Voice AI Engineer (all genders)

About the 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. 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.
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.
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.