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Thorlabs Interview Questions
& Process

Real candidates share what happened, how many rounds they had,
and how the experience turned out.

Based on 44 interview experiences · FREE TO READ

2.4 Rounds average
Average Typical difficulty
56.8% Positive experience

Which role are you interviewing for?

17 roles · 44 reports

Candidate interview experiences

First-hand accounts from people who interviewed at Thorlabs.

Showing 4 of 44
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Scientific Writer

Research · a year ago

Entry Easy Positive experience No offer 3 rounds
Interview process
Take home Recruiter call Phone screen
Interview formats
Technical Behavioral

They initially requested a technical writing sample. Following that, I had a brief phone chat with the hiring manager, and then a 30-minute call with the direct manager. Although I found the job posting on Google stating it was remote, I learned during the interview that it's actually a hybrid role based in North Jersey. Since I'm not looking to relocate, I had to decline the offer.

Confirmed questions1 question
  • Can you tell me about the optical setups you know?
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Thorlabs

Software Quality Assurance Analyst

Engineering · a year ago

Entry Difficult Negative experience No offer 2 rounds
Interview process
Recruiter call Technical screen Onsite
Interview formats
Behavioral Technical

I had an interview with ThorLabs back in March for a software quality assurance gig. It was a two-part interview process. First up, I had a chat with the manager to see if I was a good fit. He also had me share my screen and asked me questions about how I'd test their website. Then, I had a two-hour call with four people from Thor who I would have worked with from different departments. Each of them gave me a technical test where they shared their screen and asked me to walk them through areas of Thor’s website I would test, right then and there. Anyone who’s done QA knows that just looking at an app or website and instantly knowing every single area to test isn't really a solid way to gauge a QA tester's skill. Test cases are usually made by actually using the product over time and getting input from developers on what they need. So, that should have been a bit of a warning sign, but I kept going. After the interview, I sent personalized thank you emails to everyone I spoke with, but then the manager ghosted me. I tried to get an update a few times, but never heard back. I put in hours preparing for and doing these tough, test-heavy interviews. I focused on Thor when I could have been exploring other options. At the very least, candidates deserve a quick automated email saying someone else got the job. I won't be applying to Thor again and wouldn't recommend this experience.

Confirmed questions3 questions
  • Can you tell me about your experience working with people from different departments?
  • Describe your experience testing websites.
  • Walk me through how you would test different areas of Thor's website on the spot.
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Thorlabs

Events Coordinator

Operations · more than a year ago

Entry Average Negative experience No offer 3 rounds
Interview process
Recruiter call Phone screen Onsite Offer
Interview formats
Behavioral Technical

Sent my resume, got a call super quick, then had a phone interview not long after. After that, I went in for an in-person interview. They said I'd hear back in 2 days, but I didn't get anything. It's been over a week and I just got a generic 'thanks but no thanks' email, even after all the interviews.

Confirmed questions2 questions
  • What are some typical interview questions you might ask?
  • Can you describe what if scenarios you might encounter?
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Thorlabs

Technical Writer

Engineering · more than a year ago

Entry Average Positive experience Decline offer 5 rounds
Interview process
Phone screen Onsite Presentation Background check Offer
Interview formats
Behavioral Technical Presentation

I had an hour-long phone screen, and then they flew me out for an in-person interview, covering all my expenses. At the interview, I first met with the hiring manager. Then, I met with three people currently in the role. They asked a lot about my past work and my reasons for wanting to move into industry from academia. For a technical test, I was given product info documents to review and critique. We had lunch, and I had one more interview before finishing up for the day. It was generally a positive experience, but I declined the offer due to the location.

Confirmed questions5 questions
  • Could you identify the issues with the provided graph?
  • What are your motivations for transitioning from a research background to a writing career?
  • Can you discuss your previous professional experiences?

Thorlabs Interview Questions

Quoted word for word from Thorlabs interview reports.

What does a modelocked laser tell us about its optical spectrum?

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Could you explain the working principle of a mode-lock laser?

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Can you explain the difference between Phase contrast and Confocal Microscope?

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Which microscope would you choose if you needed to examine a biological tissue sample?

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Could you draw the isometric, side, and front views of this small mechanical part?

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Could you explain how to expand a beam using two lenses?

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What advantages come with object-oriented programming?

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Could you identify the issues with the provided graph?

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Formats, difficulty and experience

Across all 44 Thorlabs interview reports.

Interview formats

Behavioral 47.1%
Technical 39.1%
Presentation 6.9%
Other 3.4%
Coding 2.3%

Interview difficulty

Easy 15.9%
Average 65.9%
Difficult 18.2%

Candidate experience

Negative 22.7%
Positive 56.8%
Neutral 20.5%

Reports by job function

Engineering 28
Operations 6
Research 5
Sales 2
Other 2
Analytics 1