Delta Air Lines Software Engineer Interview Guide

Our candidates report that Delta is much less interested in abstract algorithm performance than in whether you’ve actually shipped in the stack you claim. Across experiences, the same pattern shows up: questions about Java core, Spring Boot, Unix, AWS, and deployment tooling come up alongside resume walkthroughs, and even the coding portions tend to stay grounded in practical work rather than puzzle-solving. We’ve also seen very specific systems questions — from Red Hat Linux servers and jumphost access to EC2, S3, API Gateway, CDK, and REST APIs — which tells us Delta is screening for engineers who can operate in real production environments, not just talk through textbook concepts.

A recurring theme is that the interviewers want evidence you can connect technical depth to day-to-day collaboration. Candidates were asked about mentoring SDETs, handling developer-tester conflict, and explaining how they got teammates aligned on a plan while still meeting a deadline. That combination suggests Delta values engineers who are steady operators: people who can debug, deploy, and communicate without drama. The non-obvious make-or-break factor here is specificity. Our candidates who did well were able to speak concretely about past projects, while weaker experiences seemed to come from sounding generic on cloud or systems knowledge. If your background is real, Delta seems willing to engage; if it’s thin, the questions quickly expose that gap.