Senior Backend Engineer Interview Questions

2,797 senior backend engineer interview questions shared by candidates

How would you optimise a full stack application fetching lots of data? How would you handle a ticket queue with millions of users? Would you use WebSockets, long polling or SSE to handle this? Explain the tradeoffs.
avatar

Senior Backend Engineer

Interviewed at Tomorrowland (Belgium)

3.8
Jun 24, 2025

How would you optimise a full stack application fetching lots of data? How would you handle a ticket queue with millions of users? Would you use WebSockets, long polling or SSE to handle this? Explain the tradeoffs.

Viewing 1981 - 1990 interview questions

Glassdoor has 2,797 interview questions and reports from Senior backend engineer interviews. Prepare for your interview. Get hired. Love your job.