Senior Backend Engineer C| | Write Tech

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.

Meet the team

Thanks to our unique neural networks, DeepL is able to deliver the world's best quality translations. To keep it that way, we are constantly improving our apps and adding exciting new features - and this is where your experience in developing sophisticated software comes in.

By joining our Write Tech team, you will work at the cutting edge of DeepL’s technological innovation building new LLM-based features for DeepL Write, our AI-powered writing assistant. This team works closely with our colleagues in Research to create and integrate new features based on the models they build. After a year in the beta testing phase, DeepL Write has now become a key part of our product offering and through your contributions to this team, you will help us to make this a world-class AI product. You will be part of a highly motivated team that values easy to maintain and efficient code, where important design decisions are made by the whole group in open discussions.

Your Responsibilities
• Design, implement and maintain reliable, scalable and backend services for DeepL Write
• Closely collaborate with our Research teams to bring the new functionality of their models to our end users via new features and integrations
• Contribute to monitoring and debugging the services in production, e.g. by defining expressive metrics and ensuring expressive logs
• Collaborate across teams to define shared interfaces and ensure smooth operation in production

Qualities we look for
• Several years of professional experience in software development
• Strong proficiency of C# and .NET Core
• Experience of server-side frameworks, preferably ASP.NET Core
• Solid understanding of computational complexity and common data structures
• Effective and pragmatic: ability to balance 'perfect' and 'good enough' depending on priorities and business impact
• Strong team player, experienced in working across: leading, contributing and collaborating
• Curious about learning and understanding technologies, whether programming languages, libraries, tools or systems
• Fluent in English. Knowledge of other languages an advantage

Ideally, you have one or more of the following qualifications:
• Experience developing backend services for AI/ML powered products
• High-level understanding of frontend services, even better if you directly worked on them yourself alongside your backend focus
• Experience in developing and operating large-scale, high-reliability architectures

What We Offer
• Diverse and internationally distributed team: joining our team means becoming part of a large, global community with people of more than +0 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.
• 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.

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.