GPU Kernel Expert
$70–90/hr
Remote coding contract with Mercor, $70–90/hr, open to people in United States. Posted Aug 25.
$70–90/hr
Apply on MercorIs this job worth applying to?
- Pay
- About typicalTops out at $90/hr. The typical top rate across 237 priced coding listings is $90/hr.
- Getting in
- Some screening~30 min: resume upload + 20-min AI interview. Resume showing real experience in your field.
- Steady work
- Work is patchyProjects can pause or end with little notice.
- Payout record
- Pays on timeSchedule: weekly, every Wednesday. Paid via Stripe (Wise in a few countries).
- Freshness
- Older postPosted 2mo ago. Still listed on Mercor on Nov 6, 2026.
- Where you live
- Named countries onlyOpen in United States.
The job description
Evaluate the quality, correctness, and completeness of GPU/accelerator kernel development tasks used to train and evaluate a frontier AI lab's models. You'll assess numerical correctness, performance-benchmarking fairness, task scoping, and compilation/runtime validity across diverse kernel task types — and provide clear, rubric-based written feedback.
Basic Qualifications
- 3+ years of hands-on experience developing, optimizing, or verifying GPU/accelerator kernels in at least two of: CUDA, Triton, NKI, or Pallas (JAX)
- Strong understanding of numerical-correctness criteria for kernels (absolute/relative/ULP tolerances, reference-implementation selection)
- Demonstrated experience with performance profiling and benchmarking (nsight, ncu, roofline analysis, or framework-native profilers)
- Familiarity with common compilation and runtime failure modes (driver mismatches, OOM, launch-configuration errors, shape/stride mismatches, autotuning failures)
- Experience with at least three kernel task types: generation from specification, translation/lowering across frameworks, migration between hardware targets, debugging, performance optimization, or operator fusion
Preferred Qualifications
- Experience across both NVIDIA GPU (CUDA/Triton) and custom-accelerator (NKI/Pallas/TPU) ecosystems
- Background in compiler engineering, MLIR, or intermediate-representation lowering
- Understanding of memory-hierarchy optimization (shared-memory tiling, register pressure, bank conflicts, coalescing patterns)
- Contributions to kernel libraries (cuBLAS, cuDNN, Triton community kernels, JAX/XLA custom calls)
How do you apply to Mercor?
Apply on Mercor
The Apply button opens this post on Mercor's own site. You apply with them, not with Rubric. Budget about 30 min: resume upload + 20-min AI interview.
Get through screening
What Mercor asks for after you apply:
- Take the recorded AI video interview (practice round available)
- Complete any role-specific assessment and the ID check
- Accept the offer and sign the contract
Start work and get paid
Pay schedule: weekly, every Wednesday. Paid via Stripe (Wise in a few countries). You're paid for the work they hand out, not a fixed salary.
Mercor also needs
- Resume showing real experience in your field
- Webcam with your full face visible for the AI interview
- Government ID
Red flags
- Red flagLong waits with no offer after passing the interview
- Red flagProjects ending abruptly with little warning
What is Mercor like to work for?
Hiring marketplace that screens professionals with an AI video interview and places them on hourly contracts training and evaluating models for AI labs.
| Advertised pay | $20–200/hr |
|---|---|
| Getting in | Some screening |
| Application takes | ~30 min: resume upload + 20-min AI interview |
| How you get paid | Weekly, every Wednesday, via Stripe (Wise in a few countries) |
| Payout record | Pays on time |
| Countries | Hires in many countries and runs its pay week on India Standard Time; Mercor keeps a list of locations it cannot onboard, and some projects are US-only. |
Most listings sit around $50–100/hr; healthcare, legal and finance roles pay the most, language and generalist roles the least.