Senior Systems Developer/Designer Job Details

Date: Sep 2, 2026

Location:

Pickering, ON, CA

Type of Position: Permanent

Type of Position:

Number of Positions: 1

Salary Min: $95,160.00

Salary Max: $115,796.00

Description:

Become a Senior Systems Developer/Designer with MPAC

Big Data. Real Impact.
MPAC is the largest property assessment jurisdiction in North America. Our Information Technology team builds and maintains platforms that power property data for every municipality in Ontario - open source tech, cloud computing, advanced analytics, and machine learning models. We tackle complex problems in an agile environment, and we move fast.

The Stack – Modern Technology. Enterprise Scale.
Our development teams work with a diverse and evolving technology ecosystem, including:

Front-End - React, Javascript, TypeScript, HTML5, CSS3
Back-End - Python, Groovy, RESTful APIs, Microservice Architecture
Workflow & BPM - Flowable BPM Platform, BPMN, CMMN, DMN Standards
Cloud & Infrastructure - AWS Lambda, Kubernetes, Elastic Search, PostgreSQL, CI/CD Pipelines
Development Practices - Automated Testing, Version Control, Continuous Integration/Continuous Delivery, Agile Delivery Methodologies

Not Just Another Developer Role

Based in Pickering, Ontario, this role offers the opportunity to lead the design, development and delivery of enterprise solutions that have a direct impact across the organization.

What You Can Expect:

Complex and meaningful projects that support critical business functions
Opportunities to lead solution design and technical decision-making
A highly skilled, collaborative team that values knowledge sharing
Leadership that supports innovation and continuous improvement
Flexible work arrangements, including hybrid work options
Exposure to modern cloud technologies and enterprise-scale systems

Job Description

What You Bring – Technical Leadership. Curiosity. Problem Solving.

You are forward-thinking and thrive on solving complex technical challenges. You combine strong development expertise with the ability to translate business requirements into scalable, maintainable technology solutions.

Experience & Technical Expertise:

Minimum 5 years of progressively hand-on software development experience
At least 2 years of experience in a senior technical development capacity leading analysis, design and implementation activities
Strong understanding of computer science fundamentals, including:
- Data structures and algorithms
- Object-oriented design principles
- Programming patterns and software design patterns
Experience applying software engineering best practices, including:
- CI/CD pipelines
- Automated testing
- Source control management
- Technical documentation
Hands on experience implementing complex business processes using, Flowable BPM Platform (work, design, control, and Flowable Forms, including: BPMN / CMMN / DMN Standards

Development Technologies:

Experience working with one or more of the following:

Java and Python
PostgreSQL
AWS technologies including Lambda Functions
Elastic Search
KubernetesJavaScript, React and TypeScript
HTML and CSS
RESTful APIs
Messaging and integration technologies

Business & Consulting Skills:

Demonstrated experience translating business requirements into effective technical solutions
Ability to evaluate options and recommend cost-effective, scalable approaches
Excellent communication skills with both technical and non-technical audiences

Nice to have:

Certification earned or in progress in the above technologies

What you will do - Lead. Design. Deliver.

As a Senior Systems Developer, you'll play a key role in the design, development and support of enterprise applications while helping shape technical direction and best practices.

Your Responsibilites:

Lead the analysis and design of information systems solutions that address business needs
Provide technical leadership throughout the software development lifecycle
Design and develop scalable, secure and maintainable solutions
Create prototypes and proof-of-concepts to validate technology approaches and architectural decisions
Ensure solutions meet performance, scalability and extensibility requirements
Lead investigations and troubleshooting efforts for complex production issues
Support deployments of new systems, enhancements and integrations
Provide senior-level technical consultation regarding solution design, effort estimates and resource requirements
Collaborate closely with business stakeholders, architects and infrastructure teams
Mentor and coach junior developers and technical staff
Research emerging technologies and recommend tools, standards and practices aligned with Enterprise Architecture
Provide ongoing application support and participate in production support activities as required

Additional Information:

Requisition ID: 3134
Existing Vacancy: Yes
Job Type: Union
Closing Date: September 16, 2026

Ready to apply?

Please note, only applications submitted through the Applicant Tracking System will be accepted.

Successful candidates will be required to undergo a background verification with Mintz Global Screening. By applying to this job posting, you are providing your consent to MPAC to share your name, email address and phone number with Mintz, to conduct the criminal and driver abstract check and for Mintz to disclose the results to MPAC, should you be the successful incumbent.

MPAC is committed to fostering an inclusive, accessible environment where all employees and members of the public feel valued, respected and supported. We are dedicated to building a workforce that reflect the diversity of the public and communities we serve.

Persons with disability who need accommodation in the application process or those needing job postings in an alternative format may email their request to careers@mpac.ca.

We may use technology and automated tools to support recruitment and selection processes. All artificial intelligence (AI) outputs are reviewed and validated by our recruitment team.

We thank all applicants for their interest, however, only those selected for further consideration will be contacted.

Please note that MPAC prohibits employees from holding a current/valid real estate license and successful applicants must at least suspend their real estate licenses during their period of employment at MPAC as outlined in our Employee Code of Conduct.

Job advertisements for positions that have been designated bilingual will be posted in both English and French on our website. Positions that are not designated bilingual are not translated and are only posted in English on the English version of our website.

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