Senior Backend Engineer – FinTech & API Systems

DT One is seeking a Senior Software Engineer in Madrid, Spain, who is eager to contribute to the FinTech industry. The role involves designing and maintaining Spring Boot services, building API integrations, and ensuring reliable system performance. You’ll work within a dynamic team dedicated to supporting DT One's innovative eSim product, while promoting an environment based on learning and continuous feedback.

The ideal candidate possesses strong skills in Java/Kotlin and Spring Boot, and is ready to tackle technical challenges in a fast-paced, global setting.