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PhD Physicist — Frontier Reasoning Trajectory Writer

Mercor Remote

Education

Any

Type

hourly

Pay Rate (by country)

$80–$120/hr

Listed

61d ago

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About this Role

From the Mercor listing

Produce "golden trajectories" for hard physics problems: complete, step-by-step solution walkthroughs where every reasoning step is sound, the final answer is correct, and the work is organized around a sensible upfront plan. You'll work in Studio, iterate with a frontier LLM to draft and refine the reasoning, and produce trajectories that are clean enough to use as training data. The problems are provably hard — we screen them by running a frontier LLM on each problem five times and requiring it to fail at least once.

We need physicists with a theoretical or computational specialization in one of:

  • Astrophysics (theory / numerical)
  • Condensed matter (theory)
  • Quantum physics / quantum information
  • Particle / high-energy physics
  • PhD in physics, or in the final 1-2 years of a PhD program, from a credible research institution
  • Daily-driver fluency in LaTeX (for derivations) and Python (for numerical sanity checks and plotting)
  • Comfort with iterative LLM workflows — willing to nudge models with hints, identify reasoning errors, and shape an exploration into a clean trajectory
  • Detail-oriented; comfortable producing publication-grade derivations

Requirements

  • Must be eligible to work in Remote
  • Fluent proficiency in English (Written & Verbal)
  • Reliable high-speed internet connection
  • Bachelor's degree or equivalent professional experience
  • Demonstrated expertise in STEM

Why This Role

Shape the "brain" of future AI. By working as a PhD Physicist — Frontier Reasoning Trajectory Writer, you ensure that future models understand the nuance of your field. At $100/hr, it's a lucrative way to preserve the integrity of your profession in the digital age.

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Frequently Asked Questions

Is Mercor for freelancers or full-time contractors?

Mercor places you with one client for a defined engagement, like 'Python Tutor for 3 months', rather than having you grab small tasks from a shared queue. Most roles function as steady contract work, not one-off gigs.

Does Mercor's application require an on-camera interview?

Yes, every applicant records a video interview with an AI interviewer that asks questions about your resume. Clients review that recording to judge communication skills before matching, so there's no way to apply without going on camera.

Does it cost money to apply to Mercor?

No, applying and joining Mercor is free. Mercor's revenue comes from a fee it charges the client on top of your hourly rate, not from applicants. Treat any request for payment to join as a red flag.

Is AI training work the same as traditional consulting?

No. Instead of client deliverables, you're given complex scenarios to evaluate: grading the AI's logic, correcting its hallucinations, and supplying expert-level reasoning it doesn't have on its own. The job is closer to teaching than consulting.

Why do these AI training roles pay so much?

Because general knowledge isn't what's being tested. The model already knows the basics; what it needs is expertise on edge cases, the rare, difficult, highly technical judgment calls only a senior professional in the field would make correctly.

What does the day-to-day workload look like for elite-expert AI training roles?

Slow and deep, not fast and repetitive. A single task can take 45-60 minutes of researching citations or verifying complex calculations. Quality is what's being measured here, not throughput.

What does STEM work look like for a PhD Physicist — Frontier Reasoning Trajectory Writer?

Tasks here are scoped to STEM, not generic labeling. As a PhD Physicist — Frontier Reasoning Trajectory Writer, expect to draw on real domain judgment (evaluating outputs, correcting errors, or providing expert reasoning specific to STEM) rather than following a one-size-fits-all rubric. If you don't have hands-on STEM background, this is likely not the right listing to start with.

What happens when I click Apply on this listing?

You'll be taken to Mercor's external site to complete your application there. This listing links through a referral, but the process is identical to applying directly; the link just routes you correctly. Create an account on their site and follow their onboarding steps.

How soon will I start working after applying to Mercor?

Not immediately. Mercor is a talent marketplace, not a task queue, so applying puts you in a pool of candidates. You start working only once a specific client, like a major AI lab, selects your profile, and that matching process can take weeks.