Fastenal Software Development Engineer (SDE) interview questions

Applying & Initial Screening Application stage You usually apply online through Fastenal’s website, which asks for your email to send a custom application link. From there, HR at their headquarters reviews your details to see if your qualifications match—a process that may take up to two weeks. **Phone screening (if you're an external candidate)** If they’re interested, you’ll be invited to a brief phone interview—often just 5 minutes long—where you can call in during business hours (Monday–Friday, 8 AM–5 PM CST). Candidates say questions here are simple but direct—things like: “Why Fastenal?” “How did you hear about us?” “Why are you a good fit?”

There are 3 round of interviews. First is Coding Round consists of 3 medium level question and MCQS. Second is Technical Round in which core subjects and DSA is asked. And third is HR Round