Senior Data Scientist I
- Toronto, ON
- Permanent
- Temps-plein
- Lead the end-to-end lifecycle of complex data science projects, from ideation to production monitoring.
- Design and train predictive models, including deep learning models, to optimize key business outcomes and address challenges.
- Engineer impactful features and build robust, automated data pipelines to support model training and inference.
- Rigorously analyze model performance and systematically fine-tune models to maximize business metrics.
- Build and deploy scalable, low-latency, production-grade applications to serve models in a production cloud environment.
- Use a production-first mindset to consult on project feasibility and help shape technical strategy, balancing performance, time, and cost.
- Actively partner with Product and Engineering teams to influence product design and align on solution feasibility.
- Design and validate new processes, products, and advanced ML techniques through experimentation and testing.
- Analyze large structured and unstructured datasets to identify insights and propose strategies to address complex technical challenges.
- Communicate complex findings and strategic recommendations to technical and non-technical audiences concisely and effectively.
- Proactively engage with team members to accomplish individual and groups goals, providing technical leadership and mentorship to other data scientists.
- Continuously seek new opportunities to develop and apply new skills towards the improvement of data science processes and technical methodologies.
- Establish comprehensive monitoring for model performance and data drift, using insights to drive continuous improvement.
- Document complex model architectures, deployment processes, and data pipelines to ensure maintainability.
- Bachelor’s degree in a discipline such as Computer Science, Data Science, Engineering, Applied Math, or a related field.
- 5+ years of relevant work experience in a data science, machine learning, or analytics role with demonstrated history of project ownership and delivery
- Proven experience in designing, building, and deploying machine learning models into production environments with measurable impact
- Extensive experience working in a cloud environment (GCP is preferred, but cloud skills are transferable).
- Expert proficiency in SQL and Python, with strong ability to write clean, efficient, and reusable code for both model training and application development
- Expertise in a wide range of machine learning algorithms, statistical methods, and deep learning frameworks (e.g. scikit-learn, Keras, TensorFlow, PyTorch).
- Experience building Python-based applications to serve model predictions for online inference.
- Experience applying Natural Language Processing techniques to build solutions using unstructured data.
- Expertise with using Git in a collaborative team environment.
- Proven ability to perform statistical analysis to validate model performance and business impact.
- Strong communication and presentation skills, with the ability to convey complex technical concepts to both technical and non-technical audiences.
- Demonstrated experience leading technical projects and mentoring team members.
- Master’s or Ph.D. in a discipline such as Computer Science, Data Science, Engineering, Applied Math, or a related field.
- Professional certification in cloud-based data platforms and services (e.g. GCP Professional Machine Learning Engineer).
- In-depth knowledge of ML Ops principles and familiarity with associated methods/tools.
- Demonstrated experience building ML models for matching, ranking, or recommendation systems.
Job Status: Regular - Full Time
Job Location: Canada : Ontario : Toronto || Canada : Ontario : Mississauga
Work Arrangement: Hybrid
Application Deadline: 05/01/2026For work arrangements that are ‘Hybrid’, successful candidates must be based in Canada and report to a set Bell office for a minimum of 3 days a week. Recognizing the importance of work-life balance, Bell offers flexibility in work hours based on the business needs.Please apply directly online to be considered for this role. Applications through email will not be accepted.We know that caring for our team members is at the heart of a healthy, positive and thriving workplace. As part of our team, you’ll enjoy a comprehensive compensation package that includes a competitive salary and a wide range of benefits to support the well-being of you and your family. As soon as you join us, you'll be eligible for medical, dental, vision and mental health benefits that you can tailor to your specific needs. Plus, as a Bell team member, you'll enjoy a 35% discount on our services and access exclusive offers from our partners.At Bell, we are proud of our focus on fostering an inclusive and accessible workplace where all team members feel valued, respected, supported, and that they belong.Bell is committed to clarity in our hiring process. All roles posted are opportunities we’re actively recruiting for, unless stated otherwise. We also want to make sure that everyone has an equal opportunity to join our team. We encourage individuals who may require accommodations during the hiring process to let us know. For a confidential inquiry, email your recruiter or to make arrangements.If you have questions or feedback regarding accessibility at Bell, we invite you to complete the or visit our for other ways to contact us.Artificial intelligence may be used to assess parts of your application. Please review our privacy policy ( ) to learn more about how we collect, use, and disclose your personal information.Created: Canada, ON, TorontoBell, one of