Join fonio.ai as a Founding Product Engineer to take end-to-end ownership of product features—from idea and prototype to production—helping scale a German-focused AI phone assistant used by customers across Europe. You’ll work on the Engineering team with strong product and customer focus, validating ideas quickly and shipping pragmatic software that delivers measurable value.
What you'll do • Own features end-to-end from hypothesis to production for products used by thousands of companies in Europe. • Lead product discovery by developing and testing hypotheses through rapid experiments. • Maintain close, recurring contact with customers, partners, and Sales to surface real pain points. • Design and implement tracking to gather the metrics needed for data-driven decisions. • Build software across the stack, driving architecture choices and implementation through release. • Prioritize pragmatic solutions that balance immediate validation with long-term scalability. • Drive experiments and lightweight prototypes before investing in large-scale builds. • Take radical ownership of initiatives and move them forward without waiting for sign-offs. What fonio.ai is looking for • Full-time, remote-first engineer working with overlap in CET and access to optional Vienna office. • Role in the Engineering department as a Product Engineer with significant ownership
responsibilities. • Strong experience with Node.js, TypeScript, NestJS, and React. • Experience integrating or working with large language models is a strong advantage. • Deep product mindset with responsibility beyond coding and focus on customer value. • Native-level German proficiency to support a German-language AI phone assistant. • Comfortable extracting and owning relevant metrics to argue and iterate based on data. • Pragmatic, experiment-driven approach to validating and shipping features. • Competitive
compensation (€80K–€120K) and equity as part of a high-growth environment.
Fonio.ai ist ein österreichisches Start-up, das eine Telefon-KI entwickelt hat, die wie ein Mensch klingt und Anrufe vollständig eigenständig übernehmen kann. Die Lösung wird täglich von über 6.000 Unternehmen genutzt, und das Wachstum verdoppelt sich derzeit jeden Monat. Die Infrastruktur wird bei Hetzner in Nürnberg gehostet, wodurch Fonio.ai eine der wenigen DSGVO-konformen Lösungen für KI-Telefonassistenten in der EU ist. Die Services basieren auf LLMs von Drittanbietern, insbesondere OpenAI; OpenAI wird in Europa über Microsoft Azure gehostet, um DSGVO- und EU AI Act-Konformität sicherzustellen. Das Unternehmen speichert ausschließlich notwendige Daten und kann auf Wunsch alle Daten in Echtzeit löschen; es zählt über 6.500 Kunden, und Kundenbewertungen finden sich bei Trustpilot, Google & OMR.
Salary
$80,000 - $120,000
Location
Remote
Total raised
$3.5M
Last stage
Seed
Investors
Daniel Keinrath
Co-founder
Matthias Gruber
Co-founder
No applications, no recruiter spam. Just the intro.
A few questions to make sure this role is the right shape for you. Two minutes.
I write the intro, send it to the founder, and handle the back-and-forth.
If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.