About InvisiblePuzzle

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

What I'm Doing

I'm Micael Coutinho, and I'm building B2B automation tools. The goal is simple: ship products that people actually need, validate fast, and kill what doesn't work.

Some tools will succeed. Some will fail. All will teach me something about building products people want.

Why Build in Public?

Because hiding until it's "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 (can't quit quietly)
  • Helping others learn from my mistakes

I share what's working, what's not, and what I'm 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 don't break when they matter most.

Now I'm applying that engineering mindset to B2B tools. Same principles - reliability, precision, attention to detail - but faster iteration and user feedback loops.

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.

These aren't massive platforms. They're the kind of tools you use once a week to save 2 hours of manual work. Simple to understand, quick to use, immediately valuable.

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. If you have a specific workflow that needs automation and off-the-shelf tools won't cut it, let's talk.

I'm 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.