In 2021, Caroline de Gruyter began contributing as a columnist for Foreign Policy, where she writes about European politics and international relations. Her columns are known for their incisive analysis and have expanded her influence beyond Dutch media to an international audience.

In 2019, Caroline de Gruyter published 'Beter wordt het niet', a book that explores the challenges and opportunities facing Europe in the 21st century. The book was praised for its insightful analysis and compelling narrative, further establishing her as a leading voice on European issues.

Caroline de Gruyter was awarded the Anne Vondeling Prize in 2017 for her outstanding political journalism. The prize recognized her exceptional ability to explain complex European political issues to a broad audience, highlighting her influence and expertise in the field.

In 2015, Caroline de Gruyter took on the role of foreign correspondent in Vienna, Austria, for NRC Handelsblad. Her reporting from Vienna provided valuable insights into Central European politics and the region's relationship with the broader European Union.

Caroline de Gruyter published her book 'Zwembad in Europa' in 2013, which delves into the complexities of European integration and the challenges faced by the EU. The book received critical acclaim for its thorough research and engaging narrative, solidifying her reputation as an expert on European affairs.

In 2008, Caroline de Gruyter was appointed as a foreign correspondent in Brussels for NRC Handelsblad. During her tenure, she covered significant developments within the European Union, providing critical insights into the EU's policies and its impact on member states.

Caroline de Gruyter began her career with NRC Handelsblad in 1998, where she quickly established herself as a prominent voice in international journalism. Her work primarily focused on European politics, providing in-depth analysis and commentary on the evolving political landscape of the continent.