Co-Founder / CFO (m/w/d) – Market, Finance & B2B Growth

Resonance Spaces connects realistic AI conversation simulations with direct, understandable feedback. People train difficult conversations protected, multilingual, and practice-oriented; organizations receive a scalable learning format for conversation, conflict, and leadership competence.

You have sold an explanatory product or service to organizations and can name concrete results. You combine business acumen with solid numbers, enjoy talking to customers, and quickly turn insights into decisions. B2B sales, proposal and pricing, financial planning, controlling, grant and financing logic, and building reliable customer relationships are particularly relevant. You take responsibility, remain action-oriented when not everything is set in stone, and work both independently and team-oriented. We are looking for a long-term full-time co-founder, not a consulting role. Fluent German and very good English are required; your formal degree is secondary. Previous startup experience is helpful but not a must.

Resonance Spaces develops AI-supported training environments where people can practice difficult conversations safely and realistically. They train feedback, conflicts, or controversial discussions with AI conversation partners and receive direct, understandable feedback. Schools, universities, and organizations thereby strengthen communication, conflict, and leadership competencies. Our platforms are geared towards structured, multilingual, and inclusive discussions and aim to enable new forms of democratic dialogue. We are a Berlin founding team: Antonia is responsible for content and partnerships, Martin for product and AI. A functioning first product version and reliable usage signals are available. Now we are building the first paying B2B entry and a solid business model.

Berlin, Cologne, Munich – hybrid collaboration with regular on-site presence; remote components are possible.

Become our third founder and build market, finance, and B2B sales – from first paying pilot customers through pricing and financial planning to financing.

You take over the area that makes the difference right now: Market and Finance. With real decision-making space on an equal footing, you win your first paying customer and create the economic foundation for growth. Your focus areas: • Win customers: You speak with the people who buy training, understand their needs, and develop paid pilots and long-term customer relationships from that. • Sharpen the business model: You develop clear offers and prices, lead sales conversations, and build a solid financial plan. • Financing and building the company: You prepare financing steps and shape structures, priorities, and strategy as part of the founding team. You join at the right time: Product and initial practical experience are available, but the crucial economic decisions are still open. Antonia is responsible for content and partnerships, Martin for product and AI, you for market and finance. Together we strengthen the handling of conflicts and different perspectives – directly, learning-oriented, and without status games.

You are joining as a genuine third co-founder – with your own decision-making space, equity, and long-term perspective. You shape the market, pricing, financing, and company strategy from the outset. Product and initial practical experience are available; the key economic decisions are still open. Antonia is responsible for content and partnerships, Martin for product and AI, you for market and finance. We work directly, learning-oriented, and without status games. A twelve-month EXIST grant is targeted from November 2026. Initially, 1,000–3,000 EUR per month are planned depending on status, possibly plus child benefit. We cannot promise a guaranteed salary in the early phase; a later salary depends on revenue or financing. In addition, there is flexible hybrid collaboration in Berlin and the chance to build a socially relevant product economically.