Senior / Staff Product Engineer

Senior or Staff Product Engineer to help build the next generation of Passionfroot. You'll work across the full stack on both the core platform and Zest, the AI Campaign Manager for creator marketing—designing workflows, making collaboration data feel instant, or turning models, search, and product context into a reliable AI experience customers can trust.

What you'll do

• Own meaningful product areas from problem definition through architecture, implementation, launch, and iteration.
• Build customer-facing features across the marketplace, campaign management, collaboration, payments, analytics, and creator workflows.
• Turn foundation models into structured, reliable product experiences—not just impressive prototypes.
• Work on intelligent workflows involving agents, tools, retrieval, search, recommendations, and generated interfaces.
• Develop the evaluations, observability, and feedback loops needed to understand whether AI features are genuinely useful.
• Talk directly with customers and translate ambiguous needs into simple product decisions.
• Make pragmatic architectural choices that balance speed, quality, maintainability, and performance.
• At Staff level, provide technical direction across projects, raise the engineering bar, and help other engineers make better decisions.

What you'll need

• Significant experience building and shipping high-quality, customer-facing software. 5+ years is a useful guide, but scope and quality of work matter more than the number.
• Strong TypeScript and React fundamentals, with experience working across the full stack.
• Track record of independently driving complex features or products from an ambiguous starting point to measurable customer impact.
• Strong product and technical judgment about what should be built, how it should feel, and whether it solves the problem.
• Experience building with LLMs or other applied AI systems in production.
• Understanding of the challenges behind reliable AI products: evaluation, context, retrieval, model behavior, latency, cost, observability, and failure modes.
• Clear, proactive communication and ability to collaborate effectively in a remote environment.
• Care for software craftsmanship without losing sight of momentum and customer outcomes.

What they offer

• Competitive salary and equity in a Series A company.
• Hybrid work with option to work in Berlin office.
• Latest Apple hardware and tools needed for the role.
• 25 days paid vacation plus local public holidays.
• Regular team events and off-sites.