Staff Software Engineer - API

About DeepL

DeepL, Europe's leading AI company since 2017, is dedicated to breaking down language barriers and bringing cultures closer together. Our expertise in AI and neural networks has enabled us to create cutting-edge communication technologies for businesses, including the acclaimed DeepL Translator which offers 30+ languages, and DeepL Write, our AI writing companion. Our core offering includes a suite of products and tools made for businesses to communicate more effectively, both internally and with their customers around the globe.

Meet the team behind this journey

Thanks to our unique neural networks, DeepL is able to deliver the world’s best translation quality. Many thousands of users use our API to bring our translations into their applications, translating billions of characters per month.

As a Staff Software Engineer you will work with DeepL API team’s mission is to make our AI easy to use by providing open source libraries in a wide range of programming languages - to date we have released client libraries for Python, .NET, Node.js, PHP, and Java. You can find more on our GitHub: https://github.com/DeepLcom.

The API team works closely with our core product team and solution consultants to bring our API customers our latest innovations to solve their business needs, and is a highly experienced cross-functional team based in our newly formed NY tech hub.

The team builds our backend services (C#, ASP.NET Core), adding exciting new API features. The team is also responsible for developing our client libraries and making sure that they deliver value to the developer community.

Requirements

Your responsibilities

• Facilitate and proactively shape the overall architecture of systems owned by API & Partnerships Tech teams

• Align and influence the architectural direction with other staff and principal engineers across the business vertical

• Provide hands-on technical leadership on projects with a size and scope of more than one team

• Develop and maintain open-source client libraries for the DeepL API in several programming languages

• Contribute to monitoring the API services in production, e.g. by defining expressive metrics and ensuring informative logs

• Mentor, develop and coach other software engineers

Qualities we look for

• Strong proficiency in backend software development with C# and ASP.NET Core

• Experience with the design of Web APIs

• Solid understanding of algorithmic complexity and common data structures

• Effective and pragmatic; you can weigh between 'perfect' and 'good enough' depending on priorities and business impact

• Proactive and proficient in stakeholder communication in English, ensuring clear and effective interactions

• Experience with a wide range of observability practices (SLOs, Dashboards, Alerts,..) for business critical systems

• Experience with Domain Driven Design (DDD) is a plus

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.

- Competitive salary, high-growth scale-up: We offer a competitive salary, stock options, and the experience of a fast-growing scale-up. We've doubled in size year-over-year, so come and be part of our US story, where your contributions not only add up–they multiply.

- 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 makes us better together.

- Hybrid work, flexible hours: We offer a hybrid work schedule, working sev