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Added 1 day ago
Principal Engineer (API Platform)
Xero
Remote, Canada
Full-time · Remote
As Principal Engineer for Platform API, you will define and drive the long-term technical vision for how Xero exposes its accounting capabilities to external partners (building on our…
Added 1 day ago
Principal AI Engineer
Royal Bank of Canada
Calgary, AB
Full-time
We are looking for a Principle AI Engineer to drive the development of Data engineering solutions on RBC’s Enterprise Data and AI Hybrid Multi-cloud Platforms, that meet the strategic data…
Added 2 days ago
Principal Sales Systems Engineer
Jobgether
Canada
Full-time
This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Principal Sales Systems Engineer based in Canada.
Added 2 days ago
Principal Software Engineer, Full-Stack Development
Zynga
Toronto, ON
$118,300 to $168,300 CAD / year
Come join the AI team at Zynga making an impact across all of the company's games - Central Technology! As a Principal Software Engineer, you will be responsible for the technical vision,…
Added 2 days ago
Senior Principal Software Engineer, R&D
Mastercard
Toronto, ON
Full-time
Senior Principal Software Engineer, R&DOverview
Added 2 days ago
Staff Software Engineer (Architecture)
Lantern
Vancouver, BC
Full-time
Lantern is seeking a Staff Software Engineer to join our expanding Architecture team. This is a strategic and highly visible role focused on driving architectural consistency, elevating…
Added 5 days ago
Principal AI Engineer
RBC
Calgary, AB
Full-time
We are looking for a Principle AI Engineer to drive the development of Data engineering solutions on RBC’s Enterprise Data and AI Hybrid Multi-cloud Platforms, that meet the strategic data…
Added 5 days ago
Développeur(-euse) principal(e) de logiciels (contenu) /Principal Software Development Engineer
Expedia Group
Montreal, QC · Canada - Quebec - Montreal
Full-time
Développeur(-euse) principal(e) de logiciels (contenu)
Added 5 days ago
Staff Software Engineer (Architecture)
Lantern
Vancouver, BC
Lantern is seeking a Staff Software Engineer to join our expanding Architecture team. This is a strategic and highly visible role focused on driving architectural consistency, elevating…
Added 6 days ago
Principal Data Engineer
Xplore Inc
Markham, ON
Full-time
Added 6 days ago
Senior Technical Architect II
Bell
Toronto, ON
Mentorship & Technical Guidance: Act as the principal subject matter expert, providing strong technical direction, architectural guidance and mentorship to engineers and architects on power…
Added 6 days ago
CTO | VC-backed AI | Relocate to Barcelona | €120–150k + equity
Ink
Toronto, ON
Full-time
Added 6 days ago
Principal Software Engineer / Architect – AI, CoCounsel FDE
Urban Ridge Supplies
Toronto, ON
Full-time
Are you a Principal-level software engineer who enjoys solving complex customer problems while remaining deeply hands-on with technology?
Added 6 days ago
LLM Engineer
Urban Ridge Supplies
Markham, ON
Full-time
…smarter, connected future for all. As a Qualcomm Machine Learning Engineer, you will create and implement machine learning techniques, frameworks, and tools that enable the efficient…
Added 7 days ago
Senior Data Engineer – Ingénieur des données
KPI Digital Solutions
Montreal, QC
Other
We are looking for a Data Engineer that combines Data Engineering, platform architecture and management expertise. The Data Engineer will:
Added 7 days ago
Senior Product Manager, PolicyCenter
Guidewire Software
Canada
Full-time
…and Billing, the Product Management Lead for Policy, and a Principal PM focused on AI/agentic capabilities - to deliver the next generation of policy administration for P&C…
Added 7 days ago
Principal AI/ML Engineer
Vanguard
Toronto, ON
Full-time
As a Principal AI Engineer, you will serve as a senior technical leader responsible for transforming state-of-the-art AI research into scalable, production-ready capabilities that create…
Added 7 days ago
Principal AI Cloud Engineer
BMO
Toronto, ON · FCP
Full-time
As a Principal AI & Cloud Engineer , you are a hands-on technical developer who designs, builds, and scales cloud-native AI solutions and products. You help set engineering standards,…
Added 7 days ago
Senior Data Engineer – Ingénieur des données
KPI Mining Solutions
Montréal-Ouest, QC
Full-time
We are looking for a Data Engineer that combines Data Engineering, platform architecture and management expertise. The Data Engineer will:
Added 8 days ago
Principal Engineer, Software Engineering / AI Engineer
Quantum Technology Recruiting Inc. (QTR)
Toronto, ON
$285,000 to $325,000 USD / year
Full-time
Position: Principal Engineer, Software Engineering / AI Engineer
Added 9 days ago
Principal Software Development Engineer - AI Platform
Workday
Vancouver, BC · Canada, BC, Vancouver
Full-time
As a Principal Software Development Engineer for Machine Learning, you will be a team leader, working closely with other engineers and ML researchers to build and deploy robust, scalable AI…
Added 9 days ago
Sr. Software Development Engineer / Principal, Software Development Engineer
Workday
Vancouver, BC · Canada, BC, Vancouver
Full-time
As either a Senior Software Development Engineer or a Principal Software Development Engineer on the AI Model Serving team, you will be a technical leader who helps shape the vision and…
Added 12 days ago
Principal Product Applications Engineer
LeadingEdge HR Solutions
Ottawa, ON
Full-time
Position Title: Principal Product Applications Engineer
Added 22 days ago
Principal Product Applications Engineer
Astera Labs
Vancouver, BC
Full-time
…that connects GPUs, CPUs, and accelerators at rack scale. As a Principal Product Applications Engineer on the Scorpio team, you will be the technical face of our switching portfolio to the…
Added 17 days ago
Senior Machine Learning Engineer –AI & Agentic Systems
Project X
Toronto, ON
Full-time
…the Model Context Protocol (MCP), and sits between Senior and Principal level. There are no direct reports for this…

