Help shape the technology that keeps 911 running!

We're looking for a Senior Developer to support and enhance the mission-critical systems behind Ontario's emergency health services. You'll work on technology that must operate 24/7, monitor performance in real time, fix issues before they impact emergency response, and build automations that keep everything running smoothly and reliably.

About the job

Bring your expertise in application development and data products support. In this role, you will:

• Lead project teams in the development, implementation, and maintenance of cost-effective web technology solutions and services

• Provide systems development, programming, and consulting expertise to clients

• Provide expertise in supporting and deploying applications in a multi-platform environment that house .Net applications and systems that utilize technologies such as .NET, Java and iOS Cross-Platform Mobile App Development

• Deploy appropriate CI/CD tools, strive for continuous improvement and build continuous integration, continuous development, and constant deployment pipelines (CI/CD Pipeline)

• Provide ongoing support to triage and resolve incidents arising from existing applications, services, reports and cloud infrastructure.

What you bring to the team

Technical Knowledge

Process and Data Modelling:

• You have advanced knowledge of process and data modelling, design, and development techniques.

• You can evaluate the feasibility of options and produce testing environments.

Programming Languages and Development Tools:

• You have knowledge of mobile application development with Flutter/Ionic/Angular or React.

• You have experience with emerging web technologies and cloud delivery/deployment models including Azure application support.

• You have advanced knowledge and hands-on experience with Microsoft .NET technologies (C#, ASP.NET, ASP.NET Core, MVC, WCF, IIS).

• You have strong expertise in developing APIs and web services (SOAP and REST), as well as building responsive web and Windows client applications.

• You have experience with UI design principles and creating user-centric interfaces for enterprise applications.

• You have proficiency in Java Enterprise technologies (JPA, Hibernate, Spring Framework).

• You have experience in MS Power BI (include DAX (Data Analysis Expressions) and Power Query

Systems Development Life Cycle and Methodologies:

• You have experience with test-driven development approaches.

• You have proven lifecycle software development experience across all phases of the SDLC and Application Lifecycle Management (ALM).

• You have an in-depth knowledge of Agile methodologies (e.g., SCRUM) and technical project leadership in fast-paced development environments.

Systems Design and Development:

• You have familiarity with .NET Core, Spring Boot Frameworks, REST and SOAP web services.

• You have an advanced understanding of systems design and development theory and principles.

• You have familiarity with related methods, techniques, practices, and standards including OpenShift and Kafka.

Database Development and Management:

• You have advanced knowledge of database development, management, and application database administration.

• You have experience with MS Power BI, SQL Programming, SQL Server Management Studio.

Cloud Services:

• You have experience developing secure, scalable applications leveraging cloud platforms such as Azure or AWS (e.g., Azure SQL, Azure Functions, etc.).

• You have experience with cloud-based delivery and deployment models and evaluating acquisition options for software, hardware, and web technology services.

• You have knowledge of Azure and AWS services focusing on computing, storage, database, and networking services.

Containerization and Orchestration:

• You have experience with Docker for containerization.

• You have familiarity with Kubernetes or Docker Swarm for orchestration to manage microservices and application deployment.

System Performance Optimization:

• You can diagnose and resolve system performance issues on cloud platforms.

• You have experience with optimization of configurations for best performance across different environments.

• You have familiarity with technologies such as OpenShift, Debezium, Azure Event Hub, Change Data Capture (CDC) Streaming Analytics, and Data Factory

Analytical and Problem-Solving Skills

• You have analytical skills to breakdown every technical problem and identify solutions for small pieces that can be used to solve bigger issues You can assess client's information/systems needs and lead the development of cost-effective information technology solutions.

• You can investigate and assess impact of application failures/errors and recommend resolution.

Communication and Interpersonal Skills

• You can lead discussion of systems development options and technical processes with project team.

• You can explain alternate solutions on systems development requirements.

• You are a team player and work effectively with colleagues and clients.

• You can coordinate and conduct technical training for staff and users.

• You can prepare business cases, Requests for Proposals, contracts, and project reports.

Project Management and Leadership Skills

• You can coordinate, provide input to the development of technical project plans, control project processes and provide technical leadership to project staff and external contractors.

Don't meet every qualification?

If you are excited about this position and meet most, but not all, of the listed qualifications, please still consider applying. We recognize that no one person might have every qualification in this job ad, and you just might be the right candidate!

How we support diversity, inclusion and accessibility We are building an inclusive workforce that reflects the communities we serve. We encourage everyone interested in working with us to apply, including people with disabilities, Indigenous, Black and racialized individuals, as well as people from all ethnicities, cultures, sexual orientations, gender identities and gender expressions.

Our hiring process is accessible, consistent with Ontario's Human Rights Code and the Accessibility for Ontarians with Disabilities Act, 2005. We are working to prevent and remove barriers in our hiring processes and can offer accommodation to address specific needs related to Code-protected grounds such as disability, family status and religion. For more information about accommodation during the hiring process please contact us.

Learn more about the work the OPS is doing to create an inclusive, anti-racist, accessible and diverse workplace:

• diversity, equity and inclusion initiatives

• accessibility

• Anti-Racism Policy

Additional information

Address: 1 English Temporary, duration up to 12 months, 5700 Yonge St, North York, Toronto Region

Compensation Group: Ontario Public Service Employees Union

Schedule: 6

Category: Information Technology

Posted on: Monday, March 23, 2026

Note: T-MG-241860/26

How to apply:

Please apply online, only, at www.ontario.ca/careers, quoting Job ID 241860, by Wednesday, April 8, 2026 11:59 pm EDT. Please follow the instructions to submit your application. If you require accommodation in order to participate in the recruitment process, please contact us at www.gojobs.gov.on.ca/ContactUs.aspx to provide your contact information. The Ontario Public Service is an inclusive employer. Accommodation will be provided in accordance with Ontario’s Human Rights Code.