$ whoami
Hafiz Muhammad Sharoz Khalid
$ cat about.txt
I build small, useful tools and give them away. Use them free in the browser, or take the code and run them yourself.
$ ls ~/tools
invoice e-rechnung e-invoice-deadline rate-calculator fintrack content-studio skew-map habit-tracker
$ ls -l ~/tools
Free to use. Each one came out of real work. Hosted tools run in your browser; the others you can run on your own server.
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live
open
invoice
Correct invoices for Germany and the EU, with the right VAT note and XRechnung export.
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live
open
e-rechnung
Turns an XRechnung or ZUGFeRD file into a readable invoice and checks it in plain language.
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live
open
e-invoice-deadline
Four questions give your German e-invoice deadlines, a to-do list and a calendar reminder.
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live
open
rate-calculator
Your minimum hourly rate from the net income you want, with 2026 tax, health insurance and pension.
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self-host
open
fintrack
Accounts, transactions, budgets and recurring payments on your own server.
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self-host
open
content-studio
Brief in, script, caption, voice-over, key visual and video out. Bring your own AI keys.
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demo
open
skew-map
A daily put/call skew board with one plain sentence per name. Educational.
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live
open
habit-tracker
Tick habits in one tap, see streaks and review your week. Or use the yearly spreadsheet.
$ ls ~/guides
Practical notes for freelancers and expats in Germany.
- E-invoicing in Germany, explained in EnglishGermany is replacing PDF and paper invoices between businesses with structured e-invoices. If you freelance or run a small business here, the rules …
- How to write an invoice in Germany, in EnglishGerman invoices have a fixed list of required details, and the tax office takes them seriously. Miss one and your client may not be able to deduct …
$ cat ~/about.md
> I don't wait for opportunities. I create them.
I'm Hafiz. I co-founded Brandilyst in Germany and Sourcechain Solutions in Portugal, and I build Einfach Fahrschule, software for driving schools.
Most of what I build starts as something one of those businesses needs. When it is useful beyond that, it ends up here, with a short guide on the topic behind it.
$ mail hafiz
An idea, feedback on a tool, or work you want built. I read everything.