Senior Machine Learning Engineer/Machine Learning Engineer III

Workday•Seattle, WA

12h•Hybrid

About The Position

Workday is seeking a Senior Machine Learning Engineer/Machine Learning Engineer III to join their Agent Factory team. This team focuses on building production-grade AI agents that are deeply embedded into Workday's platform and used by millions of people daily. The role involves working at the intersection of AI, platform architecture, and human workflows, with the autonomy to shape how agents reason, act, and scale responsibly. The Agent Factory team is composed of small, senior, cross-functional AI teams that bring together product leaders, machine learning engineers, and full-stack builders. This is an opportunity to own problems end-to-end, collaborate tightly across disciplines, and use the right tools to solve real customer challenges at global scale. The company culture is rooted in integrity, empathy, and shared enthusiasm, looking for curious minds and courageous collaborators who bring sun-drenched optimism and drive.

Requirements

7+ years experience as a member of a data science, machine learning engineering, or other relevant software development team building applied machine learning products at scale, including taking products through applied research, design, implementation, production, and production-based evaluation (for P4 role).
5+ years experience as a member of a data science, machine learning engineering, or other relevant software development team building applied machine learning products at scale, including taking products through applied research, design, implementation, production, and production-based evaluation (for P3 role).
3+ years of professional experience in machine learning and deep learning frameworks & toolkits such as Pytorch, TensorFlow (for P4 role).
2+ years of professional experience in machine learning and deep learning frameworks & toolkits such as Pytorch, TensorFlow (for P3 role).
4+ years of professional experience in building services to host machine learning models in production at scale (for P4 role).
3+ years of professional experience in building services to host machine learning models in production at scale (for P3 role).
2+ years of demonstrated experience working with large language models (LLMs), text generation models, and/or graph neural network models for real-world use cases (for P4 role).
1+ years of demonstrated experience working with large language models (LLMs), text generation models, and/or graph neural network models for real-world use cases (for P3 role).
4+ years of proven experience with cloud computing platforms (e.g. AWS, GCP, etc.) (for P4 role).
3+ years of proven experience with cloud computing platforms (e.g. AWS, GCP, etc.) (for P3 role).
Bachelor’s (Master’s or PhD preferred) degree in engineering, computer science, physics, math or equivalent.

Nice To Haves

Master’s or PhD degree in engineering, computer science, physics, math or equivalent.
Deep understanding of statistical analysis, unsupervised and supervised machine learning algorithms, and natural language processing for information retrieval and/or recommendation system use cases.
Excellent interpersonal and communication skills, with the ability to build strong relationships across teams and stakeholders.

Responsibilities

Design and build the core ML systems behind Workday’s next generation of AI agents.
Own how models, agent logic, and orchestration layers come together in production—across the full lifecycle from problem framing and data strategy to deployment, monitoring, and continuous improvement.
Implement and evolve frameworks for LLM-powered agents, including RAG pipelines, workflow orchestration, evaluation, and feedback loops, ensuring solutions are scalable, observable, and enterprise-ready.
Partner closely with software engineers, product managers, and data scientists to integrate agents deeply into the Workday stack.
Stay hands-on with emerging techniques in agentic architectures while applying strong engineering judgment to turn them into systems that are reliable, explainable, and built to operate at global scale.
Lead, mentor, and/or manage ML Engineering teams, taking ownership of the development lifecycle and sprint planning.
Foster a culture of collaboration, transparency, innovation, and continuous improvement.
Stay up to date with advancements in AI, LLMs, RAG, autonomous agents and orchestration frameworks to drive innovation.
Independently solve ambiguous, open-ended problems and technically lead teams.