Senior Product Engineer

ABOUT THE ROLE Join a small product engineering team building AI voice and agent systems for customer-facing workflows. You will own features end to end, work directly on customer problems, and help shape how these systems handle complex interactions reliably. WHAT YOU'LL DO - Build tools that help configure AI agents, troubleshoot issues, connect external systems, and answer questions about customer workflows. - Develop and optimize voice agents for speed, reliability, and high-quality interactions. - Extend agent capabilities across calls, messaging, and email, with shared memory and state. - Build memory systems that help agents reason across complete customer journeys. - Improve observability and tracing so issues in agent interactions are easy to understand. - Help agents select the most appropriate communication channel for each interaction. WHAT WE'RE LOOKING FOR - At least 3 years of experience building and owning production product features across frontend and backend, including distributed systems. - Production experience with Python, FastAPI, or TypeScript for backend systems, and experience building React frontends. - Experience with real-time audio or voice infrastructure, AI agents or LLM-based systems, and asynchronous or event-driven systems with complex state. - Experience with PostgreSQL, Redis or similar data stores, and AWS, GCP, or Azure. - Familiarity with workflow orchestration, scheduling, communication integrations, and observability tools is valuable. - Strong software fundamentals, product sense, and a bias toward action and business impact. - Relevant technologies include TypeScript, React, Vite, TanStack, Node.js, Python, FastAPI, PostgreSQL, Redis, Temporal, and AWS. COMPENSATION & BENEFITS €85,000 to €160,000 annually, plus equity. Visa sponsorship is available. LOCATION On-site in Berlin, Germany.