The interview process for a Senior Full Stack Java Developer at Delta Air Lines typically consists of two rounds. The first round is a technical interview focused on Java, Spring Boot, microservices, REST APIs, databases, and frontend technologies such as JavaScript and React or Angular, along with system design and real-world problem-solving scenarios. The second round combines behavioral and architectural discussions with the hiring manager and senior leadership, emphasizing design decisions, leadership experience, collaboration, and cultural fit. Overall, the process is structured, professional, and conversational, with a strong focus on practical experience, clear communication, and the ability to build scalable, reliable enterprise systems.