Our client is seeking an experienced Full Stack Quality Engineer (QE) to join an Agile delivery team supporting the development and enhancement of customer-facing digital applications.

The successful candidate will be responsible for end-to-end quality engineering across the technology stack, including mobile UI, APIs, data flows, and database validation .

This role requires strong hands-on automation experience and the ability to leverage AI-enabled development and testing tools to accelerate test creation, execution, troubleshooting, and overall quality assurance.

Work Mode : % on site Location: Downtown Toronto Contract Duration: 12 months Start Date: October Key Responsibilities Design, develop, maintain, and execute automated tests for mobile applications, APIs, and backend services .

Perform end-to-end testing across mobile UI, APIs, data flows, and databases .

Build and maintain mobile automation frameworks using tools such as Appium, Maestro, and browser-based automation technologies .

Develop and execute API automation tests to validate functionality, integrations, and data exchanges.

Write and execute database queries to perform data validation and reconciliation .

Validate data flows across frontend, API, backend, and database layers.

Leverage AI tools extensively throughout the testing lifecycle , including test-case creation, automation development, execution, analysis, and troubleshooting.

Identify, document,



investigate, and track defects through resolution.

Collaborate closely with developers, product owners, designers, and other QE resources within Agile squads .

Participate in sprint planning, refinement, daily stand-ups, reviews, and retrospectives.

Contribute to continuous improvement of automation frameworks, testing practices, and overall product quality.

Must Haves Strong hands-on experience as a Quality Engineer, QA Automation Engineer, or Software Development Engineer in Test (SDET) .

Demonstrated experience testing across the full application stack , including mobile UI, APIs, data flows, and databases.

Solid mobile automation experience using Appium, Maestro, browser automation tools, or similar technologies .

Strong experience developing and executing API automation tests .

Proficiency writing SQL/database queries for testing and data validation.

Experience validating complex data flows and integrations between application layers.

Advanced comfort using AI-enabled tools for software testing, test creation, automation, execution, and troubleshooting .

Experience working within Agile/Scrum delivery teams and collaborating directly with client development teams.

Strong analytical, troubleshooting, and problem-solving skills.

Ability to work independently and take ownership of assigned testing activities.

📌 Senior Full Stack Quality Engineer (QE) to join an Agile delivery team supporting the development and enhancement of customer-facing digital applications. (Toronto)
🏢 S.i. Systems
📍 Toronto