Senior AI Engineer

1 week ago

Toronto, Ontario, Canada Mastercard Full time $90,000 - $120,000 per year

Our Purpose

Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we're helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential.

Title and Summary

Senior AI EngineerAbout Mastercard
Mastercard is a global technology company in the payments industry, connecting billions of consumers, financial institutions, merchants, governments, and businesses worldwide. We are driving the future of commerce by enabling secure, simple, and smart transactions. Artificial Intelligence is at the core of our strategy to make Mastercard stronger and commerce safer, smarter and more personal.

The Role:
At Mastercard, we're building next-generation AI-powered platforms to drive innovation and impact. As a Senior AI Engineer, you'll work with cutting-edge tools, large language models (LLMs), and emerging frameworks to develop intelligent systems. You'll collaborate with senior engineers, data scientists, and product teams—gaining hands-on experience while contributing to real-world AI solutions.
You'll help implement Agentic AI systems, develop backend services, and explore new AI capabilities. Your focus will include prompt engineering, guardrail design, and experimentation to ensure safe, scalable, and effective AI applications.

Key Responsibilities

•  Develop and enhance AI agents and backend systems for Mastercard's AI platform

•  Evaluate LLMs and emerging technologies to identify innovation opportunities

•  Design and optimize prompts for LLMs

•  Implement safeguards to ensure secure, ethical AI responses

•  Build APIs, microservices, and data integrations for AI features

•  Write clean, maintainable code following industry best practices

•  Stay current with advancements in AI and software engineering

All About You:

•  Strong understanding of AI/ML concepts and enthusiasm for generative AI

•  Experience with Python and backend frameworks (e.g., FastAPI, Flask, )

•  Knowledge of REST APIs and cloud platforms (AWS, Azure, GCP)

•  Strong analytical skills and curiosity for exploring new AI capabilities

•  Collaborative mindset and openness to feedback and mentorship

•  Interest in prompt engineering, AI safety, and scalable deployment

Why Join Us?
At Mastercard, you'll help shape the future of AI in global commerce—solving complex challenges at scale, driving financial inclusion, and reinforcing the trust and security that define our brand. You'll work with world-class talent, cutting-edge technologies, and will make a lasting impact.

#AI1Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.

Corporate Security Responsibility


All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

  • Abide by Mastercard's security policies and practices;

  • Ensure the confidentiality and integrity of the information being accessed;

  • Report any suspected information security violation or breach, and

  • Complete all periodic mandatory security trainings in accordance with Mastercard's guidelines.

  • Senior AI Engineer

    7 days ago

    Toronto, Ontario, Canada Mastercard Full time US$125,000 - US$175,000 per year

    Job Title:Senior AI Engineer Overview:About MastercardMastercard is a global technology company in the payments industry, connecting billions of consumers, financial institutions, merchants, governments, and businesses worldwide. We are driving the future of commerce by enabling secure, simple, and smart transactions. Artificial Intelligence is at the core...

  • Senior Technical Program Manager II, Conversational AI

    2 weeks ago

    Toronto, Ontario, Canada SoundHound AI Full time $80,000 - $200,000 per year

    Your Career, our Future—Together.Ready to join something big? At SoundHound AI, we bring voice, generative, and conversational AI together to transform how people interact with products and services. From voice-enabled vehicles to food ordering and customer support, our multilingual, omnichannel technology already impacts hundreds of millions worldwide.The...

  • Agentic AI Platform Engineer

    7 days ago

    Toronto, Ontario, Canada KData AI Full time $120,000 - $180,000 per year

    Job Title: Agentic AI Platform EngineerClient: Banking ClientLocation:Downtown Toronto (On-site 4 days/week)Position Type:6-Month Contract (Renewable)Domain: Generative AI, Agentic Systems, AI Platform EngineeringRate: up to $90Role SummaryA leading Banking Client is building a next-generationAgentic AI Platformto enable scalable, enterprise-wide deployment...

  • Senior Machine Learning Engineer, Large Language Models

    2 weeks ago

    Toronto, Ontario, Canada SoundHound AI Full time $200,000 - $250,000 per year

    Your Career, our Future—Together.Ready to join something big? At SoundHound AI, we bring voice, generative, and conversational AI together to transform how people interact with products and services. From voice-enabled vehicles to food ordering and customer support, our multilingual, omnichannel technology already impacts hundreds of millions worldwide.The...

  • Senior AI Engineer

    5 days ago

    Toronto, Ontario, Canada Vetster Full time $120,000 - $180,000 per year

    Senior AI EngineerVetster ) is the world's fastest-growing veterinary telehealth and pet care marketplace. Since our launch in 2020, we have established ourselves as a leader in the rapidly growing pet care industry. Named Pet App of the Year, Vetster makes it easier for pet owners to connect with the veterinary care they need - anytime, anywhere,We know...

  • Senior Generative AI Engineer

    7 days ago

    Toronto, Ontario, Canada Alexa Translations Full time $200,000 - $250,000 per year

    About Alexa Translations Alexa Translations provides translation services in the legal, financial, and securities sectors by leveraging proprietary A.I. technology and a team of highly specialized linguistic experts. Unmatched in speed and quality, our machine translation engine is best-in-class and specifically trained for the French-Canadian market. If...

  • Senior Cloud and DevOps Engineer

    1 week ago

    Toronto, Ontario, Canada Menten AI, Inc. Full time $120,000 - $180,000 per year

    About Menten AI Menten AI is revolutionizing drug discovery by harnessing the power of generative AI to design cyclic peptide therapeutics. Our innovative platform targets challenging drug targets that lie beyond the reach of traditional small molecules and biologics. By creating potent macrocycles with optimal drug properties, including oral...

  • Senior AI Engineer

    3 days ago

    Toronto, Ontario, Canada BMO Full time $104,000 - $154,800 per year

    This is hybrid role is based out of Toronto that reports into the Senior Technology Officer. As an AI/ML Engineer, you will be part of the AI pod supporting the design and development of business-to-consumer (B2C) applications leveraging AI at BMO. You will lead initiatives to develop, test, deploy and maintain AI/ML models in BMO's cloud environments...

  • Senior Applied AI Engineer

    2 weeks ago

    Toronto, Ontario, Canada BMO Full time $103,000 - $192,000 per year

    Role OverviewSenior Applied AI Engineer – Role DescriptionThe Senior Applied AI Engineer is responsible for designing, developing, and deploying advanced Gen AI and machine learning solutions that drive business value in wealth management. This role blends deep technical expertise with financial domain knowledge, collaborating with cross-functional teams...

  • Senior AI Engineer

    3 days ago

    Toronto, Ontario, Canada BMO Full time $82,800 - $154,800

    Application Deadline:11/29/2025Address:33 Dundas Street West Job Family Group:Data Analytics & ReportingThis is hybrid role is based out of Toronto that reports into the Senior Technology Officer.  As an AI/ML Engineer, you will be part of the AI pod supporting the design and development of business-to-consumer (B2C) applications leveraging AI at BMO....