Wednesday Code Autopsy · #18

I Ship a Certified MSIX Package. In an Interview I Could Not Define a Package

I build with them constantly and I blanked on defining one.

By Marcin Firmuga·2026-07-29·4 min read·Wednesday Code Autopsy #18

I have a certified MSIX package sitting on the Microsoft Store. On Tuesday, in an interview, I was asked what a package is. I described the installer.

I never once mentioned the answer I use every single week: pip install. npm install.

On Monday I wrote that I am losing my home in a month or two and staying in Radom to fund my own way out. I expected it to sink like most of my posts do.

Instead, people have never surprised me the way they do now. People I have never met started spending their own evening on me. Three people passed my CV to one company. Someone abroad referred me. Someone else pushed my name to an HR team and had me on a call the same day.

That was your private time. Your own reputation, spent on a stranger from Radom. It made me uncomfortable in a way I did not expect, and I have not stopped thinking about it since. So, genuinely: thank you.

Now the autopsy

The interview was in English, technical, and fast. Stack. Azure. Fundamentals. I got some. I missed some. And on one I answered with complete confidence and was still wrong.

Asked what a package is, I described the .msix I ship to the Store and skipped the library I install every week without thinking about it. I build with them constantly and I blanked on defining one. A hole between doing and explaining. Interviews test explaining.

I agree with them.

So that night I did the only thing I know how to do with a sting. I opened a file and wrote the fundamentals down again. Modules. Azure. Package: a library, not the installer. Plain sentences I can actually say out loud while my heart is going.

There may be a chance. If it happens, I walk in prepared. If it does not, the notes stay and the next one goes better.

It is not a wasted interview. It is a rep. After a year of building alone, I do not waste a rep.

To everyone who commented, shared, or quietly sent my CV somewhere: I promise I will squeeze every single thing out of what you gave me.

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This is the project behind the post. PC Workman is a free, open-source Windows system monitor with an offline AI assistant - everything described here is real, shipped code. Download it or read the source.
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Marcin Firmuga

Solo developer · HCK_Labs · building PC Workman in public

Every edition is written from that week's real commits. Newest posts premiere on LinkedIn - the archive lives here. More about me: my story.