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Machine Learning Engineer, Post-Training and Evaluation

nunchux ai • United State
Visa Sponsorship
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AI Summary

Build post-training pipelines to improve the efficiency and quality of multimodal generative AI models. Develop evaluation systems, benchmarks, and data pipelines to measure generation fidelity and performance. Requires strong Python and PyTorch skills with expertise in visual generative models and distributed training.

Key Highlights
Develop post-training recipes for image and video generation models
Create automated judges and benchmarks to measure model quality and efficiency
Integrate cutting-edge research into production-ready ML pipelines

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Key Responsibilities
Establish and validate post-training recipes for image and video generation models.
Curate and version training and benchmark data used for post-training and model evaluation.
Create benchmarks, automated judges, and run human preference studies to measure generation quality.
Measure models against baselines and identify quality regressions to inform release decisions.
Integrate current post-training and evaluation research methods into team pipelines.
Technical Skills Required
Python PyTorch Visual Generative Models

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Benefits & Perks
Base salary $180,000 to $250,000 USD
Equity
Health insurance
401(k)
Visa sponsorship (H-1B and others)

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Nice to Have
Experience distilling or fine-tuning large-scale diffusion or video-generation models
Experience building automated judges or reward models based on multimodal LLMs or VLMs
Experience with large-scale evaluation datasets, annotation pipelines, or preference data
Experience building agentic visual systems
Contributions to major open-source ML projects

Job Description

Nunchux AI builds infrastructure that makes multimodal generative AI faster and cheaper to serve, and easier to build on. Founded by MIT PhDs Muyang Li, Yujun Lin, and Zhekai Zhang with CMU Professor Jun-Yan Zhu, Nunchux brings together deep research expertise and production systems experience. Our work is built on nearly a decade of research from MIT and CMU, including nunchaku project, whose models have surpassed 4 million downloads. We have top VC backing, and we build for enterprises and for millions of developers.
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Job Overview
Posted Date Oct 13, 2026
Employment Type Full-time
Experience Level Not Applicable
Location United State
Category Machine Learning
Company nunchux ai
Mentioned Skills
python ai san pytorch deepspeed machine learning

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