Principal Engineer • Lead

Who you are

You have a strong background in software engineering with a focus on Machine Learning and AI technologies — your experience includes managing fine-tuning systems for large foundation models and implementing end-to-end training pipelines. You are well-versed in the intricacies of Large Language Models (LLMs) and understand the challenges of multi-node orchestration and cost-efficient scaling.

Your technical expertise extends to building robust infrastructure for agent execution and dataset management — you have a knack for ensuring reproducibility and efficiency in model training processes. You thrive in collaborative environments, working closely with product, business, and platform teams to shape core abstractions and APIs.

You possess a deep understanding of architectural decisions related to training runtimes and model lifecycle management — your ability to influence these decisions is backed by your hands-on experience in the field. You are passionate about driving meaningful innovation and making a tangible impact in the AI space.

Desirable

Experience with reinforcement learning and distillation pipelines is a plus — you have a keen interest in preference optimization and policy optimization techniques. Familiarity with tools like Docker and Kubernetes will enhance your ability to contribute to the team's success.

What you'll do

As a Principal Engineer at Crusoe, you will lead the development of a managed platform that supports the entire application development lifecycle — your role will involve overseeing the fine-tuning of large foundation models and ensuring the scalability of training pipelines. You will implement and maintain systems that facilitate efficient model training and evaluation, focusing on reproducibility and versioning.

You will collaborate with cross-functional teams to define and refine the core abstractions and APIs of the system — your insights will help shape the long-term architectural vision for the platform. You will also engage in discussions around training runtimes, scheduling, and storage solutions, ensuring that the infrastructure meets the evolving needs of the organization.

Your contributions will not only drive the technical direction of the team but also foster a culture of innovation and collaboration — you will mentor junior engineers and share your knowledge to elevate the team's capabilities. You will be at the forefront of the AI revolution, working with sustainable technology that aligns with Crusoe's mission to accelerate the abundance of energy and intelligence.

What we offer

At Crusoe, you will be part of a team that is setting the pace for responsible, transformative cloud infrastructure — we offer a dynamic work environment where your contributions will have a direct impact on the future of AI. You will have the opportunity to work on cutting-edge technologies and be involved in projects that push the boundaries of what is possible.

We encourage you to apply even if your experience doesn't match every requirement — we value diverse perspectives and believe that a variety of experiences enriches our team. Join us in our mission to create ambitiously with AI, without sacrificing scale, speed, or sustainability.