Staff Data Scientist

Toast

Staff Data Scientist leading design and development of scalable ML systems at Toast. Collaborating across teams to drive measurable business outcomes and enhance customer experience.

Posted 7/8/2026full-timeRemote • California • 🇺🇸 United StatesLead💰 $170,000 - $272,000 per yearWebsite

Tech Stack

Tools & technologies

AWSCloudDynamoDBPythonPyTorchScikit-LearnSQLTensorflow

About the role

Key responsibilities & impact

Own the full machine learning lifecycle—from problem framing and data exploration to modeling, deployment, and monitoring—for mission-critical initiatives.
Design and implement advanced ML and statistical models that improve product performance, operational efficiency, or customer insights.
Collaborate with engineers, product managers, and business stakeholders to define project scope, success metrics, and integration strategy.
Guide architectural decisions, set modeling standards, and champion best practices for experimentation, validation, and productionization.
Mentor other data scientists and raise the technical bar through design reviews, feedback, and sharing domain expertise.
Proactively identify areas where data science can create business value and lead cross-functional efforts to drive those opportunities forward.
Leverage cutting edge AI tools to enhance your development workflow, improve velocity, and help pioneer new approaches to building - contributing to a culture of innovation and productivity across the team.

Requirements

What you’ll need

5+ years of experience in data science with a proven track record of delivering production ML systems that drive measurable impact.
Deep knowledge of statistical modeling, machine learning (e.g., tree-based models, time series, deep learning), and model evaluation.
Experience working with real-world product data at scale and translating ambiguous problems into well-scoped ML solutions.
Experience with distributed data processing and training, real-time inference, and ML Ops frameworks
Prior experience mentoring other data scientists or acting as a tech lead.
Experience leading experimentation (e.g., A/B testing), causal inference, and real-time decision systems.
Proficiency in Python and SQL, and experience with ML frameworks (e.g., scikit-learn, PyTorch, TensorFlow).
Strong grasp of software engineering principles including modular design, version control, testing, and CI/CD.
Hands-on experience with cloud platforms (preferably AWS), including tools like SageMaker, Athena, Glue, DynamoDB, and Bedrock.
Excellent communication skills and the ability to influence both technical and non-technical stakeholders.
Strong business acumen with the ability to align technical solutions with company goals.

Benefits

Comp & perks

health insurance
retirement plans
paid time off
flexible work arrangements
professional development
bonuses
stock options
equipment allowances
wellness programs

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

Machine LearningStatistical ModelingModel EvaluationA/B TestingCausal InferenceReal-Time Decision SystemsDistributed Data ProcessingML Ops FrameworksDeep LearningTree-Based Models

Soft Skills

Excellent CommunicationInfluencing StakeholdersBusiness Acumen