Mercor AI Interview: My First AI Interview and the Polite Rejection Email

What I Learned About Performance, Preparation, and Breaking the “Practice Until Perfect” Cycle

I first learned about Mercor from a YouTube video. The job posting was unique. The company was in search of experts in Business. Well, I thought, I have an MBA. I will give it a shot.

While registering on the site, I realized there was an interview required. Not just any interview. An AI interview.

This would be my first AI interview. And that realization fostered anxiety. My mind instantly went to a traditional interview that I bombed.

The Anxiety of the Unknown

I did not take the interview right away. I searched the internet for information about what to expect.

What I found online was the suggestion that you need to be able to confidently verbalize your skills and experience by explaining your current role . The AI interviewer focuses on actionable depth—questions about projects, architecture, tradeoffs, and situational reasoning . It is not a human. It does not offer small talk. It just asks, and listens, and follows up.

I do not know about you, but I am more of a doer than a talker. I learn a job. I do that job. No performance.

For that reason, I decided to prepare.

Two Weeks of Practice

I decided to prepare for the interview by recording myself answering questions while looking directly into the camera.

I practiced off and on for two weeks. I actually mastered a couple of the responses that I had crafted.

The AI interview format at Mercor is structured but adaptive. According to the platform’s documentation, the AI joins a video call and has a real-time conversation based on full context about a candidate’s background—from companies they have previously worked at to their most impressive personal projects . It asks follow-up questions based on your answers . There is no human on the other end, but the system is designed to probe like one.

I treated it like a traditional interview. I rehearsed. I refined. I tried to perfect my delivery.

Then one day, it dawned on me.

The Realization

I was practicing for something that I had no experience of doing.

What if I continued down this path and finally completed the interview, only to confront the fact that I had prepared in the wrong way? What if all that practice was for a format I did not actually understand?

It was at that moment that I decided to have the experience.

Without allowing myself to practice again, I logged into Mercor and completed the Domain Expert Interview.

The Assessment

The interview itself is called an “Assessment” on the platform. You can retake it. That was important to know. According to Mercor’s preparation guide, candidates can retake the assessment if needed—but the system is designed to reward improvements, not endless attempts .

Did I do great? No.

Did I immediately retake the assessment? Also no.

I opted to apply to two positions. This would allow me to confirm my performance with either a job offer or a decline email. I wanted data. I wanted to know where I actually stood.

After submitting both applications, I was greeted with a message informing me that I would be contacted in four weeks.

The Rejection

Within a week, I received a very polite rejection email.

“Thank you for applying to the Financial and Investment Analysts role. While the hiring manager is not advancing your application, this is based on project constraints rather than any lack of strength in your profile.

Your background suggests significant potential, and you will continue to be considered within our pool of high-potential candidates who may qualify for instant offers as roles open.

Best, The Mercor Team”

It was a rejection. But it was a kind one. It blamed project constraints, not my qualifications. Whether that was genuine or standard language, I appreciated the tone.

Mercor has raised significant funding—$100 million at a $2 billion valuation in early 2025, with later reporting suggesting a $10 billion+ valuation target tied to roughly $450 million in annual recurring revenue . They are a legitimate, well-funded company. The rejection stung less because the email acknowledged my potential.

But I still did not get the role.

What I Gained

Overall, I am glad I broke my cycle of “practice until it is perfect.”

By having the experience, I learned what I actually needed to work on.

Even though I did not do well in the Mercor Domain Expert Interview, I gained confidence. I was able to complete the Merdial Marketplace AI Interview soon after. Upon completing that interview, I felt that I had done well.

The first AI interview was the hardest. The second was easier. That is the value of experience.

What I Learned About Mercor’s AI Interview

What Others Are Saying About Mercor

Other candidates have described the Mercor AI interview as “smooth,” “engaging,” and “surprisingly human in its follow-up” . One reviewer noted that the system asked intelligent follow-up questions but did cut them off a few times while they were explaining their thoughts . Another called it “one of the smoothest AI interview experiences I have had,” noting that the AI asked structured follow-ups and clarified points like a real interviewer .

However, some reviewers have raised concerns about role authenticity and the purpose of AI interviews . The platform has also faced criticism about recruiter domain knowledge gaps—the human side not always matching the sophistication of the AI .

For me, the AI interview was a learning experience. I am glad I did it. I am also glad I stopped over-preparing and just took the test.

What Is Next for Me

For now, I will take a break from applying to AI training roles until I brush up on my skills.

I will refresh my memory and learn new concepts specific to my domain—Business, Finance, Investment Analysis. After mastering this, I will take the Domain Expert Interview again.

I am viewing my investment in refreshing and learning skills as an investment that will eventually pay off—not only in AI trainer roles but in other remote job opportunities as well.

Mercor keeps your profile active. According to their platform, you “apply once” and can be considered by many companies . My profile is still there. My AI interview is still on file. When roles open that match my skills, I may be considered.

That is more than many platforms offer.

What You Should Know Before Taking a Mercor AI Interview

If you are considering applying to Mercor, here is what I learned:

Final Thoughts

I learned about Mercor from a YouTube video. I have an MBA, so I applied. Then I saw the AI interview requirement and felt the anxiety rise. I remembered a past interview I had bombed. I did not want to repeat that feeling.

I practiced for two weeks. I recorded myself. I crafted responses. Then I realized I was preparing for something I had never experienced. So I stopped preparing and just took the test.

I did not do great. I received a polite rejection email. But I gained confidence. I learned what I actually needed to work on. And I took another AI interview soon after—and felt good about it.

Sometimes the best preparation is not more practice. It is simply having the experience.

I will refresh my skills. I will try again. And eventually, the right opportunity will come.

Key Takeaways

This article is based on my personal experience applying to Mercor for a Business Domain Expert role. I am sharing this to help other job seekers navigate AI interviews and break the cycle of over-preparation.