Senior / Staff Product Engineer

About the role

Passionfroot is building the infrastructure for creator‑led growth and is looking for a Senior or Staff Product Engineer to shape the next generation of its platform and AI Campaign Manager, Zest. You will work across the full stack, turning AI models into reliable product experiences while owning end‑to‑end feature delivery.

Key responsibilities

• Own product areas from problem definition through architecture, implementation, launch and iteration.
• Build customer‑facing features for marketplace, campaign management, collaboration, payments, analytics and creator workflows.
• Integrate foundation models into structured, reliable product experiences and intelligent workflows.
• Develop evaluation, observability and feedback loops for AI features.
• Provide technical direction at staff level, raise engineering standards and mentor teammates.

Required profile

• 5+ years of experience building and shipping high‑quality, customer‑facing software.
• Strong judgment on product and technical decisions, able to drive ambiguous projects to measurable impact.
• Experience delivering AI‑powered features in production and understanding challenges such as latency, cost and observability.
• Proactive communicator who thrives in a remote, hybrid environment.

Required skills

• TypeScript
• React
• Remix
• PostgreSQL
• Prisma
• Zero sync (real‑time sync)
• LLMs / foundation models
• Typesense
• Laminar
• AI SDK

What we offer

• Competitive salary and equity in a Series A company.
• Hybrid remote‑first work with a Berlin office.
• Latest Apple hardware and tools for optimal productivity.
• 25 days paid vacation plus public holidays.
• Regular team events and off‑sites.