Senior AI Engineer | Voice at Jupus

We’re seeking a driven Senior AI Voice Engineer to join one of the fastest-growing legal tech companies in Europe as we expand our core AI team delivering ‘Marie’, our AI phone assistant. This role focuses on production voice AI systems operating over real telephony infrastructure : building, maintaining, and scaling phone agents that handle real customer conversations at production volume. You'll own the complete voice stack, from telephony and speech systems through to LLM orchestration, tooling, evaluation, and observability. Reporting to the AI Lead , you’ll work hands-on from architecture to implementation, collaborating with the Head of Engineering and product teams to ship reliable AI functionality while improving our voice infrastructure, evaluation workflows, and AI platform capabilities. For an engineer who has personally shipped production phone agents and end-to-end LLM-powered products , this is an opportunity to take technical ownership of Marie, ship quickly, and shape h