Principal Data Scientist

Full time

Employment Information

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T-Mobile is synonymous with innovation–and you could be part of the team that disrupted an entire industry! We reinvented customer service, brought real 5G to the nation, and now we’re shaping the future of technology in wireless and beyond. Our work is as exciting as it is rewarding, so consider the career opportunity below as your invitation to grow with us, make big things happen with us, above all, #BEYOU with us. Together, we won’t stop!

The Principal Data Scientist is responsible for leading technical innovation within the data science team. The Principal Data Scientist collaborates with a multi-disciplinary team of technical and non-technical business stakeholders on a wide range of challenges and develops the next generation of advanced analytics and Machine Learning (ML) modeling products and solutions. The Principal Data Scientist is entrusted with developing the Artificial Intelligence (AI) that drives the most important aspects of the business. This position is at the forefront of new AI technologies and represents mastery of existing machine learning techniques. Paramount to this job is the understanding that a Principal Data Scientist is a forward-thinking individual contributor that helps define the long-term technical vision of the data science teams within T-Mobile.

Job Responsibilities:

  • Extract, prepare, and model large, complex data sets using a combination of skills, including machine learning theory, mathematics, statistics, and programming.
  • Identify critical and emerging technologies that will support and extend our consumer data, data integration, and quantitative analytic capabilities.
  • Lead the implementation, assessment and standardization of advanced analytics and modeling toolkits for our data science teams.
  • Partner with data engineering teams to shape data management strategies, architecture, governance, pipelines, and infrastructure enabling effective modeling environments for data science teams
  • Provide senior level guidance to the data science and measurement science teams on approach and methodologies
  • Communicate important information and insights to business leaders using verbal, written, and data visualization skills.


  • Bachelor’s Degree Quantitative Discipline (math, statistics, economics, computer science, physics, engineering) (Required)
  • Master’s/Advanced Degree Quantitative Discipline (math, statistics, economics, computer science, physics, engineering) (Preferred) Work Experience:
  • 7-10 years Industry experience in predictive modeling, data science, and analysis in an ML engineer or data scientist role building and deploying ML models or hands on experience developing deep learning models (Required)
  • 4-7 years’ Experience writing and speaking about technical concepts to business, technical, and lay audiences and giving data-driven presentations (Required)
  • 7-10 years’ Experience articulating and translating business questions and using statistical techniques to arrive at an answer using available data (Required)
  • 4-7 years’ Experience with statistical methods and advanced modeling techniques. For example- SVM, Random Forest, graph models, Bayesian inference, NLP, Computer Vision, neural networks (Required)
  • 4-7 years’ Experience with big data architecture and pipeline, Hadoop, Hive, Spark, Kafka, etc. (Required)
  • 7-10 years’ Experience with data scripting languages (e.g., SQL, Python, R) (Required)
  • 4-7 years’ Experience in data visualization (Required)
  • 7-10 years Extended experience working with relational database using SQL (Required)
  • 4-7 years’ Experience in telecom industry (Preferred)

Knowledge, Skills and Abilities:

  • Mathematics Calculus, linear algebra, statistics, and probability (Required)
  • Programming Mastery of Python and SQL (Required)
  • Machine Learning: Apply machine learning techniques including supervised and unsupervised learning; collaborative filtering; and artificial neural networks (Required)
  • Deep Learning: Research, design, implement, evaluate, and optimize novel algorithms/models in Deep Learning space (Required)
  • Communication Exemplary communication skills, ability to work with cross functional teams (Required)
  • At least 18 years of age
  • Legally authorized to work in the United States Travel:
  • Travel Required (Yes/No): No

Washington Pay Range : $157,700.00 – $213,400.00

The pay range above is the general base pay range for a successful candidate in the state listed. The successful candidate’s actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay may be above or below this range. At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and/or individual performance and which is set at a percentage of the employee’s eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance, while Retail and Business Sales roles are eligible for monthly or quarterly sales incentives. And since we are ALL owners, EVERY employee at T-Mobile is eligible for an Annual Stock Grant. For information about T-Mobile’s amazing benefits, check out


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