01
Invoice first
The first useful moment should be a real invoice, not a setup wizard.
About Quidbill
Built by a freelancer, for freelancers.
Quidbill is a small, focused invoicing product shaped by the frustration of using heavyweight accounting software for simple freelance billing.
Founder
Petru Arakiss
Focus
Freelance invoicing
Timezone
CET
Founder note
I wrote my first line of code at 9, started freelancing at 16, and entered AI in 2015 with TensorFlow. Today I lead AI Engineering at Atlax 360, building enterprise AI systems for fintech.
My career has taken me through BBVA, Santander, Bankinter, El Corte Ingles, and Decathlon, leading teams of 20+ engineers and architecting systems that handle millions of users. I have seen enterprise software at its best and worst.
Quidbill exists because invoicing should not require an accounting degree. After 19 years of building complex systems, I wanted to create something radically simple: professional invoices in 30 seconds.
I built Quidbill for developers, designers, and freelancers who value their time. The best software is the one that gets out of your way.
I built Quidbill because I was tired of spending more time on invoicing than on actual work.
Petru Arakiss
Product principles
The product stays useful by staying narrow.
02
Keep it narrow
Quidbill is for sending invoices, tracking status, and following up. Not running a whole finance department.
03
Earn trust
Three free invoices, exportable data, and direct founder support keep the promise measurable.
Timeline
From complex systems to simple billing.
2006
First code
Started programming as a kid and never really stopped.
2015
AI and fintech
Moved into machine learning and large-scale financial systems.
2018
Enterprise systems
Led engineering teams building software for major European companies.
2026
Quidbill
Started turning a recurring freelance pain into a focused invoicing product.
Start small