About InvisiblePuzzle

Building micro-SaaS tools that solve real problems for B2B teams and B2C consumers.

What I am Doing

I am Micael Coutinho, and I am building B2B/B2C tools. The goal is simple. I ship products that people actually need, validate fast, and kill what does not work.

Some tools will succeed. Some will fail. But all of them will teach me something about building products people want.

Why Build in Public?

Because hiding until it is "perfect" is how products die. Building in public means:

  • Shipping faster (no time for overthinking)
  • Getting real feedback early (not after months of work)
  • Staying accountable (cannot quit quietly)
  • Helping others learn from my mistakes

I share what is working, what is not, and what I am learning. You can follow along through my blog posts or on Indie Hackers.

My Background

Before this, I spent years as an embedded software engineer in automotive. That means writing code for safety-critical systems where bugs can literally kill people. It taught me to build things that work reliably, handle edge cases, and do not break when they matter most. Because your code affects real people.

In automotive, you do not ship broken code and fix it later. You do not ignore edge cases. You do not assume things will work. You verify them. That environment drilled a specific mindset into me, where every line matters, testing is not optional, and reliability beats speed.

Now I am applying that engineering mindset to B2B/B2C tools. The same principles apply. Reliability, precision, attention to detail, but faster iteration and user feedback loops. The stakes are different, but the approach is the same. You build things that actually work.

The Tools I Build

My focus is on micro-SaaS tools—small, focused utilities that solve one problem really well. Think calculators, analyzers, comparators, and simple automation tools. No feature bloat. No enterprise complexity. Just software that does one thing well and gets out of your way.

These are not massive platforms. They are the kind of tools you use once a week to save 2 hours of manual work. Simple to understand, quick to use, but immediately valuable. The best tools are the ones you barely notice because they just work, because they fit into user workflows instead of working againts them.

Each tool follows the same pattern. I identify a specific pain point, build a focused solution, charge money, iterate based on real feedback. Some will succeed. Most will fail. But all of them teach me something about what people actually need versus what they say they want.

Check out the tools page to see what I'm working on.

Need Something Custom?

While my main focus is building productized tools, I occasionally take on custom automation projects for B2B companies, or even B2C apps, if they make sense. If you have a specific workflow that needs automation and off-the-shelf tools will not cut it, reach out.

I am selective about custom work because it takes time away from product development, but the right projects help fund the product sprint and expose me to real problems worth solving.

Follow the Journey

Want to see how this plays out?

InvisiblePuzzle - Building automation tools that just work.