# Sr. Data Scientist

**Company**: Visa
**Location**: Toronto
**Work arrangement**: hybrid
**Experience**: senior
**Job type**: full-time
**Category**: Data Science
**Industry**: Finance

**Apply**: https://visa.wd5.myworkdayjobs.com/en-US/Visa/job/CA---Toronto-Canada/Senior-Data-Scientist_REF088874W?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_817dae22-6d8

## Description

We are seeking a Sr. Data Scientist to design and deploy AI-powered tools and agent systems that combine LLMs and custom ML models into end-to-end solutions supporting business decision-making.

The ideal candidate will have experience building and deploying machine learning models to production, focusing on modular, scalable, and maintainable models.

**Key Responsibilities:**

- Design AI agent systems that automate analytical workflows, including data retrieval, impact analysis, and proactive recommendation generation.

- Decide how to combine LLMs, traditional ML models, and rule-based logic into reliable, end-to-end agent workflows, and build the orchestration layer that ties them together.

- Take agent prototypes from proof-of-concept through iteration to production-grade systems with proper documentation, testing, CI/CD, and deployment ownership.

- Build and maintain forecasting models and other predictive tools that feed into agent systems or support business decisions directly.

- Monitor and maintain recurring data processes, ensuring pipelines run on time and data quality stays high.

- Contribute to modernizing the data stack by migrating pipelines, expanding data coverage, and supporting cloud migration efforts.

- Work with teammates across regions, product, and engineering, translating model and agent outputs into clear recommendations for senior business stakeholders.

**Requirements:**

- 5 or more years of relevant work experience with a Bachelor's Degree or at least 2 years of work experience with an Advanced degree.

- Experience building and deploying machine learning models to production.

- Hands-on experience with LLMs or generative AI.

- Comfortable building data pipelines and working with large-scale data using tools like Spark, Airflow, SQL, or Python.

- Experience managing data science or ML projects from scoping through delivery.

- Able to communicate technical work clearly to non-technical audiences.

**Preferred Qualifications:**

- 6 or more years of work experience with a Bachelor's Degree or 4 or more years of relevant experience with an Advanced Degree.

- Experience building AI agents or multi-model orchestration systems.

- Experience with predictive modeling and time-series forecasting.

- Experience with productionalizing agentic applications.

- Hands-on experience with cloud platforms.

- Exposure to financial services or the payments industry is a plus.

- Experience working across geographies and time zones in a global organization.

Visa requires at least 3 days in office, expectations of these days will be confirmed by your Hiring Manager.

## Skills

### Required
- LLMs
- machine learning
- data pipelines
- predictive modeling
- data infrastructure
- cloud platforms
- Python
- SQL
- Spark
- Airflow

### Nice to have
- AI agents
- multi-model orchestration systems
- time-series forecasting
- agentic applications
- financial services
- payments industry

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Source: [Apply at visa.wd5.myworkdayjobs.com](https://visa.wd5.myworkdayjobs.com/en-US/Visa/job/CA---Toronto-Canada/Senior-Data-Scientist_REF088874W?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)