Senior AI Engineer – Voice

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🕒 May 29

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JUPUS

WebsiteLinkedInAll Job Openings

51 - 200 employees

🤖 Artificial Intelligence

☁️ SaaS

🤝 B2B

💰 $7.3M Seed Round - Jupus on 2025-05

Artificial Intelligence • SaaS • B2B

JUPUS is a German SaaS company that provides an AI-powered legal secretary platform for law firms. Its product centralizes client intake across web chat, phone, and email, automates digital questionnaires, extracts and generates legal documents (e. g. , powers of attorney, mandate agreements), offers an AI answering machine and chatbot, online appointment booking, and integrates with law firm software. Designed to be GDPR and professional-law compliant, JUPUS aims to reduce administrative effort, increase qualified mandates, and free up billable time for legal teams.

📋 Description

• You’ll help define how voice AI is built and operated in a fast-moving product environment. • As a core Senior AI Voice Engineer, you’ll turn modern voice and generative AI technologies into production-ready systems that deliver real value to users. • Your primary goal will be to maintain, improve, and expand our phonebot platform. • Expect strong technical ownership, fast iteration, and a clear focus on building reliable voice systems that operate effectively in real-world telephony environments. • Architect and implement production-ready generative voice AI solutions within our product suite. • Develop voice-based AI systems, integrating speech technologies such as ASR/STT and TTS into conversational workflows. • Design and optimize real-time voice agent workflows, balancing latency, reliability, and conversational quality. • Architect and implement production-ready generative AI and LLM-based solutions to power voice experiences end-to-end. • Implement evaluation, testing, and observability for AI systems to ensure reliability and continuous improvement. • Establish best practices for AI development, testing, and deployment across products. • Handle AI development hands-on as a core technical contributor within a small, fast-moving team where engineers own problems end-to-end and ship quickly. • Work closely with product, design, and engineering teams to integrate AI capabilities into real product workflows. • Partner with stakeholders to define and improve user experiences across voice, telephony, and AI-driven interactions. • Translate complex AI concepts into practical product features and communicate them clearly to both technical and non-technical stakeholders.

🎯 Requirements

• 5+ years of software engineering experience • 1–2+ years of hands-on experience building and operating production Voice AI systems • Proven experience building and shipping production phone agents handling real users and real phone calls • Hands-on experience with at least one major voice-agent framework or provider such as LiveKit Agents, Vapi, Pipecat, Retell, Daily Bots, Bland, OpenAI Realtime, Twilio, Telnyx, Deepgram, Soniox, ElevenLabs, or Cartesia • Strong understanding of the complete voice pipeline, including STT, LLM orchestration, TTS, turn-taking, interruption handling, and latency optimization • Strong understanding of telephony concepts including PSTN, SIP, and WebRTC • Experience building LLM-powered products end-to-end, including prompt engineering, RAG, tool/function calling, model selection, and evaluation • Experience with LLM observability and evaluation tools and designing evaluation pipelines for AI systems • Strong programming skills in Python and solid software engineering practices • Experience implementing AI systems in real production environments, not purely research or academic settings • Nice to Have: Experience operating high-volume outbound calling systems, including concurrency management, retries, and compliance considerations • Experience deploying OpenAI Realtime API or Gemini Live into production environments • Experience with voice evaluation and observability platforms or custom evaluation frameworks • Fluency or working proficiency in European languages such as German, French, Spanish, or Italian • Experience contributing to or participating in voice AI communities and open-source projects

🏖️ Benefits

• 🚀 Foundational Impact – Help build and scale the core AI capabilities of JUPUS from the ground up • 🔒 Technical Ownership – Work directly on the systems powering AI features across multiple products • 🌱 Growth Environment – Build production AI systems at the cutting edge of generative AI and agentic workflows • 💼 Leadership Visibility – Flat hierarchy with direct access to the Head of Engineering and CTO, reporting to the AI Lead • 🏡 Fully Remote – Enjoy the flexibility of working from anywhere • 💻 Top Equipment – State-of-the-art MacBook plus all the accessories you need • 🏋️ Wellbeing Perks – Urban Sports Club membership to support your healthy lifestyle