Voice - Research Scientist

DeepL Cologne, North Rhine-Westphalia, Germany

DeepL is a global communications platform powered by Language AI. Since 2017, we’ve been on a mission to break down language barriers. Our human-sounding translations and intelligent writing suggestions are designed with enterprise security in mind. Today, they enable over 100,000 businesses to transform communications, reach new markets, and improve productivity. And, empower millions of individuals worldwide to make sense of the world and express their ideas.

The Voice team is at the heart of DeepL’s next chapter. We are a dedicated group of experts across Research, Engineering, Product, and Design, on a mission to solve the art of the possible for real-time voice translation. After launching our first breakthrough features in late 2024, we are scaling rapidly, targeting major meeting platforms, real-time communication channels, and a powerful Public API.

We’re looking for a seasoned Senior Research Scientist to help us tackle foundational challenges in this competitive and dynamic field. This isn’t just an academic exercise; it’s a chance to see your research deployed into products loved by millions worldwide. You will leverage our cutting‑edge resources, including massive proprietary datasets and one of Europe’s most powerful supercomputers, to build the next generation of speech translation systems.

• Build and deploy custom, state-of-the-art AI models for transcription, voice translation, text-to-speech generation, and other challenging audio and text modalities.
• Train state-of-the-art neural networks at scale on DeepL’s dedicated GPU clusters, pushing the boundaries of model performance and efficiency.
• Aggressively optimize our end‑to‑end voice AI technology for demanding, low‑latency production environments where every millisecond counts.
• Work collaboratively within a large, world‑class tech organization, integrating your research with a strong support structure of ML Platform, HPC, and Dev Ops teams to ship your work to millions.
• Lead research initiatives that advance our core understanding of neural networks and their mathematical optimization, directly impacting our product's quality and capabilities.
• Participation in our on‑call rotation:
  You’ll ensure the reliability and availability of our services by being available to join the team's shared on‑call rotation as needed.

• You have a solid mathematical background and enjoy solving challenging problems, evidenced by a PhD or equivalent industry experience in mathematics, physics, computer science, or a related field.
• Proven experience building and shipping large‑scale deep learning models to production environments.
• Deep practical experience in Python and at least one modern machine learning framework such as PyTorch, Tensor Flow, or JAX.
• A track record of leading self‑directed research projects that go well beyond academic exercises and deliver tangible results.
• High proficiency in English; knowledge of German or other languages is a plus.

We are an equal opportunity employer. You are welcome at DeepL for who you are—we appreciate authenticity here. Our product is for everyone, and so is our workplace. The more voices we have represented and amplified in our business, the more we will all succeed, contribute, and think forward! So bring us your personal experience, your perspectives, and your background. It’s in our diversity that we will find the power to break down language barriers in the world.

Associate

Full‑time

Other

Software Development

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