Careers
Build the operating system for money-in.
A live product with real customers, and a hard deadline on our side: the EU's ViDA package is moving reporting towards real time across the bloc. We're a six-person team in Espoo looking for the people who'll build it with us. You'll ship, not spectate.
Why join now
Real ownership, a live product, an EU-wide clock.
Founding seat
Real ownership (equity / ESOP) and a domain you own end to end, with no layers between you and the problem.
Users from day one
Five businesses in Finland run on Fizzy today. Small enough that what you ship is on a real counter that week, and you hear about it from the person using it.
Precision matters
In tax and payments, a wrong number is a legal issue, not a bug. We build accordingly.
Currently hiring.
Senior Full-Stack Engineer (Founding Engineer)
Espoo / Finland · Full-timeOwn the technical backbone of the money-in platform: the sealed transaction ledger, Worldline payment integration, offline-first sync, structured tax export (SAF-T, e-invoicing / EN 16931), and government API integrations (Vero and the Nordic tax authorities).
You'll thrive if you
- ▪Have strong full-stack experience (TypeScript / PHP / PostgreSQL / MySQL)
- ▪Love integration-heavy backend work: APIs, structured data, third-party & government systems
- ▪Are self-directed and comfortable owning a domain in a small team
- ▪Care about precision: a wrong number is a legal issue
Bonus points
- ▪Payments / POS / regtech domain familiarity
- ▪AI/LLM integration (RAG, grounding, evaluation)
- ▪GDPR / financial-data security awareness
Don't see your role? Send a short note plus anything you've built to careers@fizzy.fi.