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DevelopmentDec 20, 20255 min read

How One Small Mistake Cost Me 6 Months of Development — A Hard Truth Every Developer Must Read

KA

Kad

Author

A brutally honest story about a single overlooked decision that destroyed six months of work. This is not a motivational post — it’s a survival guide for developers, founders, and builders.

I didn’t lose six months because of a bad idea.

I lost it because of a decision I didn’t slow down enough to question.

At the time, everything felt right.

The requirements were clear.

The stack made sense.

Progress was steady.

There was no moment where things “went wrong.” That’s the dangerous part.

Where It Actually Started

On the first week, I made a choice about structure.

Nothing dramatic. No red flags.

I decided how users would move through the product.

Not based on data.

Not based on observation.

Based on what felt logical to me.

That decision shaped everything that followed:

  • database design

  • API contracts

  • permissions

  • frontend flows

Once those are in place, changing them is not iteration — it’s demolition.

The Slow Realization

The first users didn’t complain much.

They just didn’t behave the way I expected.

They skipped steps.

They misunderstood screens I thought were obvious.

They used features in the wrong order.

To “fix” this, I added small patches:

  • helper text

  • validations

  • extra conditionals

Each patch made the system heavier and harder to reason about.

That’s when I understood the truth:

I wasn’t fixing bugs.

I was fighting my original assumption.

The Cost of Not Rebuilding Early

By the time it was obvious, rewriting meant:

  • breaking existing data

  • reworking permissions

  • rethinking flows from scratch

So I postponed it.

That delay cost me more than rebuilding ever would have.

Technical debt isn’t always about messy code.

Sometimes it’s about a wrong idea that everything else depends on.

What I Do Differently Now

Before committing to architecture, I now do one simple thing:

I watch people use the product without explaining anything.

If something confuses them, I assume the design is wrong — not the user.

I no longer ask, “Does this make sense?”

I ask, “What will someone do when they don’t read anything?”

That single change has saved me months of rework.

Final Thought

Most failures don’t come from big mistakes.

They come from small decisions made too quickly.

Slow down at the beginning.

It’s the cheapest time you’ll ever get.

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