Moderna Co-Op
Norwood, MA·129 interview reviews·Medium difficulty
Co-Op Interview Reviews
129The process was pretty straightforward. It started with an online assessment, followed by a phone screen, and concluded with a final interview round that had two LeetCode medium difficulty problems.
“Longest Substring Without Repeating Characters - Find the length of the longest substring without repeating characters”
The process was pretty straightforward. It started with an online assessment, followed by a phone screen, and concluded with a final interview round that had two LeetCode medium difficulty problems.
“Best Time to Buy and Sell Stock - Find the maximum profit from buying and selling one share of stock”
Straightforward — just 2 medium leetcode-tagged problems in 45 minutes. Very fast paced though so be aware of time. A few follow-up questions for the interviewer at the end. No behavioral questions.
“Tell me about a time when you had to work with a difficult team member”
Had a recruiter screen first, then a technical round focused on system design and coding. The interviewer was very professional and walked through the problem step by step. Good overall experience.
“LRU Cache - Design a data structure for Least Recently Used cache”
CodeSignal online assessment, then one 45-minute interview. Interviewer was friendly and helpful. 2 leetcode questions then 5 minutes for any questions I had. Got my results in a few days.
“1 LC easy, 1 LC medium”
About This Role
Frequently Asked Questions
How hard is it to get hired as a Co-Op at Moderna?
The interview difficulty is rated 3.2/5 by candidates. 68% report a positive experience. Focus on Python, Machine Learning, Statistics to improve your chances.
How long does the Moderna Co-Op hiring process take?
The process typically takes 2–6 weeks from application to final decision, depending on the hiring cycle and team availability.
What is the interview process like?
Most candidates go through a recruiter screen, followed by technical coding rounds, and a final interview loop. 67% of candidates applied online.
What questions are asked in a Moderna Co-Op interview?
Common topics include data structures & algorithms (arrays, trees, graphs), system design, and behavioral questions using the STAR method. Practice with our AI mock interviewer to prepare.
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