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Fidelity Investments

Manages investments and workplace retirement plans

Principal AI/ML Engineer

Applied Machine LearningPosted on Nov 5
Full-timeWestlake, TX, USANo salary listed

About the Job

Requirements

  • A bachelor's or master's degree, or equivalent experience, in Computer Science, Engineering, Data Science, or a related field.
  • At least 6 years of software or AI/ML engineering experience, including building and deploying AI solutions in production environments.
  • Practical experience with large language models, prompt and context engineering, retrieval-augmented generation architectures, and agentic AI frameworks.
  • Advanced proficiency in Python and experience building clean, maintainable, well-tested production applications.
  • Strong experience designing APIs and integrating AI capabilities with enterprise applications, data platforms, and business workflows.
  • Experience deploying cloud-native AI solutions and applying monitoring, observability, governance, and MLOps practices.
  • Experience with AWS, Snowflake, dbt, Airflow, LangChain/LangGraph, or similar technologies.
  • Ability to balance innovation with practicality and deliver scalable solutions that drive business outcomes.

Responsibilities

  • Develop and implement production AI and machine learning solutions using large language models, retrieval-augmented generation, and agentic AI frameworks.
  • Develop scalable data foundations, APIs, and cloud-based AI infrastructure.
  • Build reliable, secure, and observable systems.
  • Partner with business and technology teams to translate complex challenges into impactful solutions.
  • Establish monitoring, governance, and MLOps methods to ensure performance and scalability.
  • Evaluate emerging technologies and apply them to deliver measurable outcomes.

Desired Qualifications

  • Production-first attitude focused on reliability, scalability, maintainability, and user experience.
  • Ability to assess technical decisions through the lens of business impact, operational complexity, and long-term sustainability.
  • Proven success collaborating across technical and non-technical teams in fast-paced environments.

About the Company

Fidelity Investments

Manages investments and workplace retirement plans

Fidelity Investments manages money and runs brokerage accounts for individuals, while administering workplace benefits and supporting financial advisers and institutions. Its funds span active management and index investing, and its advice services range from automated portfolios to dedicated wealth managers. Customers trade through online accounts or work with advisers by phone and at investor centers, while employers use its services for retirement savings and stock plans. The business earns advisory fees and charges for selected trades, with institutional custody and clearing services alongside its consumer accounts. Fidelity was founded in 1946 and is headquartered in Boston, Massachusetts, United States.

Company size
10,001+
Company stage
Debt Financing
Total funding
$249.6B
Headquarters
Boston, MA
Founded
1946

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