Senior Machine Learning Engineer - AI Platform

Workday•Boulder, CO

10d•$163,000 - $288,000•Hybrid

About The Position

Workday is seeking a Senior Machine Learning Engineer to join their AI Core team. This role involves developing AI-powered software that impacts millions of users daily, focusing on challenging problems at the intersection of machine learning, agentic reasoning, and enterprise-scale systems. The team delivers critical AI platform capabilities and differentiated agent applications. The engineer will develop tailored user experiences using advanced Agentic AI, LLMs, and RAG, collaborate on ML solutions across Workday's product ecosystem, and use current software and data engineering stacks for ML model training, deployment, and lifecycle management. They will also develop and deploy new APIs/services using Docker/Kubernetes at scale and leverage Workday’s computing resources on rich datasets. The role requires a strong technical leader with deep Python expertise and solid software engineering skills, capable of writing well-designed code and delivering solutions efficiently. Responsibilities include owning the exploration, design, and implementation of features for ML platforms, pipelines, and services, ensuring their evaluation, scalability, and observability. The engineer will apply ML techniques like LLMs and natural language understanding to analyze large sets of HR and Finance text data, design and launch cloud-based ML architectures, stay updated on AI advancements, and serve as a technical role model for junior engineers.

Requirements

Bachelor’s (Master’s or PhD preferred) degree in engineering, data/computer science, physics, math or equivalent
6+ yrs 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
5+ years of professional experience with Python and supporting numeric libraries, with experience in shipping production code and models
5+ years of professional experience with cloud computing platforms (e.g. AWS, GCP, etc.)
Deep understanding of statistical analysis, unsupervised and supervised machine learning algorithms, and natural language processing for information retrieval and/or recommendation system use cases
Professional experience in independently solving ambiguous, open-ended problems and technically leading teams

Nice To Haves

3+ years of experience in building information retrieval systems and/or graph-based recommendation systems.
3+ years of hands-on professional experience in developing large language models (LLMs), text generation models, or graph-based machine learning models for production, including data processing, model fine-tuning, model deployment and model evaluation
3+ years of experience building services to host machine learning models in production at scale
3+ years of experience in machine learning and deep learning frameworks & toolkits such as PySpark, Pytorch, TensorFlow, and Sklearn
3+ years of professional experience with data engineering and data wrangling using e.g. Pandas and PySpark and other industry tools used to build scalable machine learning systems, such as Kubernetes and Docker

Responsibilities

Own exploration, design and implementation of features for our sophisticated ML platforms, pipelines and services.
Be responsible for evaluation, scalability and observability of these features.
Apply machine learning techniques including LLMs and natural language understanding to analyze large sets of HR and Finance-related text data, and design and launch pioneering cloud-based machine learning architectures
Stay up to date with advancements in AI, LLMs, RAG, autonomous agents and orchestration frameworks to drive innovation
Serve as a technical role model for more junior engineers