Mainframe developer Jobs in Barrie, ON

Putting people first, every day

BDO is a firm built on a foundation of positive relationships with our people and our clients. Each day, our professionals provide exceptional service, helping clients with advice and insight they can trust. In turn, we offer an award-winning environment that fosters a with a high priority on your personal and professional growth.

Your Opportunity

BDO Canada is looking for a ServiceNow Senior Developer to join our growing team, with the ability to work from anywhere in Canada. This is a new role in the team.

The Senior ServiceNow Developer is responsible for building, configuring, and extending the ServiceNow platform across both internal and client engagements, delivering scalable, secure, and high-quality solutions aligned to architectural standards and business requirements. You will provide hands-on technical execution for ServiceNow initiatives including ITSM and CSM implementations, platform modernizations, and legacy tool transitions (e.g., SysAid to ServiceNow), as well as the enablement of automation and AI-driven capabilities to improve operational efficiency and service experience.

Working under the guidance of the Solution Architect, the Senior Developer ensures solutions are upgrade-safe, maintainable, and production-ready, while supporting continuous improvement and managed services operations across client environments. To be successful, you will be responsible for:

• Configure and extend ServiceNow ITSM and CSM modules, including workflows, business rules, UI policies, client/server scripts, and catalog items.

• Build and maintain automation using Flow Designer and related tools.

• Support Virtual Agent and self-service experiences as part of automation and deflection strategies.

• Develop integrations using REST/SOAP APIs and IntegrationHub where required.

• Ensure configurations and customizations align with ServiceNow technical standards and architectural guidance.

• Support platform upgrade readiness by minimizing technical debt and participating in regression testing.

• Troubleshoot and resolve complex technical issues across the platform.

• Document technical designs and configurations for long-term maintainability.

• Collaborate closely with Functional Consultants, QA, and the Solution Architect throughout the delivery lifecycle.

• Participate in sprint planning, backlog grooming, and solution design discussions.

• Support UAT, deployment activities, and early-life support post go-live.

• Identify opportunities to automate manual processes and improve operational efficiency.

• Stay current with ServiceNow releases and emerging platform capabilities, including AI-driven features.

• Contribute to reusable technical components and accelerators for BDO’s ServiceNow practice.

How do we define success for your role?

• You demonstrate BDO Canada's core values through all aspect of your work: Integrity, Respect and Collaboration.

• You understand your client’s industry, challenges, and opportunities; client describe you as positive, professional, and delivering high quality work.

• You identify, recommend, and are focused on effective service delivery to your clients.

• You share in an inclusive and engaging work environment that develops, retains and attracts talent.

• You actively participate in the adoption of digital tools and strategies to drive an innovative workplace.

• You grow your expertise through learning and professional development.

Your Experience and Education

• 5+ years of hands-on ServiceNow development experience.

• Strong experience configuring ServiceNow ITSM; experience with CSM strongly preferred.

• Proficiency in JavaScript and ServiceNow scripting concepts.

• Experience with Flow Designer, IntegrationHub, and ServiceNow data models.

• Solid understanding of ServiceNow best practices, security, and upgrade-safe development

• Experience supporting platform migrations or large-scale implementations.

• Exposure to AI-enabled ServiceNow features (Virtual Agent, Predictive Intelligence).

• ServiceNow certifications:

  Certified System Administrator (CSA)

  Certified Implementation Specialist (ITSM and/or CSM)

The expected range of compensation for this role is $84,000 - $128,000 annually.