Trainium NKI Kernel Expert

About Open Train

Open Train AI is hiring contractors for specialized AI training work. Open Train is the #1 platform for finding and building careers in AI training and data labeling, helping contributors discover projects, build a professional profile, and apply in minutes.

Creating an Open Train account is free, and this role offers an opportunity to contribute directly to the evaluation processes that help improve advanced AI systems.

AI training is the human side of building artificial intelligence. People with technical expertise review code, assess model outputs, and provide structured feedback that helps AI systems become more accurate, capable, and reliable.

In this role, your evaluation of NKI kernel development tasks will help improve the quality of training data used for advanced AI model development.

Open Train is recruiting a Trainium NKI Kernel Expert to evaluate the quality and correctness of NKI development tasks used to train advanced AI models. The work centers on CUDA-to-NKI migration fidelity, Trainium-specific performance optimization, and cross-platform numerical accuracy.

You will deliver clear, rubric-based written feedback on each task. The role is listed as entry level, while the technical requirements call for at least two years of hands-on NKI kernel development experience.

• Contractor and part-time opportunity
• US-based role
• 20+ hours per week
• English-language work
• $70-$90 per hour

You will assess technical implementation quality across NKI kernel development tasks and determine whether each solution is correct, appropriate for the target hardware, and aligned with defined evaluation standards.

• Evaluate NKI kernel development tasks for quality, correctness, and hardware appropriateness on AWS Trainium and Inferentia
  2.
• Assess CUDA-to-NKI migration fidelity and identify performance bottlenecks.
• Define and apply cross-platform numerical-correctness standards for GPU and Trainium implementations.
• Provide clear, detailed, rubric-based written feedback on each task.

This role requires specialized experience developing and evaluating kernels for AWS Trainium and Inferentia
2. Candidates should be comfortable analyzing low-level computation, memory movement, profiling data, migration quality, and numerical behavior across hardware platforms.

• At least 2 years of hands-on NKI kernel development targeting AWS Trainium or Inferentia
  2.
• Strong understanding of NKI tile-based computation, SBUF, PSUM, HBM memory hierarchy, partition-dimension constraints, and DMA orchestration.
• Demonstrated experience assessing CUDA-to-NKI migration quality.
• Familiarity with Trainium-specific profiling, including Neuron Core pipeline utilization, tensor-engine throughput, and memory bandwidth.
• Experience defining or evaluating GPU versus Trainium numerical-correctness standards.

The following experience is helpful for evaluating a broad range of NKI and Trainium tasks, but is listed as additional background rather than a required qualification.

• Experience with the AWS Neuron SDK or Neuron Compiler internals.
• Contributions to NKI kernel libraries.
• Prior CUDA or Triton kernel development.
• Familiarity with Neuron Core-v2 architecture and supported FP32, BF16, FP8, and INT8 data types.
• Experience benchmarking machine learning training workloads on Trn1 or Trn2 instances.

AI training and data-labeling work is a rapidly growing part of the technology industry. Technical reviewers help shape how modern AI systems perform by checking examples, code, and model behavior against rigorous standards.

This opportunity is especially suited to an expert who wants flexible, part-time work while contributing to cutting-edge AI development through detailed technical evaluation.