Dataford
Interview QuestionsInterview GuidesExperiencesMock InterviewsPricing
Get started

Migrate Monolith to Microservices

HardExecution00:00
Practice interviewer
In session
5 left
00:00

Your question is Migrate Monolith to Microservices. Take a moment with it on the right.

Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).

You need to log in / sign up to chat or submit.

Migration Challenge

You are the EM responsible for moving a legacy monolith to microservices without downtime. The system still powers live customer traffic, billing, and other critical workflows, so the migration has to preserve correctness while improving delivery speed.

Operating Constraints

team·6 backend, 2 frontend, 1 SREtraffic·8M requests/daydeadline·6 monthsdowntime·0 minuteslegacy_size·1.4M lines of code

Interview Prompt

Walk me through how you would migrate the monolith to microservices without downtime.