Principal Data Scientist

Fidelity Investments

TX, Westlake

This job has been expired

Job Description

The Purpose of Your Role

Fidelity Workplace Investing is seeking a Data Scientist to support initiatives around personalization and customization. This position will work with technical professionals in engineering and with managers of market research and product development teams. The assignments may include exploratory analysis, feature engineering, experimentation forecasting, numerical optimization, and real time scoring.

As Data Scientists, we support projects across many areas and ensure the highest degree of quality. You must be a great teammate who thrives in a small, highly effective work environment and communicates with confidence to all levels of Workplace Investing. The ideal Data Scientist handles projects from start to finish. i.e., they can work with web site professionals on experimental design, gather required data in any shape and size, process it into useful features, train machine learning models, and assist technical teams to move models into production and measure business results.

The Skills You Bring

  • Statistical and data science programming with proficiency in Python or R. Experience writing testable, modular code a plus.
  • Expert in training regression and classification models using typical ML algorithms, creating model documentation, and explaining model output (such as features and performance) to non-data science audiences.
  • Able to conduct technical reviews of data science projects and mentor junior data scientists.
  • Data extraction and feature engineering for processing and transforming data into relevant features.
  • Committed to continuous learning and able to pick up new knowledge quickly.
  • Working knowledge of AI Ethics considerations and AI bias detection techniques a plus.
  • Experience in real-time scoring, reinforcement learning, and multi-armed bandit models a plus.


  • PhD or Master’s Degree in a quantitative field (e.g. Statistics, Data Science or Applied Mathematics), with applied research experience.
  • PhD in an applied research field with quantitative research experience.

How Your Work Impacts The Organization

Data Scientists in Fidelity Workplace Investments use sophisticated machine learning and optimization to deliver personalized experiences to our customers. Your work will help participants learn how to plan for their financial future and prepare for impending life changes.

Company Overview

At Fidelity, we are passionate about making our financial expertise broadly accessible and effective in helping people live the lives they want! We are a privately held company that places a high degree of value in creating and nurturing a work environment that attracts the best talent and reflects our commitment to our associates. We are proud of our diverse and inclusive workplace where we respect and value our associate for their unique perspectives and experiences. For information about working at Fidelity, visit Fidelity Investments is an equal opportunity employer.

Accommodation Language

To Initiate a Request For An Accommodation Please Contact The Following

Fidelity will reasonably accommodate applicants with disabilities who need adjustments to participate in the application or interview process.

For roles based in the US: Contact the HR Leave of Absence/Accommodation Team by sending an email to, or by calling 800-835-5099, prompt 2, option 2

For roles based in Germany: Contact

For roles based in Ireland: Contact


Company Overview

Fidelity Investments is a privately held company with a mission to strengthen the financial well-being of our clients. We help people invest and plan for their future. We assist companies and non-profit organizations in delivering benefits to their employees. And we provide institutions and independent advisors with investment and technology solutions to help invest their own clients’ money.

Join Us

At Fidelity, you’ll find endless opportunities to build a meaningful career that positively impacts peoples’ lives, including yours. You can take advantage of flexible benefits that support you through every stage of your career, empowering you to thrive at work and at home. Honored with a Glassdoor Employees’ Choice Award, we have been recognized by our employees as a Best Place to Work in 2022. And you don’t need a finance background to succeed at Fidelity—we offer a range of opportunities for learning so you can build the career you’ve always imagined.

Many of our associates are continuing to work remotely temporarily due to COVID-19. When Fidelity employees eventually return to the office, our goal is for most people to work flexibly in a way that balances both personal and business needs with time onsite and offsite through what we’re calling “Dynamic Working.”

We invite you to Find Your Fidelity at

Fidelity Investments is an equal opportunity employer. We believe that the most effective way to attract, develop and retain a diverse workforce is to build an enduring culture of inclusion and belonging.

Fidelity will reasonably accommodate applicants with disabilities who need adjustments to participate in the application or interview process. To initiate a request for an accommodation, contact the HR Leave of Absence/Accommodation Team by sending an email to accommodations, or by calling 800-835-5099, prompt 2, option 3.