the principle behind every "show me a demo" instinct.

Manifesto for Agile Software Development

From agilemanifesto.org by Kent Beck, Martin Fowler, and 15 co-authors

  • The core value, working software over comprehensive documentation, means your best signal is a running build you can see, not a status update or a document.
  • Responding to change over following a plan gives a non-technical founder permission to course-correct the moment a demo looks wrong.
  • It is a one-page foundational text from 2001 that still underpins how modern teams (and Lean Startup) argue for shipping early and learning fast.
Open agilemanifesto.org →

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