Senior Research Scientist | Voice

DeepL; City Of London; On-site; GBP 80,000 - 100,000; Full time

Job summary

A leading Language AI company in the City Of London seeks a Senior Research Scientist to innovate in real-time voice translation. Ideal applicants will have strong experience with deep learning models and Python, combined with excellent problem-solving skills. The position offers a unique opportunity to influence products used by millions, working within a world-class tech organization. Competitive salary and benefits are provided.

Qualifications

• Strong practical background and creative mindset.
• Proven experience in large-scale deep learning models.
• High proficiency in English; German knowledge is a plus.

Responsibilities

• Build and deploy custom AI models for transcription and voice translation.
• Train neural networks at scale on dedicated GPU clusters.
• Optimize voice AI technology for low-latency production environments.

Skills

Building large-scale deep learning models

Python

Machine learning frameworks (PyTorch, TensorFlow, JAX)

Mathematical optimization

Education

PhD or equivalent in mathematics, physics, computer science

Job description

Meet DeepL

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.

Our goal is to become the global leader in Language AI, building products that drive better communication, foster connections, and make a real-life impact. To achieve this, we need talented individuals like you to join our exciting journey. If you're ready to work with a dynamic team and build your career in the fast-moving AI space, DeepL is your next destination.

What sets us apart

What sets us apart is our blend of modern technology, competitive benefits, and an open, welcoming work culture that enables our people to thrive. When we share what it's like to work at DeepL, the reactions are overwhelmingly positive. This may be because of our products that have helped countless people worldwide or our shared mission to improve communication for individuals and businesses, bringing cultures closer together. What we know for sure is this: being part of DeepL means joining a team dedicated to innovation and employee well-being. Discover what our teams have to say about life at DeepL on LinkedIn, Instagram and our Blog.

About DeepL

DeepL is a global communications platform powered by Language AI, dedicated to breaking down language barriers since 2017. Our human-sounding translations and intelligent writing suggestions are designed with enterprise security in mind, enabling over 100,000 businesses to transform communications, reach new markets, and improve productivity. We also empower millions of individuals worldwide to make sense of the world and express their ideas.

Our goal is to become the global leader in Language AI by building products that drive better communication, foster connections, and make a meaningful impact. To achieve this, we need talented individuals like you to join our exciting journey. If you're ready to work with a dynamic team and build your career in the fast-moving AI space, DeepL is your next destination.

The Opportunity: Define the Future of Real-Time Voice Communication

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.

Your Challenge & Responsibilities

• As a senior member of the team, you will move beyond incremental improvements and drive foundational innovation. You will:
• 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 DevOps 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.

Qualities We Look For

• We are seeking a researcher with a strong practical background, a creative mindset, and a passion for solving hard problems with real‑world impact.
• 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, TensorFlow, 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.