Skip to main content
Back to all jobs

Voice AI Engineer (all genders)

Bremen, Berlin, Mainz, Mannheim, München
Full or part-time
Permanent employee

Your new role

Build voices that power real conversations. At botario, you'll develop the text-to-speech and speech-to-text systems behind our AI Voice Agents—from the underlying models to low-latency, production-ready deployment. You'll help create voice experiences that sound natural, respond in real time, and perform reliably even in challenging real-world conditions.

The work you‘ll do

  • Develop and continuously improve our proprietary text-to-speech (TTS) and speech-to-text (STT) systems, from model development to real-time streaming inference.
  • Optimize latency across the entire voice pipeline, including time-to-first-audio, streaming synthesis, and efficient model serving—because every millisecond matters.
  • Improve voice quality and naturalness by working on prosody, pronunciation, and robustness under real-world audio conditions.
  • Evaluate the latest open-source speech models and integrate the most promising approaches into our technology stack.
  • Measure and validate your work through latency profiling, quality benchmarks, and listening tests.
  • Collaborate closely with engineers and cross-functional teams in an agile environment.

The qualifications you need

  • Hands-on experience with speech technologies such as text-to-speech (TTS), speech-to-text (STT), real-time audio processing, or speech model inference.
  • Familiarity with concepts such as audio codecs and speech tokenizers—or a strong machine learning and PyTorch background with the motivation to specialize in speech AI.
  • Strong Python programming skills and the curiosity to explore unfamiliar technical challenges.
  • A solid understanding of why low latency is critical for natural conversations and experience optimizing real-time systems.
  • Ideally, experience deploying speech AI models in commercial production environments.
  • A collaborative mindset and experience working in agile teams.

What we can offer you

  • The opportunity to shape the future of AI-powered communication in an innovative company with a clear vision.
  • Flat hierarchies, short decision-making paths, and the freedom to contribute ideas and work with the latest technologies.
  • A modern office at Bremen's Europahafen with waterfront views.
  • Company fitness, BusinessBike, and access to our company boat.
  • Funding for the e-learning courses of your choice to support your professional development.
  • Regular knowledge sharing through internal meetups and participation in AI and technology events.
  • Exciting international customers across a wide range of industries.
  • A competitive salary and employee participation program.
  • 30 days of annual leave and flexible part-time options.
  • High-end hardware, height-adjustable desks, and multi-monitor workstations.
  • A family-friendly culture that supports work-life integration and has been officially recognized as a family-friendly employer.

About us

We don't just look at the bare figures, because we are particularly looking for people who are characterised by talent and motivation. So if you believe that this position is just right for you and that we can benefit from each other, but you do not (yet) fulfil all the criteria, we would still be delighted to receive your application.
 
Note: 
botario GmbH is a spin-off of JUST ADD AI GmbH and specialises in the development of intelligent chatbots (Conversational AI). botario was acquired by NFON AG on 1 August 2024. The chatbot management platform developed by botario enables the simple and effective creation, management and optimisation of chatbots. In addition to live chat, the chatbots created also offer a video chat function and can also be configured as phonebots.