Software Engineer | Voice | Full-Stack

Meet DeepL

DeepL is a global AI product and research company focused on building secure, intelligent solutions to complex business problems. Over 200,000 business customers and millions of individuals across 228 global markets today trust DeepL's Language AI platform for human-like translation, improved writing and real-time voice translation. Building on a history of innovation, quality and security, DeepL continues to expand its offerings beyond the field of Language, including DeepL Agent - an autonomous AI assistant designed to transform the way businesses and knowledge workers get work done.

Founded in 2017 by CEO Jarek Kutylowski, DeepL now has over 1,000 passionate employees and is supported by world-renowned investors including Benchmark, IVP, and Index Ventures.

Our goal is to become the global leader in trusted, intelligent AI technology, building products that drive better communication, foster connections, and create a meaningful impact. To achieve this, we need talented people like you to join our journey. If you’re ready to shape the future of AI and grow your career in a fast-moving, purpose-driven environment, DeepL is your next destination.

What sets us apart is our blend of cutting-edge AI technology, meaningful work, and a culture where people truly thrive. We’re a team of innovators, researchers, and creators driven by a shared purpose to unlock human potential by making work simpler, smarter, and more connected.

When we share what it’s like to work at DeepL, the reactions are overwhelmingly positive. This might be because of our technology that helps millions of people and businesses communicate and work better every day, or because of the trust, curiosity, and care that shape our culture.

What we know for sure is this: being part of DeepL means joining a team dedicated to innovation, growth, and well‑being. Discover more about life at DeepL on Linked In, Instagram, and our Blog.

You will join DeepL Voice
, the team building the future of real‑time communication. We are the team behind Voice for Meetings and Voice for Conversations
—products that allow people to speak in their native language and be understood instantly by anyone, anywhere.

This is not a standard web development role. You will be working at the bleeding edge of Language AI, building the interfaces and systems that power live translation. We are a fast‑moving team with the energy of a startup and the resources of a global AI leader. We are solving problems that haven't been solved before, like creating stable, flicker‑free text streams in real‑time and integrating next‑gen Text-to-Speech models.

As a Software Engineer in Voice, you won't just be fixing bugs. You will be shipping features that define how the world communicates. You will learn from Senior Staff Engineers and Researchers, growing your skills in high-performance streaming, AI integration, and product engineering.

• Ship User-Facing Features: You will build and refine the interfaces for our mobile and web apps. You will ensure that when a user speaks, the translation appears instantly and clearly on the screen.

• Integrate Real-Time APIs: You will hook up our frontend applications to our Voice API
  , handling real-time data streams (Web Sockets/gRPC) and managing connection states gracefully on unstable networks.

• Optimize for Performance: You will hunt down milliseconds. You will use profiling tools to ensure our React components render instantly and our backend services process audio chunks efficiently.

• Collaborate & Learn: You will participate in code reviews and pair programming sessions. You will ask "Why?" when you see a design choice you don't understand, and you will use AI tools to speed up your boilerplate coding so you can focus on the hard logic.

• High Learning Trajectory (High Slope): You are excited by hard technical problems. You want to understand how WebRTC works, how LLMs process audio, and how to build apps that feel "instant."

• Full-Stack Curiosity: You are comfortable working with React/Type Script on the frontend and C# or Python on the backend. You…