Senior Product Engineer

ABOUT THE ROLE Join a small product engineering team building AI voice and customer communication software. You will own features end-to-end across applied AI, agent configuration, integrations, and the systems behind them, helping deliver reliable solutions to customer problems. WHAT YOU'LL DO - Build product features that help users configure AI agents, troubleshoot issues, connect external systems, and get useful answers from their data. - Develop and improve 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 support reasoning across customer interactions and workflows. - Improve observability and tracing so issues in agent interactions are easier to understand and resolve. - Help agents select the right communication channel for each interaction. WHAT WE'RE LOOKING FOR - Production experience building and owning distributed systems and product features across frontend and backend. - Strong software engineering fundamentals, product judgment, and the ability to learn unfamiliar domains quickly. - Production backend experience with Python, FastAPI, or TypeScript, and experience building React frontends. - Experience with real-time audio or voice infrastructure, AI agents or LLMs, and asynchronous or event-driven systems with complex state. - Experience with PostgreSQL, Redis, or similar data stores, and cloud infrastructure such as AWS, GCP, or Azure. - Familiarity with workflow orchestration, job scheduling, communication integrations, and observability tools is useful. - Relevant tools include TypeScript, React, Vite, TanStack, Node.js, Python, FastAPI, PostgreSQL, Redis, Temporal, and AWS. COMPENSATION & BENEFITS Compensation is €85,000 to €160,000 annually, plus equity. Visa sponsorship is available. LOCATION This is an on-site role in Berlin, Germany. Relocation support is available.