Senior Mainframe Developer Jobs in Whitby, ON (NOW HIRING)

Requisition ID: 255249 
Join a purpose driven winning team, committed to results, in an inclusive and high-performing culture.

Scotiabank continues to be an industry leader for Payment's technology and innovation. We have a history of safely leveraging new tools to enable new experiences for our customers, focusing on ensuring we protect their interests and goals. The result of this leads to modernization programs which aim to offer enriched information and transparencies to support the rapidly evolving payments community.

Purpose

As a Data Quality Engineer within the Cards Engineering team, you will lead and coordinate quality assurance efforts for small to large-scale initiatives across multiple delivery channels and platforms. Operating within an Agile delivery model, you will champion system reliability, drive automation-first testing strategies, and ensure that quality is embedded throughout the software development lifecycle. You will assess the risk and impact of changes across a portfolio of over 190 banking applications and processes supporting the domestic bank network.

Reporting to the Senior Manager QA, you will collaborate with cross-functional squads(teams), including developers, product owners, and analysts, to deliver secure, scalable, and high-performing solutions

What You'll Do:

• Leads and drives a customer focused culture throughout their team to deepen client relationships and leverage broader Bank relationships, systems and knowledge.
• Understand how the Bank risk appetite and risk culture should be considered in day-to-day activities and decisions.
• Lead QA planning and execution across Agile squads, ensuring alignment with sprint goals and release timelines.
• Design, develop, and execute data quality validation for ETL pipelines across relational and big data platforms.
• Validate source-to-target mappings, transformation logic, and business rules.
• Perform SQL-based data analysis and reconciliation using DB2, Hive, and related data stores.
• Develop and maintain Python-based data quality frameworks, validation scripts, and automation.
• Identify, analyze, and report data quality issues, perform root cause analysis, and collaborate on fixes.
• Support IST, UAT & regression testing for data releases.
• Create and maintain test plans, test cases, execution evidence, and defect documentation (e.g., JIRA, Confluence).
• Ensure compliance with data governance, control, and audit requirements, especially for financial data.
• Collaborate with data engineers, business analysts, and stakeholders to clarify data requirements and quality expectations.
• Implement sampling and fullpopulation validation techniques for large datasets, including hashbased and aggregate reconciliations, CDC verification, and idempotency checks.
• Collaborate with external service providers to coordinate code delivery and environment readiness.
• Conduct risk-based testing to assess the impact of changes across interconnected systems and platforms.
• Drive defect triage and resolution in collaboration with development teams, escalating critical issues and recommending release readiness.
• Continuously evaluate and improve QA processes, contributing to the evolution of Quality Engineering practices within the Agile delivery model. This by continuously assessing and improving testing frameworks, tools, and practices to increase test coverage and reduce manual effort.
• Maintain deep-domain knowledge of Credit Card and Debit Card systems, their integrations, and business workflows.

What You'll Bring:

Education:

• • Bachelor's degree in computer science, Engineering, Information Technology, or a related field. (Preferred)
  • Certifications (Preferred): ISTQB Certified Tester, Certified Agile Tester (CAT), Certified ScrumMaster (CSM) or equivalent Agile certification, Automation Tool Certifications (e.g., Selenium, UFT)

Work Experience:

• • Banking Systems Knowledge: Advance understanding of functional operation of banking applications and interfaces, including Credit Card and Debit Card systems.

QA Experience

• Platforms & Big Data: EDL, HDFS/Hive, distributed processing (Spark)
• SQL/ETL: complex pipeline validation across sources/targets
• Automation: Python & PySpark for scalable frameworks
• Data Quality: validation, reconciliation, anomaly detection, referential integrity; rules & scorecards
• Mainframe/Legacy (nice to have): COBOL/EBCDIC exposure
• Ways of working: Jira/Confluence; CI/CD (Azure DevOps/Jenkins); Agile collaboration
• Defect Analysis & Reliability Testing: Skilled in fault diagnosis, root cause analysis to ensure system reliability and resilience. Proficient in risk-based testing and impact analysis across complex, integrated systems.

Core Competencies

• Leadership & Collaboration: Proven ability to lead and coordinate cross-functional QA teams, including testers, developers, and project managers, toward shared quality goals.
• Strategic Thinking: Full awareness of current and future initiatives across Domestic Banking and Alternate Delivery Channels, enabling proactive QA planning and risk mitigation.
• Agile Delivery Expertise: Deep understanding of Agile methodologies (Scrum, Kanban) and the ability to adapt quickly to changing priorities and evolving business needs.
• Communication & Stakeholder Management: Strong interpersonal and communication skills to manage diverse stakeholders, resolve conflicts, and align on testing objectives.
• Continuous Learning: Commitment to staying current with emerging QA tools, Agile practices, and financial technologies.

Working Conditions

Work in a standard office-based environment.

Interested?

If your experience is closely related but doesn't align perfectly with every qualification, we do encourage you to apply - you might be the right candidate for this or other roles at Scotiabank!

At Scotiabank, every employee is empowered to reach their fullest potential, respected for who they are and, embraced for their differences. That's why we work to grow and diversify talent and engage employees in a performance-oriented culture.

What's in it for you?

• Diversity, Equity, Inclusion & Allyship - We strive to create an inclusive culture where every employee is empowered to reach their fullest potential, respected for who they are, and are embraced through bias-free practices and inclusive values across Scotiabank. We embrace diversity and provide opportunities for all employee to learn, grow & participate through our various Employee Resource Groups (ERGs) that span across diverse gender identities, ethnicity, race, age, ability & veterans.
• Accessibility and Workplace Accommodations - We value the unique skills and experiences each individual brings to the Bank and are committed to creating and maintaining an inclusive and accessible environment for everyone. Scotiabank continues to locate, remove, and prevent barriers so that we can build a diverse and inclusive environment while meeting accessibility requirements.
• Upskilling through online courses, cross-functional development opportunities, and tuition assistance.
• Competitive Rewards program including bonus, flexible vacation, personal, sick days, and benefits will start on day one.
• Community Engagement - no matter where you choose to work from; we offer opportunities for community engagement & belonging with our various programs.

Location(s):  Canada : Ontario : Toronto 
Scotiabank is a leading bank in the Americas. Guided by our purpose: "for every future", we help our customers, their families and their communities achieve success through a broad range of advice, products and services, including personal and commercial banking, wealth management and private banking, corporate and investment banking, and capital markets.  
At Scotiabank, we value the unique skills and experiences each individual brings to the Bank, and are committed to creating and maintaining an inclusive and accessible environment for everyone. If you require accommodation (including, but not limited to, an accessible interview site, alternate format documents, ASL Interpreter, or Assistive Technology) during the recruitment and selection process, please let our  Recruitment team know. If you require technical assistance, please click here. Candidates must apply directly online to be considered for this role. We thank all applicants for their interest in a career at Scotiabank; however, only those candidates who are selected for an interview will be contacted.