Senior Product Designer (m/f/d) - AI Revenue Manager (Founding Designer)

happyhotel is building the AI Revenue Manager: a new product category that replaces dashboard-heavy SaaS and feels to hoteliers like having their own on-demand revenue expert - accessible via WhatsApp, Telegram, and a focused web UI. Not an "AI feature taped onto an existing product," but a product built from the ground up around a conversational agent. For this mission, we're looking for you as a founding designer—working directly alongside Marius (Co-founder & CTPO) and Sebastian (Co-founder).

You are the first designer in a newly formed product team and define how an AI agent must feel in the hotel daily routine so that a general manager will trust it with their pricing. You answer questions for which there are currently no design patterns: How does an AI agent hand off smoothly to a human expert when uncertain? How do you make AI decisions transparent and comprehensible without overwhelming users with data? Where does the chat UI end, and where does the web UI begin?

You'll be working before the first line of production code is written - in prototypes, with real hoteliers as beta design partners, in daily exchanges with the founders.

• Define the interaction paradigm of the product: What does an AI Revenue Manager feel like? What happens in chat, what in the web UI, what proactively, what reactively?

• Design the AI-to-human escalation, one of the central areas in our hybrid model, where internal RM experts step in when AI isn't confident enough.

• Make AI decisions visible and trustworthy: every recommendation with justification, every result traceable , the agent’s "long-term memory" as a premium design object.

• Quickly build testable prototypes using AI-assisted tools (Figma Make, v0, Lovable, Cursor, Claude Code) and establish patterns so that PM and Engineering can also independently build consistent prototypes - you’re an enabler, not a bottleneck.

• Run a continuous research loop together with the PM with ~10 beta design partners and our internal RM team.

• Develop the visual language of the new product: modern, accessible, trustworthy, consistently across chat, web, and notifications. As close to code as possible.

• 3+ years product design in digital products, ideally SaaS.

• Experience in 0-to-1 or founding context—you can make decisions under ambiguity and don't need a detailed brief.

• Genuine interest in AI products, not just "AI buzzword on your resume," but keen to co-invent the UX patterns for agentic products.

• You prototype close to code and actively use AI-assisted tools to shorten feedback loops from weeks to days.

• Strong user research practice: conducting interviews with non-technical, time-pressed users and deriving decisions from them.

• You enjoy working in tight loops with founders and engineeringshort messages, quick calls, decisions on the same day, revert the next if needed.

• You're willing to work regularly with the team onsite in Offenburg or remotely with close touchpoints.

• You communicate fluently in German and English (both at a professional level).

• Founding-level ownership: You shape how a new product category feels - not just another feature.

• A problem worth solving: Independent hoteliers, for the first time, get the power of a dedicated revenue manager. Real business impact, real people on the other side.

• Direct line to the founders: You work daily with Marius (CTPO) and Sebastian - short lines, real decisions, no design hierarchy in between.

• A technically ambitious product: Conversational AI in a data-rich, highly sensitive domain - here, you'll help form patterns that don’t exist yet.

• Real time pressure with real partners: Committed beta design partners are waiting for prototypes. By the end of 2026, the first customers will use the live product.

• Flexible working hours, remote work, personal training budget, Hansefit, bike leasing, workation, and the usual benefits, but honestly, if you’re coming for the benefits.