fonio.aiProduct Designer
Vienna · Full-time
€65K–€90K
Why join fonio.ai?
The prize is customer service for every small business phone line in German-speaking Europe, especially the ones that now go to voicemail. fonio.ai, a Vienna AI firm whose phone assistant is built for German-language calls and GDPR-compliant, is aiming straight at it. A $17M seed, larger than three in four peers, drew Sequoia Scout and The Twenty Minute VC, and now 83 roles are open, 27 added in 30 days.
JustBacked's take, based on fonio.ai's own site and its funding and hiring data.
About fonio
We grew from $1M to $10M ARR in under 12 months and now serve 10,000+ customers. fonio is Europe's market leader for AI phone agents for SMBs. Our AI answers every call automatically, but voice is just the beginning: we're building the AI operating system for small businesses.
We move fast, take ownership, give direct feedback, and avoid politics and unnecessary meetings. Join one of Europe's fastest-growing companies.
Your role
You shape how fonio feels to use for thousands of businesses. You own core areas of our product end-to-end: from talking to customers, to designing the flow, to shipping it with our engineers.
You're a hands-on designer with high craft and a lot of autonomy. You don't wait for perfect specs. You find the problem, design the solution and move fast.
What to expect
Own the design of core product areas end-to-end, in close collaboration with Product Engineering and our founders
Talk to customers regularly and turn insights into design decisions
Turn complex functionality into simple and easy to use experiences
Shape and scale our product design system
Prototype fast with AI tools (Cursor, v0, Claude and others) to get from idea to testable flow in hours, not weeks
Use analytics to measure what works, and iterate
Who we're looking for
Several years of experience as a product designer, ideally in a small, fast-moving product team (portfolio required)
Exceptional design craft: interaction detail, hierarchy, typography and motion
High autonomy: you take ownership without needing much structure
Experience with design systems and shipping features end-to-end
Product and analytics thinking: you don't design from your gut, you measure
AI-first mindset
Fluent English (any additional language is a plus, especially German (DACH is our most important market)
What we offer
Competitive salary: €65,000–€90,000
Equity - you're building this, so you should own a piece of it.
Food & drinks - lunch and dinner are on us
Relocation bonus (if you still need to move)
Equipment of your choice - whatever makes you happy.
Hiring process
15 min intro call
Case study
Skill interview with Moritz
Culture call with the founders