> Markdown version of [/jobs/ext/2708975-machine-learning-engineer](https://www.wearedevelopers.com/jobs/ext/2708975-machine-learning-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Machine Learning Engineer - **Company:** LC Manufacturing, LLC - **Location:** Palo Alto, United States (Remote available) - **Experience:** Expert - **Salary:** $195,200.0 - $262,200.0 - **Contract:** Permanent contract - **Skills:** Computer Clusters, Nvidia CUDA, Software Debugging, Distributed Computing Environment, Distributed Systems, Memory Management, InfiniBand, Python (Programming Language), Machine Learning, Remote Direct Memory Access, Pytorch, Large Language Models, Model Validation, Kubernetes, Free and Open-Source Software, Slurm, Machine Learning Operations, Data Pipelines - **Published:** September 4, 2026 - **Apply:** https://startup.jobs/senior-machine-learning-engineer-model-training-and-reinforcement-learning-nebius-8789193 ## About the Role * Strong Python and PyTorch engineering skills, with the ability to move quickly from idea to experiment to working system. * Hands-on experience across at least two of: model training, post-training/RL, applied modeling, data pipelines, or large-scale ML systems. * Ability to design rigorous experiments with baselines, ablations, metrics, and failure analysis. * Practical understanding of modern LLM behavior, instruction tuning, preference optimization, and evaluation challenges. * Practical understanding of transformer training bottlenecks, memory pressure, communication overhead, and checkpointing. * Ability to reason quantitatively about model quality, throughput, utilization, reliability, cost, and research velocity. * Strong communication skills and ability to collaborate with researchers, engineers, and leadership., * Experience with LLM post-training, RL, agents, reward modeling, synthetic data, or model evaluation. * Experience with RL frameworks or pipelines such as verl, slime, AReaL, OpenRLHF, TRL, or custom PPO/GRPO/RLHF systems. * Experience with Megatron-LM, DeepSpeed, PyTorch FSDP/DTensor, Ray, Slurm, or Kubernetes on large GPU clusters. * Familiarity with NCCL, CUDA, Triton, Nsight, InfiniBand/RDMA, and H100/H200/B200 clusters, or with model serving and inference optimization. * Publications, open-source contributions, or production impact in LLM post-training, RL, reasoning, coding models, synthetic data, distributed training, or evaluation. * Experience designing agent environments, tool-use tasks, or verifier-based rewards., Applicants must be authorized to work in the country in which they apply and will be required to provide proof of employment eligibility as a condition of hire. ## Description Nebius Token Factory is building an AI training and model post-training capability for frontier model improvement. This role owns the infrastructure that makes large-scale training and RL experiments possible, reliable, reproducible, and efficient. The work sits at the intersection of distributed systems, GPU performance, model training frameworks, RL pipelines, and production engineering. A Senior Machine Learning Engineer owns substantial ML work end to end. They can translate an ambiguous capability goal into concrete experiments, implement and debug training and RL recipes, build the supporting data and systems, and deliver measurable improvements in model quality, experiment throughput, and reliability. They are deeply hands-on and can independently debug both model-behavior failures and distributed training failures. Your responsibilities: * Design and run model-training and post-training experiments, including SFT, continued pretraining, preference optimization (DPO/IPO/KTO), and RL methods such as RLHF/RLAIF, PPO, and GRPO. * Build reward functions, judge models, verifiers, task environments, and evaluation sets for reasoning, coding, tool use, and agentic workflows. * Create synthetic data and data pipelines, including teacher-student generation, self-play, rejection sampling, filtering, and quality scoring. * Analyze model-behavior failures and turn them into targeted data, reward, or algorithm improvements. * Build and maintain distributed training and RL infrastructure using frameworks such as Megatron-LM, DeepSpeed, PyTorch FSDP/DTensor, Ray, verl, slime, AReaL, or OpenRLHF. * Implement and debug parallelism strategies (tensor, pipeline, sequence/context, expert, and data parallelism) and build reliable rollout, reward-serving, checkpointing, and experiment-orchestration components. * Profile and improve GPU utilization, memory usage, communication efficiency, training throughput, and inference/serving performance. * Design rigorous evaluations and ablations for capability, instruction following, reasoning, tool use, safety, and regression risk. * Write clear experiment plans, design docs, benchmark reports, and runbooks, and partner across research and platform teams. ## Related Videos - [Efficient deployment and inference of GPU-accelerated LLMs​](https://www.wearedevelopers.com/videos/929-efficient-deployment-and-inference-of-gpu-accelerated-llms) - [Understanding Kubernetes in a visual way](https://www.wearedevelopers.com/videos/100085-understanding-kubernetes-in-a-visual-way) - [Photonic Computing: Programming a New Class of AI Accelerators (incl. Live Coding)](https://www.wearedevelopers.com/videos/100196-photonic-computing-programming-a-new-class-of-ai-accelerators-incl-live-coding) - [Running Secure Life Science Research at Scale using Hybrid GPU HPC and Kubernetes 🧬](https://www.wearedevelopers.com/videos/100355-running-secure-life-science-research-at-scale-using-hybrid-gpu-hpc-and-kubernetes) - [Serverless deployment of (large) NLP models ](https://www.wearedevelopers.com/videos/158-serverless-deployment-of-large-nlp-models) - [LLMOps-driven fine-tuning, evaluation, and inference with NVIDIA NIM & NeMo Microservices](https://www.wearedevelopers.com/videos/1582-llmops-driven-fine-tuning-evaluation-and-inference-with-nvidia-nim-nemo-microservices) ## Related Articles - [What Are Large Language Models?](https://www.wearedevelopers.com/magazine/304-what-are-large-language-models) - [MLops – Deploying, Maintaining And Evolving Machine Learning Models in Production](https://www.wearedevelopers.com/magazine/115-mlops-deploying-maintaining-and-evolving-machine-learning-models-in-production) - [The Best Large Language Models on The Market](https://www.wearedevelopers.com/magazine/319-the-best-large-language-models-on-the-market) - [MLOps And AI Driven Development](https://www.wearedevelopers.com/magazine/82-mlops-and-ai-driven-development) - [MLOps – What’s the deal behind it?](https://www.wearedevelopers.com/magazine/125-mlops-what-s-the-deal-behind-it) - [How to Become an AI Engineer](https://www.wearedevelopers.com/magazine/331-how-to-become-an-ai-engineer)