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

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 LinkedIn, Instagram, and our Blog.

Meet the team behind this journey

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.

Your responsibilities

• 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 (WebSockets/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.

Qualities we look for

• 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/TypeScript on the frontend and C# or Python on the backend. You aren't afraid to touch a part of the stack you haven't seen before.
• User Empathy: You understand that our users are often in high-pressure situations (business meetings, frontline customer service). You build software that is robust, simple, and reliable.
• Bias for Action: You embrace the startup speed. You prefer to ship a working prototype and iterate based on feedback rather than spending weeks on a perfect design that never sees the light of day.
• AI-Native Velocity: You leverage AI-powered tools (like GitHub Copilot or Claude) to accelerate your velocity and eliminate repetitive toil. You use AI for boilerplate code, test generation, and debugging, allowing you to focus your cognitive energy on high-value architectural decisions and complex problem-solving.

A Note on Our Hiring Process

DeepL hires for the Company , not just a specific team. We operate a Unified Engineering Pipeline . If you pass our bar, we will match you to the highest-priority role that fits your skillset—whether that is in Core Product, Platform, Voice, or Enterprise. We prioritize "Missionaries" who want to solve the biggest problems, wherever they live in the stack.

What we offer

• Diverse and internationally distributed team: joining our team means becoming part of a large, global community with people of more than 90 nationalities. We're more than just colleagues; we're a group of professionals with a shared mission to connect diverse cultures. Our global presence is growing–we've doubled in size nearly every year, with our employees based in the UK, Germany, the Netherlands, Poland, the US, and Japan, and we continue to expand our network.
• Open communication, regular feedback: as a language-focused company, we value the importance of clear, honest communication. We value smooth collaboration, direct and actionable feedback, and believe that leading with empathy and growth mindset makes us better together.
• Hybrid work, flexible hours: we offer a hybrid work schedule, with team members coming into the office twice a week. This allows you to engage directly with your team and experience the unique energy of our workspace, while still enjoying the flexibility and comfort of working from home. With flexible working hours and trust in your productivity, we are in sync with your team’s general locations and time zones to foster effective and seamless collaboration.
• Virtual Shares - An ownership mindset in every role. We believe everyone should share in our success, and that’s why every employee receives Virtual Shares, linking your contribution directly to DeepL’s growth and rewarding you with a stake in our future.
• Regular in-person team events: we bond over vibrant events that are as unique as our team, from local team and business unit gatherings, to new-joiner onboardings, to company-wide events that bring us all together–literally.
• Monthly full-day hacking sessions: every month, we have Hack Fridays, where you can spend your time diving into a project you're passionate about and get the opportunity to work with other teams–we value your initiatives, impact, and creativity.
• 30 days of annual leave: we value your peace of mind. With 30 days off (excluding public holidays) and access to mental health resources, we make sure you're as strong mentally as you are professionally.
• Competitive benefits: just as our team spans the globe, so does our benefits package. We've crafted it to reflect the diversity of our team and tailored it to align with your unique location, to ensure you feel supported every step of the way.

If this role and our mission resonate with you, but you're hesitant because you don't check all the boxes, don't let that hold you back. At DeepL, it's all about the value you bring and the growth we can foster together. Go ahead, apply—let's discover your potential together. We can't wait to meet you!

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.