AI Engineer 5 (MLX)

Capital One; New York (NY); On-site; USD 150,000 - 190,000; Full time

Job summary

Capital One is seeking an AI Engineer 5 (MLX) to help build responsible and reliable AI systems across banking products. You will partner with engineers, researchers, program managers, and product managers to deliver AI-powered solutions that impact both associates and customers in real time.

You will design, train and deploy foundational models, conduct inference, manage multi-model workflows, and optimize performance, cost, and latency at scale.

Responsibilities

• Partner with cross-functional teams to deliver AI-powered products.
• Design, develop, test, deploy, and support AI software components including foundation model training, LLM inference, agents and multi-agent workflows.
• Utilize Open Source and SaaS AI tech such as AWS Ultraclusters, Huggingface, VectorDBs and PyTorch.
• Innovate model optimization techniques to improve performance, cost, latency and throughput of large-scale AI systems.
• Contribute to the long-term technical vision and roadmap of foundational AI systems at Capital One.
• Design and optimize multi-model orchestration pipelines integrating LLMs, vector search, and domain models.
• Lead cost-performance governance reviews across AI systems, tracking GPU usage and model throughput.
• Chair design reviews to ensure consistency with AI engineering standards.
• Mentor Principal and Manager-level AI engineers to raise technical maturity.

Tools

AWS Ultraclusters

Huggingface

VectorDBs

PyTorch

Job description

AI Engineer 5 (MLX)

At Capital One, we are creating responsible and reliable AI systems, changing banking for good. For years, Capital One has been an industry leader in using machine learning to create real-time, personalized customer experiences. Our investments in technology infrastructure and world-class talent — along with our deep experience in machine learning — position us to be at the forefront of enterprises leveraging AI. From informing customers about unusual charges to answering their questions in real time, our applications of AI & ML are bringing humanity and simplicity to banking. We are committed to continuing to build world‑class applied science and engineering teams to deliver our industry leading capabilities with breakthrough product experiences and scalable, high-performance AI infrastructure. At Capital One, you will help bring the transformative power of emerging AI capabilities to reimagine how we serve our customers and businesses who have come to love the products and services we build.

Team Description:

The Intelligent Foundations and Experiences (IFX) team is at the center of bringing our vision for AI at Capital One to life. We work hand-in-hand with our partners across the company to advance the state of the art in science and AI engineering, and we build and deploy proprietary solutions that are central to our business and deliver value to millions of customers. Our AI models and platforms empower teams across Capital One to enhance their products with the transformative power of AI, in responsible and scalable ways for the highest leverage impact.

What You’ll Do:

• Partner with a cross-functional team of engineers, research scientists, technical program managers, and product managers to deliver AI-powered products that change how our associates work and how our customers interact with Capital One.

• Design, develop, test, deploy, and support AI software components including foundation model training, large language model inference, agents and multi-agent workflows, similarity search, guardrails, model evaluation, experimentation, governance, and observability, etc.

• Leverage a broad stack of Open Source and SaaS AI technologies such as AWS Ultraclusters, Huggingface, VectorDBs, PyTorch, and more.

• Invent and introduce state-of-the-art foundation model optimization techniques to improve the performance - scalability, cost, latency, throughput - of large scale production AI systems.

• Contribute to the technical vision and the long term roadmap of foundational AI systems at Capital One.

• Design, implement and optimize multi-model orchestration pipelines - integrating LLMs, vector search, and domain-specific models into unified systems

• Establish and lead cost-performance governance reviews across AI systems, tracking GPU utilization, model throughput, and inference cost efficiency

• Lead team design councils or design review boards to ensure technical consistency and compliance with AI engineering standards

• Mentor Principal and Manager-level AI engineers, fostering cross-domain learning and elevating organizational technical maturity

The Ideal Candidate:

• You love to build systems, take pride in the quality of your work, and also share our passion to do the right thing. You want to work on problems that will help change banking for good

• Passion for staying abreast of the latest research, and an ability to intuitively understand scientific publications and judiciously apply novel techniques in production

• You adapt quickly and thrive on bringing clarity to big, undefined problems. You love asking questions and digging deep to uncover the root of problems and can articulate your findings concisely with clarity. You have the courage to share new ideas even when they are unproven