Senior Founding Product Engineer

About the Role

Join a fast growing AI powered B2B SaaS startup as a founding product engineer, collaborating with a small team to ship end to end features for a German focused AI phone assistant used across Europe. You will own initiatives from idea to production and help scale the product and its adoption.

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 testing hypotheses through rapid experiments.
• Maintain close contact with customers, partners, and Sales to surface real pain points.
• Design and implement tracking to enable data driven decisions.
• Build software across the stack and drive architecture choices through release.
• Prioritize pragmatic solutions balancing immediate validation with long term scalability.
• Run experiments and lightweight prototypes before large scale commitments.
• Take ownership and move initiatives forward without waiting for sign offs.

What We're Looking For

• 3+ years of product engineering experience delivering features end to end.
• Full stack experience with Node.js, TypeScript, NestJS, and React.
• Experience integrating or working with large language models is a strong plus.
• German language proficiency at B2 level or above, with English for team and product communication.
• Hands on experience owning software architecture through production release.
• Comfort in a startup environment and a pragmatic, data driven mindset.
• Experience extracting and owning relevant metrics to iterate based on data.