# Lead Software Engineer (SDET) at Mastercard

Mastercard is hiring a Lead Software Engineer (SDET) in Toronto, Canada. Level rates it Little AI ●○○○; you can [apply on Mastercard](https://jobsbylevel.com/go/08fdc930-4760-41d7-8b9b-dfe50bee8047?utm_medium=ai-agent).

AI Level 1, AI centrality 0 out of 100. Toronto, Canada (Ethoca).

## Details

- Company: [Mastercard](https://jobsbylevel.com/companies/mastercard)
- AI level: AI Level 1 (score 0 out of 100)
- Location: Toronto, Canada (Ethoca)
- Posted: August 21, 2026
- Apply: https://jobsbylevel.com/go/08fdc930-4760-41d7-8b9b-dfe50bee8047?utm_medium=ai-agent
- Free CV review for this job: https://jobsbylevel.com/cv-review?job=lead-software-engineer-sdet-at-mastercard-f91af2

## Prepare for this job

The job page lists 5 likely interview questions for this offer, with a CV checklist: https://jobsbylevel.com/jobs/lead-software-engineer-sdet-at-mastercard-f91af2

## 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 Lead Software Engineer (SDET) Who is Mastercard? Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial institutions, governments, and businesses realize their greatest potential. Ethoca is a Mastercard business unit where you can join a team of top business and technology innovators who are changing the payments landscape and reinventing the way global merchants and issuers combat fraud and reduce costs. Our services allow customers to focus on what really matters - increasing sales and creating a great customer experience. Our relentless customer focus is what makes us an award-winning company. We believe that when people come together, it unlocks potential. Our collaborative environment enables our teams to deliver and develop solutions that provide safety, security and convenience for our customers. Ethoca is a place where risk-takers thrive, change makers excel, and innovators shape a better tomorrow. Innovation requires taking thoughtful risks and moving with speed and agility, so that’s what we do. We invite our employees to bring their hearts, minds and whole selves to work every day to push boundaries and dream up new possibilities. Let’s create new possibilities together. Overview To support our continued growth and success, we are scaling our platform and building new products. Ethoca’s growth is explosive, and only great problem-solvers, collaborators and thinkers can help us take it to the next level. If that sounds like you then keep reading! We believe in decoupled, message-driven, and distributed systems. We strive to keep codebases small and manageable. We’re interested in reactive design patterns that will make our systems more resilient and responsive, yet remain elastic to change. As we proceed through our technology roadmap, we are evaluating and implementing new community endorsed technologies for every tier of our platform. Our backend tiers are presently JVM-based. We are using or considering technologies like Kafka, Springboot, Angular, Bootstrap, Chef, Nomad, Docker and so on. We are recruiting a Lead Software Engineer In Test who has a proven record of leading and solutioning full automation testing strategies and lifecycles for microservice-oriented Cloud-based systems using the appropriate industry leading products, patterns, and practices. Role • Work as a member of an agile team to design, build, test, and deploy new products and features • Lead Testing strategies and efforts inside and across teams and software components • Design and implement test frameworks reusable across multiple components in on-prem and cloud environments • Create test plans to achieve the best test approach in collaboration with team members • Create comprehensive and well-structured test cases for all test types in scope • Independently design and implement modularized, data driven, reusable automated tests • Troubleshoot defects to resolution and closure • Support the release process by executing and maintaining test suites for smoke, sanity, regression and operational validation. • Conduct reviews of test case coverage for any test types in scope to ensure appropriate risk-based testing approach is achieved. •

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