Senior Staff Research Scientist (AI)

Location: London, United Kingdom

Company

DeepL is an AI product and research company developing secure language AI solutions for translation, writing assistance, and real-time voice communication.

What you will do

• Lead hands-on research and development across ASR, machine translation, TTS, and speech-to-speech translation for real-time voice products.
• Design, train, and optimize large-scale multilingual ASR models for accuracy, robustness, and ultra-low-latency streaming.
• Improve cascaded translation pipelines, including segmentation, ASR-to-MT interfaces, streaming inference, and incremental decoding.
• Develop real-time TTS and end-to-end or LLM-based speech-to-speech translation systems.
• Own model delivery from prototyping and experimentation through evaluation, optimization, and production deployment.
• Collaborate with engineering teams, mentor researchers and engineers, and improve model reliability, monitoring, serving, and operational quality.

Requirements

• Deep expertise in speech, audio, or multilingual machine learning, especially ASR, MT, TTS, end-to-end speech translation, or large speech models.
• Hands-on experience training models, running experiments, debugging pipelines, and integrating machine learning systems into production.
• Strong understanding of real-time streaming constraints and low-latency model design.
• Experience shipping and maintaining machine learning models at scale, including deployment, monitoring, and serving.
• Strong coding and experimentation skills with Python, PyTorch or JAX, and audio processing libraries.
• Experience leading complex research efforts, communicating clearly across teams, and mentoring others.

Culture & Benefits

• Work with cross-functional Research, Engineering, and Product teams on real-time multilingual communication.
• Contribute to products used by businesses and individuals across global markets.
• Work in an environment emphasizing innovation, collaboration, authenticity, diversity, growth, and well-being.