Mastercard

Senior Principal Software Engineer, R&D

Toronto, ON, Canada

Job type: Full-time
Posting language: English
Posted: Sep 28, 2026

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Original job description

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 Principal Software Engineer, R&DOverview

Mastercard is looking for a Senior Principal Software Development Engineer to join the Mastercard Foundry Research and Development team in our Toronto location. In this role, you will establish the technical direction for complex, early-stage products, drive architecture decisions across teams, and bring innovative solutions to global markets at enterprise scale. The Senior Principal Software Engineer thrives on setting direction where product concepts are ambiguous, aligning engineering choices to commercial outcomes.
Our team is built on a foundation of research and development, mining innovation internally, innovating new product lines with emerging technology, managing new products from inception to market validation and engaging strategically with start-ups to shape the future of commerce with and for our customers. At Mastercard you will help define the future of commerce globally.
This team will have a diverse focus both in terms of geography and variety of technology challenges driving hard to bring innovative payment solutions and services to market.

As a Senior Principal Software Engineer on the R&D team, you will be at the forefront of the design of complex, large-scale new product concepts spanning Mastercard’s business units.

Responsibilities of the role include:

• Define highly scalable solution architectures for complex, early-stage product concepts across technology stacks, data platforms, and environments
• Establish engineering best practices that accelerate responsible use of AI across solution architecture and software delivery, including patterns for AI-assisted development, evaluation, observability, and production readiness
• Set technical direction for complex applications, interfaces, and integrations from concept through implementation, deployment, and release
• Set technical strategy and lead architecture implementation for Data Platforms in Foundry R&D, creating reusable patterns that can scale across products
• Influence technical direction across R&D, product, and technology teams, creating alignment on tradeoffs, delivery risks, and long-term platform choices
• Identify high-impact technical risks, make architecture decisions under uncertainty, and design experiments or prototypes to de-risk product concepts before market validation
• Act as a force multiplier for engineering excellence by coaching senior engineers, reviewing critical designs, raising quality standards, and creating technical practices that improve delivery
across teams

All About You
• Hands-on experience architecting and building 0-to-1 applications using Generative AI, LLMs, or agentic patterns
• Demonstrated ability to set technical strategy for complex initiatives, make architecture decisions under uncertainty, and influence senior technical and business stakeholders without direct authority
• Deep experience with one or more modern AI frameworks and SDKs for agent orchestration, AI application development, or coding-agent workflows, such as LangGraph, OpenAI Agents SDK, or Codex SDK
• Expertise in cloud platforms such as Databricks, Snowflake, AWS, and Azure
• Strong working knowledge of AI/ML, data analytics, and data product development with emphasis on data quality, data privacy, and localization
• Proven track record creating reusable architecture patterns, platforms, or engineering practices that accelerate delivery, reduce technical risk, or improve quality across an organization
• Uses AI to innovate on and improve individual and team engineering practices
• Expertise with Java, Spring Boot, React, Typescript, Postgres, and other object-oriented languages, front-end frameworks, and database technologies
• Strong business acumen and ability to apply technology to solve business problems
• Excellent verbal and written communication and cross-functional collaboration skills
• Proven track record raising the technical capability of senior engineers and teams through coaching, design review, standards-setting, and technical leadership
• Experience representing technical work through internal forums, external conferences, publications, open-source contributions, patents, or other thought leadership channelsMastercard 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 reasonable_accommodation@mastercard.com 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.

In line with Mastercard’s total compensation philosophy and assuming that the job will be performed in Canada, the successful candidate will be offered a competitive pay based on location, experience and other qualifications for the role and may be eligible to participate in a discretionary annual incentive program. This posting reflects one or more current openings on our team.

Pay Ranges

Toronto, Canada: $208,000 - $333,000 CAD

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More about this job

Responsibilities

Define highly scalable solution architectures for early-stage product concepts and establish engineering best practices for AI integration. Lead technical strategy across R&D teams while coaching senior engineers to ensure high-quality delivery and innovation.

Requirements

Requires extensive experience in architecting 0-to-1 applications using Generative AI and modern AI frameworks. Candidates must demonstrate strong technical leadership, expertise in cloud platforms, and proficiency in Java, React, and database technologies.

Skills

Generative AI
LLMs
Agentic patterns
Software architecture
Java
Spring Boot
React
Typescript
Postgres
Cloud platforms
Databricks
Snowflake
AWS
Azure
Data analytics
Technical leadership

Visa sponsorship

Not detected in the job text

Keywords

Software Engineering
R&D
Generative AI
LLMs
Agentic patterns
Java
Spring Boot
React
Typescript
Postgres
Databricks
Snowflake
AWS
Azure
Data platforms
Solution architecture
Product development
Technical strategy
Data privacy
Data quality
Cloud computing
Engineering excellence
Innovation
Payments
Commerce
Mentorship
System design
Scalability
Agile
API

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