Sebastian Enderlein | CTO, DeepL | Top 30 EMEA CTOs 2026

Career History

Since September 2024, Sebastian Enderlein has been CTO of DeepL, the German AI company known for its natural-sounding, AI-powered language translation. DeepL’s platform delivers fluent translations that accurately preserve meaning and style, making it a trusted choice for individuals and businesses worldwide.

Before joining DeepL, Enderlein spent four years at Personio, an HR software company. During his time, he was promoted from Vice President of Engineering to Executive Vice President of Engineering. He oversaw the consolidation of international growth and played a key role in scaling Personio into one of Europe’s leading tech companies, valued at $8.5bn. Earlier, he spent four years at Uber managing cloud infrastructure teams responsible for engineering on Amazon Web Services and Google Cloud Platform. Prior to that, he worked at Salesforce for six years, rising to Head of Cloud Infrastructure.

Enderlein earned both his Bachelor’s and Master’s degrees in Software Systems Engineering from the Hasso Plattner Institute in Brandenburg, completing them in 2008 and 2009 respectively.

About DeepL

DeepL began as Linguee in 2008, founded by Gereon Frahling and Leonard Fink, before launching the DeepL Translator product in 2017 under Jaroslaw Kutylowski. The company has since developed into a broader AI-powered language platform spanning translation, writing and real-time spoken communication.

In early 2024, DeepL raised $300m at a $2bn valuation, with backing from Index Ventures, ICONIQ Growth, IVP, Atomico and others. Since then, it has expanded beyond text-based products with DeepL Voice, including real-time voice-to-voice translation for meetings, conversations and customer interactions.

DeepL now serves more than 200,000 business customers worldwide, including major global enterprises, and continues to expand its enterprise language platform across text, writing and voice. In 2026, it also added Mixhalo’s ultra-low-latency audio technology to strengthen its real-time voice offering.